Cystic Nephroma: A Case Report and Comparing Literature Review with Mixed Epithelial and Stromal Tumor of Kidney

Cystic nephroma (CN) is a benign cystic neoplasm composed of mixed epithelial and stromal elements. Less than 200 cases have been reported. We had a patient, a 41-year-old woman, who had a huge typical CN. The patient was admitted for a right renal mass that was found incidentally. On laparaoscopic right nephrectomy, there was an encapsulated 7 cm multilocular cystic mass at the upper pole. Microscopically, the cystic wall was lined by a single layer of low cuboidal or hobnail epithelium without a solid area. The thin septa were composed of bland, ovarian type spindle cells. The main differential diagnoses were mixed epithelial and stromal tumor (MEST), low grade multilocular renal cell carcinoma, and tubulocystic carcinoma. The results of immunohistochemical staining were cytokeratin 7/19(+/+) and CD10(-) in lining epithelium, estrogen receptor/progesterone receptor(+/+) in stromal cells. After surgery, she was free of recurrence for 10 months. We report this rare case and compare it with other cystic renal tumors, especially MEST.

Successful systemic thrombolysis of both the inferior vena cava and a renal vein thrombi that complicated nephrotic syndrome / 대한내과학회지

Nephrotic syndrome has been considered a hypercoagulable state because thromboembolic events of the venous or the arterial circulations occur on occasion. There are various risk factors for thromboembolism in patients with nephrotic syndrome (membranous nephropathy, severe hypoalbuminemia, hemoconcentration and medications such as steroid and diuretics). As thromboembolism is often fatal, early detection and proper management are important. Although anticoagulation is the preferred therapy, thrombolysis may be considered for an extensive thrombosis, for inferior vena cava (IVC) thrombosis, for recurrent pulmonary thromboembolism and for bilateral renal vein thrombosis in conjunction with acute renal failure. We report here on a case of renal vein and IVC thrombosis in a 24-year-old male with nephrotic syndrome, and this patient was treated with intravenous thrombolytics rather than anticoagulation and local thrombolytic infusion. He complained of left flank pain and his CT scan revealed left renal vein thrombosis and IVC thrombosis. After urokinase infusion, his thrombi were resolved successfully without bleeding complications.