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Integrated genomic characterization of endometrial carcinoma

The Cancer Genome Atlas Research Network

Nature volume  497 ,  pages 67–73 ( 2013 ) Cite this article

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An Erratum to this article was published on 12 June 2013

This article has been updated

We performed an integrated genomic, transcriptomic and proteomic characterization of 373 endometrial carcinomas using array- and sequencing-based technologies. Uterine serous tumours and ∼ 25% of high-grade endometrioid tumours had extensive copy number alterations, few DNA methylation changes, low oestrogen receptor/progesterone receptor levels, and frequent TP53 mutations. Most endometrioid tumours had few copy number alterations or TP53 mutations, but frequent mutations in PTEN , CTNNB1 , PIK3CA , ARID1A and KRAS and novel mutations in the SWI/SNF chromatin remodelling complex gene ARID5B . A subset of endometrioid tumours that we identified had a markedly increased transversion mutation frequency and newly identified hotspot mutations in POLE . Our results classified endometrial cancers into four categories: POLE ultramutated, microsatellite instability hypermutated, copy-number low, and copy-number high. Uterine serous carcinomas share genomic features with ovarian serous and basal-like breast carcinomas. We demonstrated that the genomic features of endometrial carcinomas permit a reclassification that may affect post-surgical adjuvant treatment for women with aggressive tumours.

Endometrial cancer arises from the lining of the uterus. It is the fourth most common malignancy among women in the United States, with an estimated 49,500 new cases and 8,200 deaths in 2013 (ref. 1 ). Most patients present with low-grade, early-stage disease. The majority of patients with more aggressive, high-grade tumours who have disease spread beyond the uterus will progress within 1 year (refs 2 , 3 ). Endometrial cancers have been broadly classified into two groups 4 . Type I endometrioid tumours are linked to oestrogen excess, obesity, hormone-receptor positivity, and favourable prognosis compared with type II, primarily serous, tumours that are more common in older, non-obese women and have a worse outcome. Early-stage endometrioid cancers are often treated with adjuvant radiotherapy, whereas serous tumours are treated with chemotherapy, similar to advanced-stage cancers of either histological subtype. Therefore, proper subtype classification is crucial for selecting appropriate adjuvant therapy.

Several previous reports suggest that PTEN mutations occur early in the neoplastic process of type I tumours and co-exist frequently with other mutations in the phosphatidylinositol-3-OH kinase (PI(3)K)/AKT pathway 5 , 6 . Other commonly mutated genes in type I tumours include FGFR2 , ARID1A , CTNNB1 , PIK3CA , PIK3R1 and KRAS 7 , 8 , 9 . Microsatellite instability (MSI) is found in approximately one-third of type I tumours, but is infrequent in type II tumours 10 . TP53 , PIK3CA and PPP2R1A mutations are frequent in type II tumours 11 , 12 . Most of these studies have been limited to DNA sequencing only with samples of heterogeneous histological subtypes and tumour grades. We present a comprehensive, multiplatform analysis of 373 endometrial carcinomas including low-grade endometrioid, high-grade endometrioid, and serous carcinomas. This integrated analysis provides key molecular insights into tumour classification, which may have a direct effect on treatment recommendations for patients, and provides opportunities for genome-guided clinical trials and drug development.

Tumour samples and corresponding germline DNA were collected from 373 patients, including 307 endometrioid and 66 serous (53) or mixed histology (13) cases. Local Institutional Review Boards approved all tissue acquisition. The clinical and pathological characteristics of the samples generally reflect a cross-section of individuals with recurrent endometrial cancer 2 , 3 ( Supplementary Table 1.1 ). The median follow-up of the cohort was 32 months (range, 1–195 months); 21% of the patients have recurred, and 11% have died. Comprehensive molecular analyses were performed at independent centres using six genomic or proteomic platforms ( Supplementary Table 1.2 ). MSI testing performed on all samples using seven repeat loci ( Supplementary Table 1.3 ) found MSI in 40% of endometrioid tumours and 2% of serous tumours.

