Abstract
RATIONALE: Angiosarcoma is a mesenchymal soft tissue sarcoma with a tendency for vascular endothelial differentiation. It is highly malignant with a poor prognosis but has a low incidence. Epithelioid angiosarcoma of the gastrointestinal tract is rare, and simultaneous multiple lesions of the stomach and small intestine are even rarer. It is easy to be misdiagnosed clinically. We report on a case of preoperative misdiagnosis of gastric cancer and postoperative diagnosis of epithelioid angiosarcoma with multiple lymph node metastases. PATIENT CONCERNS: A 75-year-old patient who was admitted to the hospital because of fatigue, melena and dysuria for >1 month. DIAGNOSIS, INTERVENTIONS AND OUTCOMES: Gastroscopy revealed gastric fundus ulcer and the biopsy revealed poorly differentiated adenocarcinoma of the fundus. We performed a radical gastrectomy for gastric cancer during which multiple ulcers were found in the jejunum and resected. Postoperative pathology showed multiple epithelioid angiosarcoma in the stomach and small intestine with lymph node metastases. The patient did not receive further treatment and died 2 month after the surgery. LESSONS: Gastrointestinal epithelioid angiosarcoma is one of the differential diagnoses of gastrointestinal adenocarcinoma and surgery is the main treatment. The lymph nodes are one of the main sites of metastasis.