[A case of fibrous pseudotumor arising from the paratesticular area]

Intrascrotal fibrous pseudotumor is rarely observed, and only 40 cases have been reported in Japan. A 65-year-old male patient visited this hospital due to a painless right scrotal mass. Computed tomography demonstrated a solid mass with a cystic component ; however, the exact location of the mass in relation to other scrotal contents was not determined. Intraoperative findings revealed a solid mass, 2 cm in diameter, in the tunica vaginalis. The mass could not be dissected from the epididymis ; therefore, high orchiectomy was indicated. A histopathological diagnosis of fibrous pseudotumor was made. The patient's postoperative course was uneventful, and no recurrence has been found. It is difficult to make a diagnosis of paratesticuler tumor based on preoperative radiological results and even macroscopic observation during surgery. We strongly recommend that it is necessary to undergo high orchiectomy for a fibrous pseudotumor in which dissection from the peripheral tissue is very difficult since it may involve various types which may lead to a diagnosis of malignancy.