Polypoid Malignant Melanoma with Spontaneous Decapitation Showing Favorable Prognosis: A Case Report. - Ikuno, Yasuaki; Kokubu, Hiraku; Kato, Miwa; Okada, Kazuma; Yamaguchi, Akihiko; Takahashi, Toshifumi; Kato, Takeshi; Fujimoto, Noriki (Case Reports in Oncology, 2023)