FOLLICULITIS AND PERIFOLLICULITIS
FOLLICULITIS - SUPPURATIVE - SUPERFICIAL
| Sign of infectious cause identifiable | Hematoxylin and eosin | Bacteria | Staphylococcal folliculitis Psudomonas folliculitis |
| Fungal | Dermatophytosis | ||
| Yeast | Candidiasis | ||
| Viral | Herpesvirus infection | ||
| Silver | Spirochetal | Syphilis, secondary | |
| No sign of infectious cause | Neutorophils | Comedones | Acne vulgaris |
| No comedones | Folliculitis of renal dialysis Systemic medications, e.g., corticosteroids, hydantoin halogens Exogenous agents, e.g., cutting oils, petrolatum, adhesives |
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| No comedones, perifollicular infiltrate of lymphyocytes and histiocytes | Rosacea/ Perioral dermatitis/ Periocular dermatitis |
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| No comedones, altered elastic fibers in intraepidermal channels | Elastosis perforans serpiginosa | ||
| Eosinophils | Collections of eosinophils in epidermis | Toxic erythema of the newborn | |
| Collections of eosinophils in infundibular | Eosinophilic pustular folliculitis |