Plasma cell granuloma of the bladder: a case report

Plasma cell granuloma of the lung has been reported often but extrapulmonary cases are rare. A case of plasma cell granuloma of the bladder involving the omentum is reported. Transurethral biopsy of the bladder did not aid in diagnosis because the lesion was deeply seated, and differential diagnosis with hematoxylin and eosin staining was difficult due to atypical plasma cells. Immunohistochemistry established the final diagnosis.