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