Isolated complex renal cyst mimicking kidney mass.

Hydatidosis is an endemic parasitic disease in Mediterranean region, Middle east, Australia, parts of Africa, Latin America and Turkey. The cysts are mostly evident in the liver or lungs, while urinary tract involvement is uncommon, comprising only 2-4 % of all cases. Isolated renal involvement is extremely rare.

Atypical presentations of retroperitoneal giant schwannomas.

Schwannomas are usually benign rare tumors that originating from Schwann cells of peripheral nerve sheaths. Presentation is generally varied and changed in a non-specific range from abdominal mass, flank pain to incidental findings. Herein we report 2 cases of retroperitoneal giant schwannomas with different clinical presentations, of whom one presented with vague abdominal pain, palpable abdominal mass for 4 years, swelling and bilateral hydronephrosis that caused by giant abdominal mass; the other one presented with right flank pain, rectal hemorrhage and lower extremities edema.