Mixed nevi are not uncommon. Perhaps the most frequent types are vascular, such as the hemolymphangioma. Sebaceous nevi in which apocrine glands occurred have been reported by Robinson1 and Koch,2 and Koch2 stated that eccrine glands have also been noted in these nevi. It should be emphasized, however, that the apocrine and eccrine elements, when they have occurred, have seemed to be normal and entirely independent of the nevus. Sachs and Lewis3 reported a case which showed a mixed tumor containing cartilage and bone, in the deep part of which a nevus syringoadenomatosus papilliferus was present.
To find a nevus consisting of two entirely distinct congenital malformations, each of them rare in its own right, is most unusual. For this reason we report a mixed nevus of a type not heretofore described in the literature, one consisting of a sebaceous nevus and a nevus syringoadenomatosus papilliferus.
MARCUS MD, WOOLDRIDGE WE. SEBACEOUS NEVUS AND NEVUS SYRINGOADENOMATOSUS PAPILLIFERUS OCCURRING AS A MIXED FORM. Arch Derm Syphilol. 1950;61(1):105–108. doi:10.1001/archderm.1950.01530080111011
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