Melanocytic Lesions and Disorders of Pigmentation Obgyn Key Non melanotic subcutaneous nodules on the trunk, arms, scalp and face Download Scientific Diagram Frontiers The WHO 2018 Classification of Cutaneous Melanocytic Neoplasms: Suggestions From Routine Practice Brown spots, especially on the lips, can be alarming to some. In some instances it can indicate rare oral mucosal melanoma, however in this case it was a non cancerous labial melanotic macule. Rare Forms of Melanoma and Melanocytic Tumors IntechOpen