Alopecia
Differential Diagnosis
Diffuse Hair Loss (Alopecia)
Scarring (Irreversible-biopsy required)
Lupus erythematosus
Lichen planopilaris
Non-scarring (reversible)
Pattern : Androgenetic alopecia
Anagen Effluvium : Chemotherapy , Loose anagen syndrome
Discrete Patches :
Alopecia totalis (all scalp and facial hair)
Alopecia universalis (all body hair)
Telogen Effluvium
Endocrine : Hyper - Hypothyroidism, Hypopituitarism, Post-partum
Dietary : Iron , Zinc, Copper deficiency, Vitamin A Excess
Drugs :
discontinuation Oral contraceptives
retinoids (acitretin, isotretinoin)
Hyperthyroid drugs : PTU MMI
Anticoagulants : heparin
Anticonvulsants : phenytoin, valproic acid, carbamazepine
Lithium
Stress Related : Post-infectious, Post-operative, Psychological stress
Ref .https://plasticsurgerykey.com/alopecias-3/
https://www.belgraviacentre.com/blog/stress-and-hair-loss-are-they-related
Alopecia areata
Dermoscope : Positive Black dot
10%TA intralesional 1:1 + dilute , ถ้ามากเกินจะเกิด fat necrosis แล้วหัวมันจะยุบ , F/U 2 wk