A 60-year-old female patient presented two round shaped 3*3 cm sized erythematous subcutaneous masses with tenderness on the scalp. Clinically, there were possibilities of epidermal cyst, pilomatricoma or hemangioma. Skull AP/Lateral x-ray indicated neither remarkable findings nor bony relationship. Hemangioma on the frontal scalp, epidermal cyst or pilomatricoma on the right temporal scalp were adduced by ultrasonography. But, biopsies at both lesions exhibited anastomosing vascular structures with dense bizarre, atypical CD 31 positive malignant cell proliferation. We diagnosed the patient with scalp angiosarcoma. PET-CT revealed FDG uptake on soft tissue masses in the frontal and right temporal scalp without regional lymphadenopathies. In addition, there was a high FDG-uptaked mass in sigmoid colon, but additional colonoscopy showed no mucosal malignancies. Unfortunately, the patient refused all treatments such as excision, chemotherapy and radiotherapy. Cutaneous angiosarcoma is a rare malignant tumor of endothelial origin with a poor survival rate. There are many clinical misdiagnoses including benign dermatoses because of delayed clinical suspicion and limitation of non-histological diagnostic tools. Therefore, histopathologic confirmation and immunohistochemical assays should be performed.