I'm sorry for the request for clarification. You mean a leiomyoma, a leiomyoma with sclerosis or a myofibroblastic lesion? Could not you put a picture of histology of the tumor? If you did immunohistochemistry what are the results with particular reference to desmin.
Although the precise site of the tumor: in didymus surrounded by seminiferous tubules, in contact with the tunica albuginea, in the region of the epididymis?
Attached some cases of intratesticular leiomyoma. Sorry again for the questions, but perhaps you would be able to help you better. Maurizio