Somatic copy number alterations

Somatic copy number alterations (SCNAs) were assessed in 363 endometrial carcinomas. Unsupervised hierarchical clustering grouped the tumours into four clusters ( Fig. 1a ). The first three copy-number clusters were composed almost exclusively (97%) of endometrioid tumours without significant differences in tumour grades. Cluster 1 tumours were nearly devoid of broad SCNAs, averaging less than 0.5% genome alteration, with no significant recurrent events. Cluster 1 tumours also had significantly increased non-synonymous mutation rates compared to all others (median 7.2 × 10 −6 versus 1.7 × 10 −6 mutations per megabase (Mb), P  < 0.001). Copy-number clusters 2 and 3 consisted mainly of endometrioid tumours, distinguished by more frequent 1q amplification in cluster 3 than cluster 2 (100% of cluster 3 tumours versus 33% of cluster 2 tumours) and worse progression-free survival ( P = 0.003, log-rank versus clusters 1 and 2; Fig. 1b ).

figure 1

a , Tumours were hierarchically clustered into four groups based on SCNAs. The heat map shows SCNAs in each tumour (horizontal axis) plotted by chromosomal location (vertical axis). Chr., chromosome. b , Kaplan–Meier curves of progression-free survival for each copy-number cluster.

PowerPoint slide

Most of the serous (50 out of 53; 94%) and mixed histology (8 out of 13; 62%) tumours clustered with 36 (12%) of the 289 endometrioid tumours, including 24% of grade 3 and 5% of grade 1 or 2, into copy-number cluster 4; a single group characterized by a very high degree of SCNAs ( Supplementary Fig. 2.1 ; focal SCNAs with false discovery rate (FDR) < 0.15, and Supplementary Data 2.1 ). Cluster 4 tumours were characterized by significantly recurrent previously reported focal amplifications of the oncogenes MYC (8q24.12), ERBB2 (17q12) and CCNE1 (19q12) 13 , and by SCNAs previously unreported in endometrial cancers including those containing FGFR3 (4p16.3) and SOX17 (8q11.23). Cluster 4 tumours also had frequent TP53 mutations (90%), little MSI (6%), and fewer PTEN mutations (11%) than other endometrioid tumours (84%). Overall, these findings suggest that a subset of endometrial tumours contain distinct patterns of SCNAs and mutations that do not correlate with traditional tumour histology or grade.

As expected, tumours in the ‘serous-like’ cluster (cluster 4) had significantly worse progression-free survival than tumours in the endometrioid cluster groups ( P = 0.003, log-rank, Fig. 1b ). Potential therapeutically relevant SCNAs included the cluster 2 15q26.2 focal amplification, which contained IGF1R ; and cluster 4 amplifications of ERBB2 , FGFR1 and FGFR3 , and LRP1B deletion, which was recently associated with resistance to liposomal doxorubicin in serous ovarian cancer 14 .

