Unknown Soft Tissue Tumor #1

    A 31-year-old male presents with a non-healing, swollen, painless, ulcerated nodule on the dorsum of the right foot. The patient reports that the lesion initially presented at least 2 years ago as a subcutaneous nodule.


    Clinical differential diagnosis:


    1.     Ulcer, with or without infection


    2.     Squamous cell carcinoma


    3.     Adnexal Tumor

    What is your diagnosis? (Pathologic differential diagnoses):


    a)     granuloma annulare


    b)     epithelioid sarcoma


    c)     synovial sarcoma


    d)     squamous cell carcinoma


    e)     epithelioid hemangioendothelioma