GIANT SOLITARY CUTANEOUS ANGIOSARCOMA OF THE FOREARM OCCURRING OUTSIDE THE SETTING OF LYMPHEDEMA

Angiosarcoma (AS) is an aggressive vascular malignancy that can affect various anatomic sites. Although rare, cutaneous angiosarcoma (CAS) is the most common clinical manifestation of AS, accounting for approximately 50% to 60% of all AS. CAS is typically known to occur in three settings: (1) idiopathic, (2) following radiation treatment, or (3) is classically diagnosed following mastectomy with subsequent chronic lymphedema (known as Stewart Treves syndrome). We present a case of CAS on the forearm in a man with no history of lymphedema or radiation therapy, highlighting the necessity to discuss this diagnosis even outside the setting of conventional angiosarcomas.