Exome sequence analysis

We sequenced the exomes of 248 tumour/normal pairs. On the basis of a combination of somatic nucleotide substitutions, MSI and SCNAs, the endometrial tumours were classified into four groups ( Fig. 2a, b ): (1) an ultramutated group with unusually high mutation rates (232 × 10 −6 mutations per Mb) and a unique nucleotide change spectrum; (2) a hypermutated group (18 × 10 −6 mutations per Mb) of MSI tumours, most with MLH1 promoter methylation; (3) a group with lower mutation frequency (2.9 × 10 −6 mutations per Mb) and most of the microsatellite stable (MSS) endometrioid cancers; and (4) a group that consists primarily of serous-like cancers with extensive SCNA (copy-number cluster 4) and a low mutation rate (2.3 × 10 −6 mutations per Mb). The ultramutated group consisted of 17 (7%) tumours exemplified by an increased C→A transversion frequency, all with mutations in the exonuclease domain of POLE , and an improved progression-free survival ( Fig. 2a, c ). POLE is a catalytic subunit of DNA polymerase epsilon involved in nuclear DNA replication and repair. We identified hotspot mutations in POLE at Pro286Arg and Val411Leu present in 13 (76%) of the 17 ultramutated samples. Significantly mutated genes (SMGs) identified at low FDRs ( Q ) in this subset included PTEN (94%, Q = 0), PIK3R1 (65%, Q = 8.3 × 10 −7 ), PIK3CA (71%, Q = 9.1 × 10 −5 ), FBXW7 (82%, Q = 1.4 × 10 −4 ), KRAS (53%, Q = 9.2 × 10 −4 ) and POLE (100%, Q = 4.2 × 10 −3 ). Mutation rates in POLE mutant endometrial and previously reported ultramutated colorectal tumours exceeded those found in any other lineage including lung cancer and melanoma 15 , 16 , 17 . Germline susceptibility variants have been reported in POLE (Leu424Val) and POLD1 (Ser478Asn), but were not found in our endometrial normal exome-seq reads 18 .

figure 2

a , Mutation frequencies (vertical axis, top panel) plotted for each tumour (horizontal axis). Nucleotide substitutions are shown in the middle panel, with a high frequency of C-to-A transversions in the samples with POLE exonuclease mutations. CN, copy number. b , Tumours were stratified into the four groups by (1) nucleotide substitution frequencies and patterns, (2) MSI status, and (3) copy-number cluster. SNV, single nucleotide variant. c , POLE -mutant tumours have significantly better progression-free survival, whereas copy-number high tumours have the poorest outcome. d , Recurrently mutated genes are different between the four subgroups. Shown are the mutation frequencies of all genes that were significantly mutated in at least one of the four subgroups (MUSiC, asterisk denotes FDR < 0.05).

The MSI endometrioid tumours had a mutation frequency approximately tenfold greater than MSS endometrioid tumours, few SCNAs, frameshift deletions in RPL22 , frequent non-synonymous KRAS mutations, and few mutations in FBXW7 , CTNNB1 , PPP2R1A and TP53 . The MSS, copy-number low, endometrioid tumours had an unusually high frequency of CTNNB1 mutations (52%); the only gene with a higher mutation frequency than the MSI samples. The copy-number high group contained all of the remaining serous cases and one-quarter of the grade 3 endometrioid cases. Most of these tumours had TP53 mutations and a high frequency of FBXW7 (22%, Q = 0) and PPP2R1A (22%, Q = 1.7 × 10 −16 ) mutations, previously reported as common in uterine serous but not endometrioid carcinomas. Thus, a subset of high-grade endometrioid tumours had similar SCNAs and mutation spectra as uterine serous carcinomas, suggesting that these patients might benefit from treatment approaches that parallel those for serous tumours.

There were 48 genes with differential mutation frequencies across the four groups ( Fig. 2d and Supplementary Data 3.1 ). ARID5B , a member of the same AT-rich interaction domain (ARID) family as ARID1A , was more frequently mutated in MSI (23.1%) than in either MSS endometrioid (5.6%) or high SCNA serous tumours (0%), a novel finding for endometrial cancer. Frameshifting RPL22 indels near a homopolymer at Lys 15 were almost exclusively found in the MSI group (36.9%). The TP53 mutation frequency (>90%) in serous tumours differentiated them from the endometrioid subtypes (11.4%). However, many (10 out of 20; 50%) endometrioid tumours with a non-silent TP53 mutation also had non-silent mutations in PTEN , compared to only 1 out of 39 (2.6%) serous tumours with non-silent TP53 mutations. Although TP53 mutations are not restricted to serous tumours, the co-existing PTEN mutations in the endometrioid cases suggest a distinct tumorigenic mechanism.

