Metastatic malignant melanoma: A case of metastasis from foot to mandibular anterior region.

Metastatic malignant melanoma (MMM) of the oral cavity is extremely rare which generally presents in the setting of disseminated disease and have extremely poor prognosis. The most common site for MMM in the oral cavity is tongue followed by buccal mucosa for soft-tissue lesions and posterior mandible for bone involving lesions. Primary tumor sites of oral MMM are usually cutaneous lesions of the trunk, head and neck, limbs, and nasal septum mucosa. Patients bearing this diagnosis face median survival time of approximately 9 months with a probability of surviving 5 years after the initial presentation is <5%; hence, an early detection and treatment for the primary and metastatic lesion is crucial. Here, we present an unusual case of MMM of oral cavity involving gingiva and alveolar bone of the mandibular anterior region metastasizing from a primary lesion on the foot.