title: Population-based Analysis of the Clinical Features of Primary Small Cell Carcinoma of the Ovary.
abstract: BACKGROUND
  Primary small cell carcinoma of the ovary (SCCO) is rare, making prognosis and outcomes largely undefined.
  
  
  METHODS
  Using case listing session of SEER 18 (1973-2010), we examined outcomes for patients with SCCO. Analyses were conducted with SEER(*)Stat 8.1.2, Microsoft Excel 2007 and GraphPad Prism 6. Comparisons were made using the Chi-square test and log-rank test (Mantel-Cox) and all p-values were 2-sided.
  
  
  RESULTS
  One hundred and eighty-one patients with SCCO with staging information were identified with a median age of 37 (range=10-91). Twenty-nine patients (15%) had localized, 19 (11%) regional and 133 (74%) distant disease at presentation. All patients with localized and 95% of patients with regional disease had surgery. The extent of surgery did not influence outcomes. Median overall survival (OS) varied by stage (67 months vs. 12 months vs. 9 months, p<0.001). Radiation was rarely used in localized (1 patient) or regional disease (3 patients). For comparison, 81,933 cases of SCLC were identified from the same database with a median age of 68; 8% of small cell lung cancer (SCLC) patients had localized, 29% regional and 63% distant disease. Outcomes were superior for patients with SCCO with localized disease (67 months vs. 16 months, p<0.001) but there was no clinically meaningful difference in patients with regional (12 months vs. 13 months, p=0.675) or distant disease (9 months vs. 7 months, p<0.001).
  
  
  CONCLUSIONS
  SCCO presents at a younger age than SCLC but has a similar stage distribution. Patients with localized SCCO have a more favorable prognosis than patients with SCLC but patients with regional and distant disease have similar outcomes.
authors.affiliation: Department of Internal Medicine, University of Tennessee Health Science Center, Memphis, TN, U.S.A. omerjamy@gmail.com.
authors.forename: Omer
authors.initials: O
authors.lastname: Jamy
authors.affiliation: Department of Hematology/Oncology, The West Clinic, University of Tennessee Health Science Center, Memphis, TN, U.S.A.
authors.forename: George
authors.initials: G
authors.lastname: Yaghmour
authors.affiliation: Department of Internal Medicine, University of Tennessee Health Science Center, Memphis, TN, U.S.A.
authors.forename: Felicia
authors.initials: F
authors.lastname: Hare
authors.affiliation: Department of Hematology/Oncology, The West Clinic, University of Tennessee Health Science Center, Memphis, TN, U.S.A.
authors.forename: Michael G
authors.initials: MG
authors.lastname: Martin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018288:Carcinoma, Small Cell / Q000401:mortality / Q000473:pathology* / Q000628:therapy; D002648:Child; D005260:Female; D006801:Humans; D008875:Middle Aged; D009367:Neoplasm Staging; D010051:Ovarian Neoplasms / Q000401:mortality / Q000473:pathology* / Q000628:therapy; D010053:Ovary / Q000473:pathology*; D011379:Prognosis; D012189:Retrospective Studies; D055752:Small Cell Lung Carcinoma / Q000453:epidemiology / Q000473:pathology*; D016019:Survival Analysis
keywords: Small cell ovarian carcinoma; lung cancer