We review the cases of mucosal malignant melanomas diagnosed at the Seoul National University, Department of Pathology between 1970 and 1983. Among 73 cases of malignant melanomas 27 cases arised fram mocosa. The incidence of mucosal malignant melanoma in this study was much higher when compared to that of Caucasians. Thirty-three percent of mucosal malignant melanoma had metastatic lesion at the time of first operation, which ia much lower than the incidence of metastasis in patients with cutaneous melanomas. The predilection sites of mucosal melanoma included oral cavity, conjunctiva and rectum. The conjunctival melanoma was distinguished from the rectal melanoma by the small size, short history, young age and lower incidence of metastasis.
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