Rectus sheath hematoma (RSH) is an increasingly common clinical condition in our hospitals due to the increasing use of anticoagulant therapies for various purposes among our patients. Treatment of spontaneous RSH is generally conservative. For continued bleeding, interventional radiologic identification and subsequent embolization is an effective option. Surgery usually involves significant mo...

Percutaneous renal surgery (PRS) is the established procedure to treat several renal conditions, such as large renal stones, ureteropelvic obstruction, and upper tract transitional cell carcinoma. Complications, including urinary tract infections, bleeding necessitating transfusion, extravasation, and transient ureteral obstruction, are uncommon. Other well described complications are pneumotho...

Fat necrosis (FN) is a common surgical complication after breast and plastic surgery procedures involving reconstruction and tissue flaps with an incidence reported ranging from 10 to 39%.1 Histologically, FN is described as a focus of lipid-laden macrophages and chronic inflammationwith a foreign body giant cell reaction.2 FN in breasts has a variable clinical presentation that can range from ...

Extraskeletal osteosarcoma is an uncommon high-grade malignant soft tissue sarcoma. Well-differentiated extraskeletal osteosarcoma is thought to have a better prognosis than classical extraskeletal osteosarcoma, but dedifferentiation after recurrence has also been reported. We present a case of a primary retroperitoneal extraskeletal osteosarcoma in a 62-year-old Japanese woman. Abdominal CT re...

Enteric duplication cysts (EDCs) can occur in any portion of the alimentary tract, but are most commonly associated with the small bowel and esophagus. Retroperitoneal location is really unusual. This 19-year-old female was in excellent health, but a week's abdominal pain made her search for a doctor's help. After the detailed examination, surgical intervention was performed under the impressio...

A 76-year-old Japanese man was admitted to Kosei-Nenkin Hospital (Osaka, Japan) in November 2006; his chief complaint was a 10-kg loss in body weight over 3 months prior to admission. Abdominal computed tomography (CT) and dynamic magnetic resonance imaging (MRI) showed three masses in the retroperitoneum. The patient subsequently underwent surgery. The final histopathological diagnosis of tumo...