title: Lateral distribution of ovarian dermoid cyst.
abstract: OBJECTIVE
  To determine the distribution of ovarian dermoid cysts in a large series of women.
  
  
  METHODS
  Observational study (Canadian Task Force classification II-3).
  
  
  METHODS
  University teaching hospitals.
  
  
  METHODS
  Three hundred thirty-six women.
  
  
  METHODS
  Evaluation of operative reports.
  
  
  RESULTS
  Dermoid cysts had a mean diameter of 5.6 cm. They were present in the right ovary (48.8 %), left ovary (37.8%), and bilaterally (13.4%). Unilateral cysts were more frequent in the right ovary (56.4%) than in the left (p = 0.002, odds ratio 1.7, confidence interval 1.2-2.3). This was significantly different from the expected 50% (4.45, chi2). A similar predisposition was found when we included women with bilateral cysts (p < 0.01, OR 1.5, CI 1.1-1.9). Patient age and size of cyst did not differ between those with left and right lesions.
  
  
  CONCLUSIONS
  In this large cohort of women, ovarian dermoid cysts had a predisposition to a right lateral location.
authors.affiliation: Department of Obstetrics and Gynecology, McGill University, Montreal, Quebec H3A 1A1, Canada.
authors.forename: Haya
authors.initials: H
authors.lastname: Al-Fozan
authors.forename: Jessica
authors.initials: J
authors.lastname: Glassman
authors.forename: Beni
authors.initials: B
authors.lastname: Caspi
authors.forename: Zvi
authors.initials: Z
authors.lastname: Appelman
authors.forename: Togas
authors.initials: T
authors.lastname: Tulandi
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003884:Dermoid Cyst / Q000453:epidemiology*; D005260:Female; D006785:Hospitals, University / Q000706:statistics & numerical data; D006801:Humans; D007557:Israel / Q000453:epidemiology; D010051:Ovarian Neoplasms / Q000453:epidemiology*; D011792:Quebec / Q000453:epidemiology; D013724:Teratoma / Q000453:epidemiology*