Renal Schwannoma: Unraveling a Rare Tumor With Diagnostic Insights

Schwannomas are rare nerve sheath tumors arising from Schwann cells. In general, schwannomas are more commonly seen in the head, neck, and extremities, along the cranial and peripheral nerves. Retroperitoneal schwannomas are rare and very few cases are reported in the literature. Here, we describe a case of renal schwannoma which presented as a progressive right renal mass and the diagnosis was confirmed histopathologically. The patient remained asymptomatic throughout the entire disease course, and the surveillance imaging aided in the early identification of the disease progression. In this case report, we detail the patient's presentation, characteristic imaging findings, and histopathologic findings.