<unk>  may present as a purple discoloration or a tender skin nodule in the extremity, typically on the anterior surface. It progresses to an ulcer with crusting to an extensive necrotic focus involving the skin and subcutaneous tissue. It metastasizes quickly.
Lymphangiosarcoma
Angiosarcoma
Hemangiosarcoma
Glomangiosarcoma
Angiokeratoma
Liposarcoma
Lymphangioma
Pyogenic granuloma