Solitary intrascrotal neurofibroma: a case diagnosed on aspiration cytology.

Solitary neurofibroma of the scrotum is exceedingly rare and very few cases of this unusual occurrance have been reported till date. None of the previously reported cases had a preoperative cytologic diagnosis. A young man presented with an eight-month history of right scrotal swelling. Fine-needle aspiration cytology showed a spindle cell tumor with fibrillary matrix and wavy slender nuclei. A cytologic diagnosis of benign nerve sheath tumor was rendered. The patient underwent surgical excision of the mass and histopathologic examination confirmed the diagnosis of a neurofibroma. This case is the first reported instance of aspiration cytologic diagnosis of intrascrotal neurofibroma. This rare tumor should be considered in the cytologic differential diagnoses of testicular and paratesticular tumors.