Subcutaneous gluteal metastasis from gastric cancer: case report and clinicopathologic analysis of 50 Japanese patients

Skin metastasis from gastric cancer is rare. We report a case of gluteal skin metastasis from gastric cancer. A 74-year-old woman underwent curative gastrectomy for advanced gastric cancer. Thirty-six months after surgery, follow-up abdominal computed tomography showed a subcutaneous gluteal tumor, and surgical extirpation was performed. Histopathologic examination of the resected tumor revealed poorly differentiated adenocarcinoma, coinciding with the histopathologic diagnosis of the resected gastric cancer. Further systemic evaluation revealed a lung metastasis and left supraclavicular lymph node metastasis. The patient was treated with chemotherapeutic reagents. However, she died of the disease 9 months after the diagnosis of skin metastasis. We reviewed the cases of 50 Japanese patients with skin metastasis from gastric cancer and analyzed the clinicopathologic features.