Influence of body mass index on prognosis in gynecological malignancies

Cancer Causes Control. 2008 Nov;19(9):909-16. doi: 10.1007/s10552-008-9152-7. Epub 2008 Apr 8.


Objective: To evaluate the effect of obesity on the presentation and course of disease in patients with gynecological cancers.

Study design: Records of patients with endometrial (n = 1180), cervical (n = 738), and ovarian cancer (n = 824) treated between 1986 and 2005 were reviewed. Body mass index (BMI) was analyzed in relation to tumor stage, tumor grading, and prognosis. Steroid hormone receptor status and growth fraction (MIB1; Ki-67-antigen) of tumors in relation to BMI were analyzed in subgroups with endometrial (n = 183) and advanced ovarian (n = 221) cancers. In the latter subgroup, tumor vascularization (CD31) and expression of bcl-2, c-erb-B2, fibronectin, and tumor markers (CA-125, CA15-3, CEA) were also evaluated. Statistical analyses included bivariate correlation, cross-tabulation, Kaplan-Meier-survival analyses, and multifactorial residual survival analyses.

Results: Obese patients with endometrial carcinoma were significantly younger (p < 0.001) and their tumors were less advanced at diagnosis (p = 0.001) and were better differentiated (p = 0.010). In the subgroups, neither steroid hormone receptor status nor MIB1-determined growth fraction correlated with BMI. For both endometrial and cervical carcinomas, a high BMI influenced overall survival favorably (p (endometrial )= 0.004 and p (cervical )= 0.026). In ovarian cancer, there was a trend toward improved survival in more obese patients (p = 0.053). Immunohistochemistry revealed that c-erb-B2 expression was slightly lower in tumors of obese patients (r = -0.142; p = 0.039), but BMI did not influence any other factor.

Conclusions: Although obesity increases the incidence of cancer, a high BMI does not seem to adversely influence the prognosis in patients with the mentioned gynecological malignancies.

MeSH terms

  • Adult
  • Aged
  • Body Mass Index*
  • Cohort Studies
  • Female
  • Genital Neoplasms, Female*
  • Humans
  • Kaplan-Meier Estimate
  • Middle Aged
  • Obesity
  • Prognosis
  • Registries*
  • Retrospective Studies