Comparisons of 66 SMGs between traditional histological subtypes are provided ( Supplementary Methods 3 ), and SMGs across other subcohorts can be found in Supplementary Data 3.2 . The spectrum of PIK3CA and PTEN mutations in endometrial cancer also differed from other solid tumours ( Supplementary Methods 3 ). Integrated analysis may be useful for identifying histologically misclassified cases. For example, a single serous case was identified without a TP53 mutation or extensive SCNAs and with a KRAS mutation and high mutation rate. After re-review of the histological section, the case was deemed consistent with a grade 3 endometrioid tumour, demonstrating how molecular analysis could reclassify tumour histology and potentially affect treatment decisions.

Multiplatform subtype classifications

All of the endometrial tumours were examined for messenger RNA expression ( n = 333), protein expression ( n = 293), microRNA expression ( n = 367), and DNA methylation ( n = 373) ( Supplementary Methods 4–7 ). Unsupervised k -means clustering of mRNA expression from RNA sequencing identified three robust clusters termed ‘mitotic’, ‘hormonal’ and ‘immunoreactive’ ( Supplementary Fig. 4.1 ) that were significantly correlated with the four integrated clusters; POLE , MSI, copy-number low and copy-number high ( P  < 0.0001). Supervised analysis identified signature genes of the POLE cluster ( n = 17) mostly involved in cellular metabolism ( Fig. 3a ). Among the few signature genes in the MSI cluster was decreased MLH1 mRNA expression, probably due to its promoter methylation. Increased progesterone receptor ( PGR ) expression was noted in the copy-number low cluster, suggesting responsiveness to hormonal therapy. The copy-number high cluster, which included most of the serous and serous-like endometrioid tumours, exhibited the greatest transcriptional activity exemplified by increased cell cycle deregulation (for example, CCNE1 , PIK3CA , MYC and CDKN2A ) and TP53 mutation ( Supplementary Figs 4.2 and 4.3 ). This is consistent with reports that increased CDKN2A can distinguish serous from endometrioid carcinomas 19 . Approximately 85% of cases in the copy-number high cluster shared membership with the ‘mitotic’ mRNA subtype.

figure 3

a , Supervised analysis of ∼ 1,500 genes significantly associated with integrated subtypes. b , Heat map of protein expression clusters, supervised by integrated subtypes. Samples are in columns; genes or proteins are in rows.

Supervised clustering of the reverse phase protein array (RPPA) expression data was consistent with loss of function for many of the mutated genes ( Fig. 3b ). TP53 was frequently mutated in the copy-number high group ( P = 2.5 × 10 −27 ) and its protein expression was also increased, suggesting that these mutations are associated with increased expression. By contrast, PTEN ( P = 2.8 × 10 −19 ) and ARID1A ( P = 1.2 × 10 −6 ) had high mutation rates in the remaining groups, but their expression was decreased, suggesting inactivating mutations in both genes. The copy-number high group also had decreased levels of phospho-AKT, consistent with downregulation of the AKT pathway. The copy-number low group had raised RAD50 expression, which is associated with DNA repair, explaining some of the differences between the copy-number high and low groups. The POLE group had high expression of ASNS and CCNB1, whereas the MSI tumours had both high phospho-AKT and low PTEN expression.

Unsupervised clustering of DNA methylation data generated from Illumina Infinium DNA methylation arrays revealed four unique subtypes (MC1–4) that support the four integrative clusters. A heavily methylated subtype (MC1) reminiscent of the CpG island methylator phenotype (CIMP) described in colon cancers and glioblastomas 20 , 21 , 22 was associated with the MSI subtype and attributable to promoter hypermethylation of MLH1 . A serous-like cluster (MC3) with minimal DNA methylation changes was composed primarily of serous tumours and some endometrioid tumours ( Supplementary Fig. 7.1 ) and contained most of the copy-number high tumours.

