Cutaneous angiosarcoma masquerading as photodermatitis: a case report.

Angiosarcoma (AS) is a rare and aggressive soft tissue sarcoma originating from endothelial cells, with cutaneous manifestations often seen in the head and neck region. Despite its rarity, AS poses significant diagnostic challenges due to its variable presentation and ability to mimic other dermatological conditions. We report the case of an 87-year-old female that presented with a 4-month history of an asymptomatic nodule on her neck, which rapidly progressed into an indurated plaque spreading to her face, chest, and scalp. Initially misdiagnosed as cellulitis and dermatitis, the lesion was unresponsive to antibiotics and steroids. Imaging showed extensive infiltration in the neck, precluding surgical resection. This case underscores the diagnostic difficulty of AS, which can be mistaken for benign skin conditions. Despite a multidisciplinary approach, the prognosis for AS remains poor, with a 5-year survival rate of approximately 35%. Treatment options include surgery, radiation, chemotherapy, and immunotherapy tailored to the patient's condition and tumor characteristics.