结膜黑色素瘤罕见,大约为脉络膜黑色素瘤的1/40。主要分为局部结节性黑色素瘤和弥漫性或播散性黑色素瘤,后者又称后天性或癌前黑变病、癌前黑色素沉着症(连接型色素痣)、癌性黑色素瘤、播散性色素沉着症、Resse’s癌前期。本文报告1例广泛性地图状结膜癌前黑色素沉着症,並对黑色素瘤的起源、诊断、预后及处理加以讨论。病例报告石某,男,64岁。发现左眼上睑结膜及半月皱襞上黑斑6个月。于1980年10月份无意中发现左眼内侧白睛上黑点;上 Conjunctival melanoma is rare, about 1/40 of choroidal melanoma. Mainly divided into local nodular melanoma and diffuse or disseminated melanoma, which is also known as acquired or precancerous melanosis, precancerous melanosis (connective nevus), cancerous melanoma, sowing Dyslexia, Resse’s precancerous. This article reports a case of extensive conjunctival precancerous melanosis and discusses the origin, diagnosis, prognosis and management of melanoma. Case report Shi Mou, male, 64 years old. The left eye conjunctiva and half wrinkle on the black spot was found for 6 months. In October 1980, inadvertently found on the inside of the left eye white spots on the black;