INTRODUCTION Soft-tissue perineuriomas are rare benign peripheral nerve sheath tumors in the subcutis of the extremities and the trunks of young patients. To our knowledge, this the first presentation of the computed tomography and magnetic resonance imaging of a soft-tissue perineurioma in the retroperitoneum with pathologic correlation. CASE PRESENTATION A 63-year-old Japanese man was refer...

Ectopic spleen is an autotransplantation of splenic tissue after traumatic rupture of the spleen or a splenectomy. Clinically, since most splenosis patients have no obvious symptoms and the condition is usually detected during accidently physical examination. Splenosis is easy to be misdiagnosed as a tumor, leading to unnecessary surgical treatment. Multiple splenosis growing in the right thora...