Integrative clustering using the iCluster framework returned two major clusters split primarily on serous and endometrioid histology highlighting TP53 mutations, lack of PTEN mutation and encompassing almost exclusively copy-number high tumours 23 ( Supplementary Fig. 8.1 ). We developed a new clustering algorithm, called SuperCluster, to derive overall subtypes based on sample cluster memberships across all data types ( Supplementary Fig. 9.1 ). SuperCluster identified four clusters that generally confirmed the contributions of individual platforms to the overall integrated clusters. No major batch effects were identified for any platform ( Supplementary Methods 10 ).

Structural aberrations

To identify somatic chromosomal aberrations, we performed low-pass, paired-end, whole-genome sequencing on 106 tumours with matched normals. We found recurrent translocations involving genes in several pathways including WNT, EGFR–RAS–MAPK, PI(3)K, protein kinase A, retinoblastoma and apoptosis. The most frequent translocations (5 out of 106) involved a member of the BCL family ( BCL2 , BCL7A , BCL9 and BCL2L11 ). Four of these were confirmed by identification of the translocation junction point and two were also confirmed by high-throughput RNA sequencing (RNA-Seq). In all cases the translocations result in in-frame fusions and are predicted to result in activation or increased expression of the BCL family members ( Supplementary Fig. 3.2 ). Translocations involving members of the BCL family leading to reduced apoptosis have been described in other tumour types 24 and our results suggest that similar mechanisms may be operative here.

Pathway alterations

Multiple platform data were integrated to identify recurrently altered pathways in the four endometrial cancer integrated subgroups. Because of the high background mutation rate and small sample size, we excluded the POLE subgroup from this analysis. Considering all recurrently mutated, homozygously deleted, and amplified genes, we used MEMo 25 to identify gene networks with mutually exclusive alteration patterns in each subgroup. The most significant module was found in the copy-number low group and contained CTNNB1 , KRAS and SOX17 ( Fig. 4a ). The very strong mutual exclusivity between mutations in these three genes suggests that alternative mechanisms activate WNT signalling in endometrioid endometrial cancer. Activating KRAS mutations have been shown to increase the stability of β-catenin via glycogen synthase kinase 3β (GSK-3β), leading to an alternative mechanism of β-catenin activation other than adenomatous polyposis coli degradation 26 . SOX17 , which mediates proteasomal degradation of β-catenin 27 , 28 , is mutated exclusively in the copy-number low group (8%) at recurrent positions (Ala96Gly and Ser403Ile) not previously described. Other genes with mutually exclusive alteration patterns in this module were FBXW7 , FGFR2 and ERBB2 (ref. 29 ). ERBB2 was focally amplified with protein overexpression in 25% of the serous or serous-like tumours, suggesting a potential role for human epidermal growth factor receptor 2 (HER2)-targeted inhibitors. A small clinical trial of trastuzumab found no activity in endometrial carcinoma, but accrued few HER2 fluorescence in situ hybridization (FISH)-amplified serous carcinomas 30 .

figure 4

a , The RTK/RAS/β-catenin pathway is altered through several mechanisms that exhibit mutually exclusive patterns. Alteration frequencies are expressed as a percentage of all cases. The right panel shows patterns of occurrence. b , The PI(3)K pathway has mutually exclusive PIK3CA and PIK3R1 alterations that frequently co-occur with PTEN alterations in the MSI and copy-number low subgroups. c , Heat map display of top 1,000 varying pathway features within PARADIGM consensus clusters. Samples were arranged in order of their consensus cluster membership. The genomic subtype for each sample is displayed below the consensus clusters.

PIK3CA and PIK3R1 mutations were frequent and showed a strong tendency for mutual exclusivity in all subgroups, but unlike other tumour types, they co-occurred with PTEN mutations in the MSI and copy-number low subgroups as previously reported 5 , 9 ( Fig. 4b ). The copy-number high subgroup showed mutual exclusivity between alterations of all three genes. Overall, 93% of endometrioid tumours had mutations that suggested potential for targeted therapy with PI(3)K/AKT pathway inhibitors.

