Primary Malignant Melanoma of the Esophagus in a 76-Year-Old Female.

Mucosal melanomas represent about 1% of all melanoma cases. Primary malignant melanoma of the esophagus (PMME) is a rare and deadly condition, with only about 339 cases reported in the literature. Esophageal melanoma usually presents with progressively worsening dysphagia, and patients often present late in the disease course. Esophageal melanoma can be treated with surgical resection, chemotherapy, targeted therapy, or immunotherapy depending on the stage and tumor mutations. However, due to the rarity of the disease, no trials have been performed to deliver a gold standard of treatment. We present the case of a 76-year-old female who was diagnosed with metastatic primary malignant melanoma of the esophagus and underwent treatment with nivolumab, a PD-1 receptor antagonist.