Angiomyofibroblastoma-like tumour of the scrotum is a rare, well-defined, slow growing mesenchymal extratesticular nonepididymal tumour rarely seen in the perineum or scrotum of older male patients. A similar tumour can occur in females in the vulval region.
In males, they are seen in middle aged to elderly patients between age 45 and 75. In the majority of cases it has an indolent and nonaggressive clinical course; however, focal invasion and recurrence have been reported.
These tumours appear as superficial well-circumscribed masses with a greyish white to yellowish brown colour.
Angiomyofibroblastoma-like tumours of the scrotum demonstrate high vascularity and perivascular fibrinoid hyalinisation. The tumour cells are spindle cells with minimal atypia and a low mitotic rate. A small amount of fat is seen in 25-56% of cases.
Positive for vimentin and negative for S100, actin, and CD34.
Heterogeneous echotexture, isoechoic to the surrounding tissue and subcutaneous fat.
Well-circumscribed homogeneous subcutaneous oval mass, possibly with several small internal hypodense foci.
- T1: low due to high fibrous content
- T2: intermediate heterogeneous signal
Intense postcontrast enhancement due to high vascularity of the lesions.
Treatment is wide surgical resection to reduce recurrence rate.
In the scrotum, the differential includes rare lesions such as:
- 1. Wolfman DJ, Marko J, Gould CF et-al. Mesenchymal Extratesticular Tumors and Tumorlike Conditions: From the Radiologic Pathology Archives. Radiographics. 2015;35 (7): 1943-1954. doi:10.1148/rg.2015150179 - Pubmed citation
- 2. Ding G, Yu Y, Jin M et-al. Angiomyofibroblastoma-like tumor of the scrotum: A case report and literature review. Oncol Lett. 2013;7 (2): 435-438. doi:10.3892/ol.2013.1741 - Free text at pubmed - Pubmed citation