Retroperitoneal filariasis diagnosed by fine needle aspiration: a case report.

Background: Filarial worms lodge anywhere, from body fluids to subcutaneous tissue, as various case reports prove.

Case: A 21-year-old Nepali male presented with bilateral groin swellings. Imaging studies showed dilated retroperitoneal lymphatics forming a mass, suggestive of lymphangioma or lymphangioleiomyoma.