Metastatic chromophobe renal cell carcinoma to the brain

This report documents an unusual case of a patient with a chromophobe renal cell carcinoma presenting with a brain metastasis. A 58-year-old man presented with stroke-like symptomatology, including expressive aphasia, right side facial weakness, headaches and vomiting. CT imaging demonstrated a 4.7cm left frontal lobe hemorrhagic mass. He underwent surgery with excision of the mass, which was marked by sheets of large cells with lightly eosinophilic to clear cytoplasm. PAX8 staining was positive and a diagnosis of clear cell carcinoma of probably renal origin was rendered. Subsequently, CT imaging of the abdomen revealed a 12.9cm left renal mass. The patient underwent a left nephrectomy and a diagnosis of chromophobe renal cell carcinoma was made. The tumor was noted to extend into the perirenal fat and to have involved a paraaortic lymph node. Re-review of the frontal lobe lesion confirmed the tumor was the same. Chromophobe renal cell carcinomas are far less common than clear cell tumors, are less likely to metastasize, and generally have a more favorable overall prognosis. When they metastasize, they most commonly involve the liver, lung and lymph nodes, in contrast to the more common clear cell carcinomas that typically spread to the lungs, bone and brain.
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research

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