A 16-year-old male with free medical history presented as an outpatient requesting for consultation regarding a small lump that he palpated two months ago in his right hemiscrotum during self-examination. He did not report any trauma or inflammation of the area neither at the referred period nor in the past. Except for mild discomfort in the hemiscrotum during exercise that subsided after its discontinuation, no other symptoms were reported. Importantly, the size of the lump did not change significantly during this two-month period.\nPhysical examination revealed a small, round, hazelnut-sized, painless mass in the right hemiscrotum, localized in the tail of the epididymis. No other pathological signs were detected at the rest of the scrotum, testicles, or groin.\nU/S examination of the scrotum documented the presence of a solid hypoperfused, hyperechoic, well-demarcated, without invasive behavior mass, localized at the tail of the epididymis, 1.3 × 1.1 cm in size, and including 2 small hypoechoic lesions inside the mass (arrows, ).\nThe typical preoperative laboratory examination (blood routine and coagulation profile) and the values of the specific tumor markers AFP, LDH, CEA, and b-HCG were normal. Surgical treatment was decided and a right scrotal exploration was performed. Macroscopic examination revealed a yellowish uncapsulated mass with maximum diameter of 13 mm located next to the tail of the epididymis ().\nAfter meticulous dissection, the mass was totally dissociated from the epididymis and was excised en-block without any damage to adjacent structures.\nHistological examination of the mass revealed the presence of cuboidal epithelial cells in tubular clusters into a fibrous stroma (). Immunohistochemical evaluation was positive for tumor markers HMBE1 and calretinin, which documented the diagnosis of adenomatoid tumor and its mesothelial origin.\nPostoperative course was uneventful. After a 24-month follow-up period, the patient remains asymptomatic without signs of recurrence.
A 32-year-old man form the Indian subcontinent presented to the emergency department 2 days after having been kicked in the scrotum during a football match with increasing pain and swelling of the right hemiscrotum. A firm discrete mass was noted at the lower pole of the right epididymis that was clinically inseparable from the otherwise unremarkable testicle. The right testicle was nontender and sat in a normal position with no signs of scrotal skin ecchymosis. The history suggested that the scrotal mass had been present for approximately 12 months, and a preliminary diagnosis of a haemorrhagic cyst caused by trauma was made. Initial management included scrotal support, analgesia, and a follow-up magnetic resonance imaging (MRI) scan. The MRI confirmed a 2.3 cm irregular lesion arising posterior to the lower pole of the right testis that enhanced peripherally with central necrosis and therefore could not rule out a potentially malignant lesion (). After informed consent, a scrotal exploration and epididymectomy was performed. Grossly, the specimen measured 25 mm in maximum diameter. Sectioning revealed a 20 mm yellow, partly necrotic tumour mass ().\nHistological examination (H+E) showed a central area of coagulative necrosis with surrounding reactive fibroblastic tissue and inflammation (). Irregular clusters and solid nests of viable epithelioid cells were present, partly obscured by the fibroblastic tissue reaction ().\nOn immunohistochemical staining, these epithelioid cells were positive for CAM5.2 and CK7 and also expressed the mesothelial markers calretinin and WT1 (). The H+E appearances and immunoprofile were consistent with a partly necrotic/infarcted adenomatoid tumour. No evidence of malignancy was seen. The tumour was well circumscribed and completely excised at all margins. The patient was informed of the results, reassured, and discharged from further followup.