Omental cyst--a rare entity.

A case of omental cyst in a young girl who presented with distension and a lump in abdomen and having difficulty in micturition is reported. Pre-operative diagnosis was achieved by ultrasonography. An exploratory laparotomy with excision of cyst was done and histopathologic examination of the specimen confirmed the diagnosis. The postoperative course was uneventful. The aetiopathogenesis, special features of the disease and review of literature is discussed.