Diagnostic utility of CD10, CD3 and electron microscopy of renal cortical neoplasms with oncocytic features.

No currently defined imaging techniques can reliably distinguish between oncocytoma and epithelial malignant lesions with oncocytic features in the kidney; therefore, patients must undergo resection or, in certain circumstances, biopsy to definitively establish diagnosis. Immunohistochemical staining for CD10 and CD3, evaluation of the staining pattern and intensity, and relevant morphologic appearance are helpful diagnostic tools in discriminating between renal cell carcinoma with oncocytic features and renal oncocytoma. Electron microscopy confirms different ultrastructural components of each neoplastic cell type and correlates with immunohistochemical findings.

Micropapillary urothelial carcinoma: clinico-pathologic review.

Micropapillary carcinoma is a rare distinct variant of high grade urothelial carcinoma, which has specific morphological characteristics and is almost always associated with muscularis propria and vascular invasion. No currently defined imaging techniques can reliably diagnose some types of deeply invasive urothelial carcinoma of urinary bladder, in particular its micropapillary variant. Therefore, the pathological findings are crucial in making the diagnosis.

Synchronous primary carcinoid tumor and primary adenocarcinoma arising within mature cystic teratoma of horseshoe kidney: a unique case report and review of the literature.

Background: Malignant transformation of mature cystic teratoma is a rare complication. While any of the constituent tissues of a teratoma has the potential to undergo malignant transformation, squamous cell carcinoma is the most commonly associated malignancy. Renal carcinoid tumors are rare and frequently associated with horseshoe kidney and renal teratoma.

Case of a concurrent renal mass and extragonadal retroperitoneal teratoma.

The presentation of a synchronous renal cell carcinoma (RCC) and germ cell tumor (GCT) is rare. We report the case of a 57 year-old male who presented with a right renal mass and retroperitoneal lymphadenopathy. He underwent a successful right partial nephrectomy and retroperitoneal lymph node dissection, and the subsequent pathology revealed a stage I clear cell RCC and a retroperitoneal teratoma with a component of benign prostatic tissue.