Primary ovarian lymphoma: report of cases and review of literature.

Primary female reproductive system lymphomas are distinctly uncommon. We report two cases with primary ovarian non Hodgkin's lymphoma (NHL) having unilateral involvement in one case while the other had bilateral ovarian involvement. Both cases initially presented with ovarian enlargement. The median size of the tumour was 5.8 x 5 cm2. Histologically, by using the WHO classification, one lesion was classified as diffuse small B cell phenotype of intermediate grade and the other as diffuse high grade, B cell phenotype. On the basis of staging studies and clinical follow up, we conclude that both of the neoplasms in the report arose in the ovary. Both of the patients are disease free at 24 months and 6 months of follow up respectively, following excision and chemotherapy. We conclude that that the complete remission and failure free survival of patients with ovarian NHL treated with appropriate treatment appear to be similar to that of patients with extranodal NHL.