Consensus clustering of copy number, mRNA expression and pathway interaction data for 324 samples yielded five PARADIGM clusters with distinct pathway activation patterns 31 ( Fig. 4c and Supplementary Methods 11 ). PARADIGM cluster 1 had the lowest level of MYC pathway activation and highest level of WNT pathway activation, consistent with its composition of copy-number low cases having frequent CTNNB1 mutations. PARADIGM cluster 3 was composed predominantly of the copy-number high cases, with relatively high MYC/MAX signalling but low oestrogen receptor/FOXA1 signalling and p53 activity. Only TP53 truncation and not missense mutations were implicated as loss-of-function mutations, suggesting different classes of p53 mutations may have distinct signalling consequences. PARADIGM cluster 5 was enriched for hormone receptor expression.

Comparison to ovarian and breast cancers

The clinical and pathologic features of uterine serous carcinoma and high-grade serous ovarian carcinoma (HGSOC) are quite similar. HGSOC shares many similar molecular features with basal-like breast carcinoma 32 . Focal SCNA patterns were similar between these three tumour subtypes and unsupervised clustering identified relatedness ( Fig. 5a and Supplementary Fig. 12.1 ). Supervised analysis of transcriptome data sets showed high correlation between tumour subtypes ( Supplementary Fig. 12.2 ). The MC3 DNA methylation subtype with minimal DNA methylation changes was also similar to basal-like breast and HGSOCs ( Supplementary Fig. 12.3 ). A high frequency of TP53 mutations is shared across these tumour subtypes (uterine serous, 91%; HGSOC, 96%; basal-like breast, 84%) 33 , 34 , as is the very low frequency of PTEN mutations (uterine serous, 2%; HGSOC, 1%; basal-like breast, 1%). Differences included a higher frequency of FBXW7 , PPP2R1A and PIK3CA mutations in uterine serous compared to basal-like breast and HGSOCs ( Fig. 5b ). We showed that uterine serous carcinomas share many molecular features with both HGSOCs and basal-like breast carcinomas, despite more frequent mutations, suggesting new opportunities for overlapping treatment paradigms.

figure 5

a , SCNAs for each tumour type. b , Frequency of genomic alterations present in at least 10% of one tumour type.

This integrated genomic and proteomic analysis of 373 endometrial cancers provides insights into disease biology and diagnostic classification that could have immediate therapeutic application. Our analysis identified four new groups of tumours based on integrated genomic data, including a novel POLE subtype in ∼ 10% of endometrioid tumours. Ultrahigh somatic mutation frequency, MSS, and common, newly identified hotspot mutations in the exonuclease domain of POLE characterize this subtype. SCNAs add a layer of resolution, revealing that most endometrioid tumours have few SCNAs, most serous and serous-like tumours exhibit extensive SCNAs, and the extent of SCNA roughly correlates with progression-free survival.

Endometrial cancer has more frequent mutations in the PI(3)K/AKT pathway than any other tumour type studied by The Cancer Genome Atlas (TCGA) so far. Endometrioid endometrial carcinomas share many characteristics with colorectal carcinoma including a high frequency of MSI (40% and 11%, respectively), POLE mutations (7% and 3%, respectively) leading to ultrahigh mutation rates, and frequent activation of WNT/CTNNB1 signalling; yet endometrial carcinomas have novel exclusivity of KRAS and CTNNB1 mutations and a distinct mechanism of pathway activation. Uterine serous carcinomas share many similar characteristics with basal-like breast and HGSOCs; three tumour types with high-frequency non-silent TP53 mutations and extensive SCNA. However, the high frequency of PIK3CA , FBXW7 , PPP2R1A and ARID1A mutations in uterine serous carcinomas are not found in basal-like breast and HGSOCs. The frequency of mutations in PIK3CA , FBXW7 and PPP2R1A was ∼ 30% higher than in a recently reported study of 76 uterine serous carcinomas 11 , but similar to another study 12 . Uterine serous carcinomas have ERBB2 amplification in 27% of tumours and PIK3CA mutations in 42%, which provide translational opportunities for targeted therapeutics.

