Malignant melanoma with liver, stomach, and duodenal metastasis.

Malignant melanoma (MM) is a common and highly invasive malignant tumor in clinical practice that is prone to occur in the skin and mucosa and prone to early metastasis. The common sites of metastasis are the liver, lungs, brain, etc. Metastatic gastrointestinal mucosa is relatively rare. Once metastasis occurs, the prognosis of patients is significantly worse. This article reports a case diagnosed as MM with liver, stomach, and duodenal metastasis by ultrasound-guided endoscopic puncture at Fengdu People's Hospital in Chongqing, with gastrointestinal discomfort as the initial symptom and a history of melanoma. Therefore, when a patient has a history of melanoma surgery and presents with digestive symptoms, it is necessary to consider the disease. Regular endoscopic screening should be performed, and early surgical treatment and postoperative chemotherapy combined with targeted therapy may improve patient prognosis and prolong patient survival.