This dark spot on the patients back was confirmed to be a mildly atypical compound melanocytic naevus. , What does this mean?, A mildly atypical compound melanocytic nevus is a benign Benign melanocytic naevi 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. Common types of moles