Psoriasis‐like dermoscopic pattern of clear cell acanthoma

BACKGROUND: Dermoscopy provides additional criteria for the diagnosis of skin lesions. OBJECTIVE: To investigate the dermoscopic aspect of clear cell acanthoma (CCA). METHODS: Six consecutive cases of CCAs were observed under conventional dermoscopy (Case 1-4) or videodermoscopy (Case 5-6). RESULTS: Common dermoscopic findings were: (i) squamous surface with translucid collarette; (ii) dilated capillary loops, mainly perpendicularly orientated to the skin surface, as dotted, pinpoint-like structures, regularly distributed in a reticular array over the surface. CONCLUSIONS: The vascular psoriasis-like dermoscopic findings seem to be a clue for CCA and provide evidence of an inflammatory process for CCA formation.