Embryonal Rhabdomyosarcoma of the Tunica Dartos in the Scrotum

Abstract

We report 2 cases of embryonal rhabdomyosarcoma, a rare malignant tumor, arising from the tunica dartos in the scrotum. Sonography revealed that each tumor had clear boundaries, a complete capsule, abundant blood flow, and an internal hypoechoic signal. Patients with embryonal rhabdomyosarcoma who have suspected lymph node metastases or distant metastatic lesions should undergo computed tomography. Our 2 cases were confirmed by subsequent histopathologic diagnosis and immunohistochemical staining with desmin and myogenin. The 2 patients were treated surgically with radical excisions and chemotherapy but without radiotherapy. To our knowledge, no cases of embryonal rhabdomyosarcoma originating from the scrotal tunica dartos have previously been reported in the medical literature.

Sonography of Scrotal Wall Lesions and Correlation With Other Modalities

“…Although extremely rare, primary tumors may arise from any of the mesenchymal structures within the scrotal wall. Both benign and malignant lesions have been described in the literature, usually as case reports . They present as palpable nontender nodules, which appear on sonography as solid vascularized lesions located within the layers of the wall.…”

“…Both benign and malignant lesions have been described in the literature, usually as case reports. 17,18 They present as palpable nontender nodules, which appear on sonography as solid vascularized lesions located within the layers of the wall. Unless they have invasive features, they are separated from intrascrotal structures ( Figure 13).…”