Adult presentation of metanephric stromal tumor.

Abstract

A 53-year-old woman presented with right upper quadrant pain and biliary colic. Ultrasound showed multiple gallstones and a solid cystic mass in the right kidney. Computerized tomography of the abdomen confirmed the presence of a central contrast enhancing mixed solid cystic mass with mural calcifications (fig. 1). No adenopathy was noted. The patient denied a history of flank pain, nephrolithiasis, gross hematuria, voiding symptoms, bone pain, fever, chills or weight loss. Medical history was negative for hypertension, and family history was negative for renal disease. Bone scan, chest x-ray, urine cytology and urinalysis were negative. Excretory urography demonstrated no filling defects in the collecting system. Given the solid nature of the tumor, its central location and the presence of a normal contralateral kidney, right laparoscopic radical nephrectomy and concomitant laparoscopic