Surgical excision of a large retroperitoneal lymphangioma: A case report

Figure 1 The pre- and post-operative computed tomography scan of the patient. A: A retroperitoneal cystic mass on abdominal computed tomography (CT) scan; B and C: Follow-up CT scan in seven years from initial diagnosis showed significant increase in mass size (from 11 cm to 24 cm) with left hydronephrosis caused by external compression of cystic mass; D: Follow-up CT scan in one month after surgical excision showed complete removal of mass and decreased left hydronephrosis.

Figure 2 The gross and microscopic findings of the mass. A: Huge cystic mass before excision; B: The mass after excision; C: The microscopic feature which shows the cystic space and dilated lymphatic vessels lined by flattened endothelium consistent with lymphangioma.