Ovarian epithelial tumors in Thai women: a histological analysis of 291 cases

A semiquantitative histological analysis on 291 epithelial tumors of the ovary in Thai women was done to assess the association between stromal invasion and a number of other histological features. Cribriform pattern, back-to-back growth, and epithelial stratification deeper than three cells were significantly related with stromal invasion in all types of ovarian epithelial tumors combined as well as in mucinous tumors alone. This finding suggests that the three histological characteristics serve as additional criteria of malignancy when unequivocal stromal invasion cannot be demonstrated. Histological classification of ovarian epithelial tumors in Thai women, together with age distribution, laterality, extraovarian spread, and some associated pathology, are presented and discussed.