Early stage type I endometrioid tumours are often treated with adjuvant radiotherapy, whereas similarly staged type II serous tumours are treated with chemotherapy. High-grade serous and endometrioid endometrial carcinomas are difficult to subtype correctly, and intra-observer concordance among speciality pathologists is low 7 , 34 , 35 , 36 . Our molecular characterization data demonstrate that ∼ 25% of tumours classified as high-grade endometrioid by pathologists have a molecular phenotype similar to uterine serous carcinomas, including frequent TP53 mutations and extensive SCNA. The compelling similarities between this subset of endometrioid tumours and uterine serous carcinomas suggest that genomic-based classification may lead to improved management of these patients. Clinicians should carefully consider treating copy-number-altered endometrioid patients with chemotherapy rather than adjuvant radiotherapy and formally test such hypotheses in prospective clinical trials. Furthermore, the marked molecular differences between endometrioid and serous-like tumours suggest that these tumours warrant separate clinical trials to develop the independent treatment paradigms that have improved outcomes in other tumour types, such as breast cancer.

Methods Summary

Biospecimens were obtained from 373 patients after Institutional Review Board-approved consents. DNA and RNA were co-isolated using a modified AllPrep kit (Qiagen). We used Affymetrix SNP 6.0 microarrays to detect SCNAs in 363 samples and GISTIC analysis to identify recurrent events 37 . The exomes of 248 tumours were sequenced to a read-depth of at least ×20. We performed low-pass whole-genome sequencing on 107 tumours to a mean depth of ×6. Consensus clustering was used to analyse mRNA, miRNA, RPPA and methylation data with methods previously described 38 , 39 , 40 . Integrated cross-platform analyses were performed using MEMo, iCluster and PARADIGM 25 , 31 .

Change history

12 june 2013.

Nature 497, 67–73 (2013); doi:10.1038/nature12113 In the ‘Results’ section of this Article, the range in the sentence “The median follow-up of the cohort was 32 months (range, 1–19 months); 21% of the patients have recurred, and 11% have died.” should have been 1–195 months. This error has been corrected in the HTML and PDF versions of the paper.

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We wish to thank all patients and families who contributed to this study. We thank M. Sheth and L. Lund for administrative coordination of TCGA activities, G. Monemvasitis for editing the manuscript, and C. Gunter for critical reading of the manuscript. This work was supported by the following grants from the US National Institutes of Health: 5U24CA143799-04, 5U24CA143835-04, 5U24CA143840-04, 5U24CA143843-04, 5U24CA143845-04, 5U24CA143848-04, 5U24CA143858-04, 5U24CA143866-04, 5U24CA143867-04, 5U24CA143882-04, 5U24CA143883-04, 5U24CA144025-04, U54HG003067-11, U54HG003079-10 and U54HG003273-10.

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The TCGA Research Network contributed collectively to this study. Biospecimens were provided by the tissue source sites and processed by the biospecimen core resource. Data generation and analyses were performed by the genome sequencing centres, cancer genome characterization centres and genome data analysis centres. All data were released through the data coordinating centre. The National Cancer Institute and National Human Genome Research Institute project teams coordinated project activities. We also acknowledge the following TCGA investigators who made substantial contributions to the project: N.S. (manuscript coordinator); J. Gao (data coordinator); C.K. and L. Ding (DNA sequence analysis); W.Z. and Y.L. (mRNA sequence analysis); H.S. and P.W.L. (DNA methylation analysis); A.D.C. and I.P. (copy number analysis); S.L. and A. Hadjipanayis (translocations); N.S., N.W. G.C., C.C.B. and C.Y. (pathway analysis); Andy C. and A.G.R. (miRNA sequence analysis); R. Broaddus, P.J.G., G.B.M. and R.A.S. (pathology and clinical expertise); G.B.M., H.L. and R.A. (reverse phase protein arrays); P.J.G. and R.B. (disease experts); G.B.M. and R.K. (manuscript editing); D.A.L. and E.R.M. (project chairs).

