- The differential of Dx: ischemic arterial ulcer.
- vasculitis,
- pyoderma gangrenosum,
- arterial ulcerations,
- infection,
- trauma,
- skin cancer,
- arachnid bites
- sickle cell anemia.
- When the diagnosis is in doubt: a punch biopsy from the border (not base) of the lesion may be helpful.
- Reference from CMDT (61st Ed), Pg no: 158