AbstractA case of a 70‐year‐old man with several dome‐shaped tumors with acantholysis was reported. The histopathological findings of these black‐brownish colored tumors on the back were compatible with seborrheic keratosis, consisting of basaloid and squamoid cells.Although three cases reported by Tagami et al. (1978) and Uchiyama et al. (1986) showed intraepidermal epithelioma‐like tumor nests in the acanthotic lesions, our case was thought to correspond to another variant of seborrheic keratosis with aca
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