NEVUS OTA AND NEVUS ITO IN AMERICAN NEGROES

[摘要] Three cases of nevus Ota in American Negro patients are presented. In one of them there was an associated nevus Ito while in another one a glaucoma on the side of pigmentation was discovered. Special reference is made to the changes of the mucous membranes and eye accompanying this entity. The following structures in our cases or in cases from the literature were shown to be pigmented conjunctiva, cornea, sclera, iris, uveal tract, retina; palate, pharynx, nasal mucosa, tympanum. The presence of nevus Ota cells in the pigmented part of mucous membranes was demonstrated. The differential diagnosis of conditions which may be confused with nevus Ota is discussed, and it was pointed out that nevus Ota, in our opinion, has to be separated from aberrant Mongolian spot. In connection with the histogenesis of nevus Ota, two cases of schwannoma associated with blue nevus are discussed. Treatment of nevus Ota with application of dry ice or sodium diethyldithiocarbamate ointment is mentioned.