Focal / Localized Hair Loss (Alopecia) - Differential Diagnosis Algorithm
Scarring - Irreversible-biopsy required
- Infectious
• Tinea capitis with kerion
• Folliculitis decalvans
- Secondary to Skin Disease
• Discoid lupus erythematosus
• Lichen planopilaris
• Pseudopelade of Brocq
• Alopecia Mucinosa
• Keratosis Follicularis
• Aplasia cutis
Non-Scarring - Reversible
- Broken Hair Shafts
• Tinea capitis
• Trichotillomania
• Traction alopecia
• Congenital hair shaft abnormalities
- Hair Shafts Intact or Absent
• Alopecia areata
• Secondary syphilis
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