The term "divided nevus" or in German "geteilte Naevus" was proposed by A. Fuchs in 1919 to designate the simultaneous occurrence of nevi on opposing parts of the upper and the lower lid. The two nevi form a unit when the lids are closed and are divided when the eye is opened. Fuchs (1919) reported six cases of this rare and peculiar disease. Previously von Michel (1908) had described two similar cases and later Bachstez (1923) and Bardelli (1935) each reported a case. Surgical treatment of divided nevi was reported in two cases by Collenza (1937) and in one case by Callahan (1946). In 1950 Fuchs reviewed the problem and reported three more cases, all of whom were Chinese. The following year Lo (1951) reported three cases among Chinese.
Clinically the tumors are of varying size and of varying localization on the lids. The tumors on both lids behave as
EHLERS N. A Case of Divided Nevus. Arch Ophthalmol. 1965;73(5):664–666. doi:10.1001/archopht.1965.00970030666013
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