Cornoid lamellae associated with hair follicle in porokeratosis: Two cases reports

Case 1: A 35-year-old female patient noted an annular hyperkeratotic plaque on her left cheek approximately 15 years prior to her visit There was a parakeratotic column associated with a hair follicle in the plaque. Case 2 : A 69-year-old male patient noted brownish hyperkeratotic plaques on the four extremities approximately 19 years prior to his visit. The number of plaques increased, and they appeared also on the abdomen. There was a parakeratotic column associated with a hair follicle in the plaque. We diagnosed these cases as porokeratosis with cornoid lamellae associated with hair follicles. Cornoid lamellation has rarely been reported to occur in infundibula or in acrosyringia, but in the two patients reported here, cornoid lamellae was clearly seen at hair follicles.