A Rare Case of Invasive Malignant Melanoma Metastasis in the Vulvar Mucosa 11 Years After Diagnosis and Treatment.

Mucosal melanoma is rare and the occurrence of an invasive malignant melanoma metastasis 11 years post-initial diagnosis is equally uncommon. This is a case of a 66-year-old woman with a history of bilateral vulvar invasive melanoma, who presented with an enlarging inguinal mass with associated tenderness upon palpation. After a right inguinal excisional lymph node biopsy, the pathological findings determined the final diagnosis as metastatic melanoma.