A woman had a primary pedunculated malignant melanoma. This is a rare form of presentation and may result in clinical confusion with seborrheic keratosis, fibroepithelial papilloma, or granuloma pyogenicum. The aggressive nature of the lesion was indicated by the presence of erosion and bleeding. Though the tumor cells were present only in the pedunculated mass, it had metastasized to regional lymph nodes at the time of surgery.
Niven J, Lubin J. Pedunculated Malignant Melanoma. Arch Dermatol. 1975;111(6):755-756. doi:10.1001/archderm.1975.01630180083012