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Correspondence to Douglas A. Levine .

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Additional information

The primary and processed data used to generate the analyses presented here are deposited at the Data Coordinating Center ( ); all of the primary sequence files are deposited in CGHub ( ). Sample lists, data matrices and supporting data can be found at: ( ). The data can be explored via the cBio Cancer Genomics Portal ( ). Reprints and permissions information is available at . The authors declare no competing financial interests. Readers are welcome to comment on the online version of the paper. Correspondence and requests for materials should be addressed to D.A.L. ([email protected]).

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Levine, D., The Cancer Genome Atlas Research Network. Integrated genomic characterization of endometrial carcinoma. Nature 497 , 67–73 (2013).

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Received : 10 December 2012

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Published : 01 May 2013

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Treatment strategies for endometrial cancer: current practice and perspective


Purpose of review: Endometrial cancer incidence is increasing in North America and is a major cause of morbidity and mortality in women. We review recent literature published on treatment of endometrial cancer and highlight areas of active interest.

Recent findings: There has been movement toward minimal invasive surgery at diagnosis; lymph node staging remains controversial and continues to be investigated. Progress has been made to establish consensus on endometrial cancer risk classification to promote consistency for future trial design. Molecular characterization of endometrial cancer and its integration into clinicopathological profiling to develop predictive biomarkers for treatment selection are active areas of research. Optimal adjuvant treatment strategy in high-risk endometrial cancer remains to be defined with recognition of treatment-related toxicity. Despite encouraging results in drug development for treatment of advanced/recurrent endometrial cancer, no targeted therapies beyond hormonal therapy are approved. There is an urgent need for scientifically validated therapy with predictive biomarkers.

Summary: Our understanding of endometrial cancer has evolved through improvements in molecular biology, allowing improved definition of target-specific therapies. The precise role and sequence of conventional and targeted therapies, including immunotherapy, will require careful attention to the design of clinical trials with translational emphasis to allow the discovery, validation, and implementation of predictive biomarkers into clinical care.

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Uterine Cancer Research Results and Study Updates

See Advances in Endometrial Cancer Research for an overview of recent findings and progress, plus ongoing projects supported by NCI.

For some women with HER2-positive uterine serous carcinoma, a rare type of endometrial cancer, treating them with trastuzumab (Herceptin) and chemotherapy may help them live longer, according to updated results from a small clinical trial.

Women with cervical or uterine cancer who received radiation to the pelvic region reported side effects much more often using an online reporting system called PRO-CTCAE than they did during conversations with their clinicians, a new study shows.

Some women with endometrial cancer may be able to receive less intensive treatment, chemotherapy and no radiation, without increasing their risk of the disease recurring within 5 years, according to the results of a randomized clinical trial.

An NCI-led study shows rates for aggressive subtypes of uterine cancer rose rapidly among women ages 30 to 79 from 2000–2015. The findings, published in the Journal of Clinical Oncology, also reveal racial disparities in incidence and survival rates.

A new study has found that 90% of postmenopausal women diagnosed with endometrial cancer reported vaginal bleeding before their diagnosis. Approximately 9% of postmenopausal women who saw a doctor for bleeding, the study showed, later received an endometrial cancer diagnosis.

Scientists have struggled to come up with a simple test to detect endometrial and ovarian cancers early, when they are most likely to respond to treatment. Can a liquid biopsy test called PapSEEK change that?

Diagnoses of endometrial cancer have increased worldwide in recent years, with rates rising in more than half of the 43 countries studied during the decade ending around 2010, a team of international researchers has shown.


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