Document Detail

Racial differences in oncogene mutations detected in early-stage low-grade endometrial cancers.
MedLine Citation:
PMID:  23013731     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To describe the pattern and frequency of oncogene mutations in white and African American women with endometrial cancer and to determine if racial differences in oncogene mutations exist among women with pathologically similar tumors.
METHODS: Patients with endometrial cancer from a large urban hospital were identified through medical records, and representative formalin-fixed paraffin-embedded tumor blocks were retrieved. The study sample included 150 patients (84 African Americans) who underwent total abdominal hysterectomy for endometrial cancer. The Sequenom MassARRAY system and the OncoCarta Assay version 1.0 (Sequenom) were used to test for 238 mutations in 19 common oncogenes. The χ(2) test and the Fisher exact test were used to assess differences in distribution of variables by race and oncogene mutation status.
RESULTS: There were 20 mutations identified in 2 oncogenes (PIK3CA and KRAS) in tumors from 19 women (12.7%). Most of the mutations were found in PIK3CA (16/20). Thirteen percent of endometrioid tumors harbored mutations (11 PIK3CA and 2 KRAS) as did 29% of the malignant mixed Mullerian tumors (3 PIK3CA and 1 KRAS). There were no observed mutations in serous, clear cell, or mucinous tumor types. Among low-grade endometrioid cancers, tumors from African American patients were significantly associated with harboring either a KRAS or PIK3CA mutation (P = 0.04), with 7 PIK3CA mutations and all 4 KRAS mutations identified in African American women.
CONCLUSIONS: This study provides preliminary evidence that oncogene mutation frequency of some subtypes of histologically similar endometrial carcinoma differ by race. Additional studies are needed to further explore this phenomenon in patients with endometrial carcinoma.
Michele L Cote; Govindaraja Atikukke; Julie J Ruterbusch; Sara H Olson; Shawnita Sealy-Jefferson; Benjamin A Rybicki; Sharon Hensley Alford; Mohammad A Elshaikh; Arthur R Gaba; Daniel Schultz; Ramsi Haddad; Adnan R Munkarah; Rouba Ali-Fehmi
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of gynecological cancer : official journal of the International Gynecological Cancer Society     Volume:  22     ISSN:  1525-1438     ISO Abbreviation:  Int. J. Gynecol. Cancer     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-09-27     Completed Date:  2013-03-21     Revised Date:  2013-10-17    
Medline Journal Info:
Nlm Unique ID:  9111626     Medline TA:  Int J Gynecol Cancer     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1367-72     Citation Subset:  IM    
Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA.
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MeSH Terms
Adenocarcinoma, Clear Cell / ethnology,  genetics,  pathology
Adenocarcinoma, Mucinous / ethnology,  genetics,  pathology
African Americans / genetics*
Aged, 80 and over
Cystadenocarcinoma, Serous / ethnology,  genetics,  pathology
Endometrial Neoplasms / ethnology*,  genetics,  pathology
European Continental Ancestry Group / genetics*
Follow-Up Studies
Middle Aged
Mutation / genetics*
Neoplasm Grading
Neoplasm Staging
Phosphatidylinositol 3-Kinases / genetics*
Proto-Oncogene Proteins / genetics*
Retrospective Studies
Survival Rate
ras Proteins / genetics*
Grant Support
Reg. No./Substance:
0/KRAS protein, human; 0/Proto-Oncogene Proteins; EC 2.7.1.-/Phosphatidylinositol 3-Kinases; EC protein, human; EC Proteins

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