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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.