Adrenal Schwannomas: Rare Tumor of the Retroperitoneum

Abstract EN

Schwannoma is a benign neurogenic tumor originating from Schwann cells.

These produce the myelin sheath that covers peripheral nerves that are often affected.

This latter localization is extremely rare, and only a few case reports can be found in the medical literature.

Studies have shown that approximately 0.5% to 5% of schwannomas are retroperitoneal, constituting 0.2% of adrenal incidental tumors.

These usually present as incidental findings, nonsecreting adrenal masses in asymptomatic patients.

Diagnosis of a schwannoma is based on detection of spindle cells with Antoni A and Antoni B regions in histological sections and positive staining for S-100 protein by immunohistochemical analysis.

We report a case of an incidentally identified during an abdominal ultrasound examination with schwannoma localized in the left adrenal gland.