Abstract
Schwannomas are benign tumors mostly found in the head and neck regions. Localization in the retroperitoneal area is rare. We report a case of a 19-year-old male presented to our department complaining of right abdominal pain. An abdominal computed tomography (CT) scan showed a large retroperitoneal mass of 17 cm in diameter. The patient had an ultrasound-guided needle biopsy of the mass and histopathology and immunohistochemistry revealed a schwannoma. Tumor excision was performed through lumbotomy. Histopathological examination confirmed the diagnosis of benign schwannoma. After three years, at follow-up the patient was free of disease. Retroperitoneal schwannoma is a difficult clinical diagnosis and requires a high index of suspicion. Magnetic resonance imaging scan may help in the diagnosis of schwannoma and diagnosis is based on histopathologic examination and immunohistochemistry. Total excision has a therapeutic effect and a good prognosis.
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