title: Follicular occlusion triad in a follicular blocking disease (pityriasis rubra pilaris).
mesh_terms: D000152:Acne Vulgaris / Q000209:etiology*; D000328:Adult; D002481:Cellulitis / Q000209:etiology*; D006801:Humans; D008297:Male; D010916:Pityriasis Rubra Pilaris / Q000150:complications* / Q000473:pathology; D012536:Scalp Dermatoses / Q000209:etiology*; D012867:Skin / Q000473:pathology; D013546:Sweating