An 18 year old female presented with vaginal bleeding at 2 months of gestation. Ultrasonography revealed a large retroperitoneal cyst. Histopathological examination of the excised cyst showed features suggestive of a cystic adrenal lymphangioma. This case is reported because of its rarity and detection during pregnancy.

Key Words: Retroperitoneal cyst, adrenal cystic lymphangioma