Primary ovarian lymphoma in a child.

Ovarian tumour is rarely seen in paediatric age group and primary ovarian non-Hodgkin's lymphoma is very uncommon. A child presenting with acute abdomen was detected to have bilateral solid ovarian tumours. Because of torsion of the right ovarian tumour and complete replacement of the ovarian tissue by the tumour on left side, bilateral salpingo-oophorectomy was done. Bilateral primary ovarian lymphoma was diagnosed on histopathological examination. Immunohistochemistry was suggestive of B-cell lineage. She had eight cycles of chemotherapy and at 28 months follow-up doing well without any sign of any recurrence or any evidence of metastasis.