title: HER2 amplification and clinicopathological characteristics in a large Asian cohort of rare mucinous ovarian cancer.
abstract: Mucinous epithelial ovarian cancer has a poor prognosis in the advanced stages and responds poorly to conventional chemotherapy. We aim to elucidate the clinicopathological factors and incidence of HER2 expression of this cancer in a large Asian retrospective cohort from Singapore. Of a total of 133 cases, the median age at diagnosis was 48.3 years (range, 15.8-89.0 years), comparatively younger than western cohorts. Most were Chinese (71%), followed by Malays (16%), others (9.0%), and Indians (5%). 24% were noted to have a significant family history of malignancy of which breast and gastrointestinal cancers the most prominent. Majority of the patients (80%) had stage I disease at diagnosis. Information on HER2 status was available in 113 cases (85%). Of these, 31 cases (27.4%) were HER2+, higher than 18.8% reported in western population. HER2 positivity appeared to be lower among Chinese and higher among Malays patients (p = 0.052). With the current standard of care, there was no discernible impact of HER2 status on overall survival. (HR = 1.79; 95% CI, 0.66-4.85; p = 0.249). On the other hand, positive family history of cancer, presence of lymphovascular invasion, and ovarian surface involvements were significantly associated with inferior overall survival on univariate and continued to be statistically significant after adjustment for stage. While these clinical factors identify high risk patients, it is promising that the finding of a high incidence of HER2 in our Asian population may allow development of a HER2 targeted therapy to improve the management of mucinous ovarian cancers.
authors.affiliation: Department of Medical Oncology, National Cancer Centre, Singapore, Singapore. chay.w.y@nccs.com.sg
authors.forename: Wen-Yee
authors.initials: WY
authors.lastname: Chay
authors.forename: Sung-Hock
authors.initials: SH
authors.lastname: Chew
authors.forename: Whee-Sze
authors.initials: WS
authors.lastname: Ong
authors.forename: Inny
authors.initials: I
authors.lastname: Busmanis
authors.forename: Xinyun
authors.initials: X
authors.lastname: Li
authors.forename: Sharyl
authors.initials: S
authors.lastname: Thung
authors.forename: Lynette
authors.initials: L
authors.lastname: Ngo
authors.forename: Sheow-Lei
authors.initials: SL
authors.lastname: Lim
authors.forename: Yong-Kuei
authors.initials: YK
authors.lastname: Lim
authors.forename: Yin-Nin
authors.initials: YN
authors.lastname: Chia
authors.forename: Elisa
authors.initials: E
authors.lastname: Koh
authors.forename: Cindy
authors.initials: C
authors.lastname: Pang
authors.forename: Lay-Tin
authors.initials: LT
authors.lastname: Soh
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.forename: Tew-Hong
authors.initials: TH
authors.lastname: Ho
authors.forename: Sun-Kuie
authors.initials: SK
authors.lastname: Tay
authors.forename: Soo-Kim
authors.initials: SK
authors.lastname: Lim-Tan
authors.forename: Kiat-Hon
authors.initials: KH
authors.lastname: Lim
authors.forename: John Whay-Kuang
authors.initials: JW
authors.lastname: Chia
authors.forename: Liang-Kee
authors.initials: LK
authors.lastname: Goh
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000235:genetics* / Q000473:pathology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000235:genetics*; D015331:Cohort Studies; D018572:Disease-Free Survival; D005190:Family; D005260:Female; D005784:Gene Amplification; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000235:genetics* / Q000473:pathology*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics*; D012846:Singapore; D055815:Young Adult
chemical_list: D018719:Erb-b2 Receptor Tyrosine Kinases; C508053:ERBB2 protein, human