Mamitaro Ohtsuki

Case of Malignant melanoma discontinuously formed in left lower eyelid division and bulbar conjunctiva.

Spontaneous regression of lentigo maligna melanoma (LMM) is well known to occur occasionally. We experienced a possible cass of LMM located from internal canthus to lower eyelid and a red-bean sized black-brown nodule at adjacent bulbar conjunctiva was also present. The apparent continuity was not found between two lesions. In addition, histological findings suggestive of spontaneous regression were not recognized. This discontinuity of two lesions is most possibly explained by spontaneous regression of LMM, although we did not prove clinical and histological continuity. The other possible explanations are that two lesions occurred separately, or that malignant melanoma of bulbar conjunctiva was due to intransit metastasis.