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Allopecia - Differential Diagnosis Framework for Hair Loss

Localized / Focal Hair Loss Pattern:
 • Scarring Alopecia:
Localized / Focal ... Capitis - Skin ... Traction alopecia Diffuse ... , erosions, or erythema ... Examine the entire skin
Primary Dermatological Lesions
Primary lesions are physical changes in the skin considered to be caused directly by
considered to be caused ... a generalized disorder ... to masking of local ... Nomenclature #Atlas #Key ... #Basics
PALM RASHES 
Common features and patterns:
1.	Color:
o	Red or erythematous: Common in inflammatory or allergic reactions.
o	Purple or purpuric:
suggest vascular or hematologic ... depigmentation disorders ... and Key Features ... Drug Reactions: Diffuse ... palm #dermatitis #erythema