Since alopecia has many different causes, the pathophysiologic mechanism for its development varies widely according to the cause. Alopecia areata, for example, is related with CD8+ T-cell autoimmunity, while androgenetic alopecia is related with androgen hormones effects' on the hair follicle which leads to its miniaturization and hair loss. Tinea capitis on the other hand is an infectious disease that can damage the hair follicle and lead to definitive hair loss.
Alopecia pathophysiology
Alopecia risk factors
Skin cancer pathophysiology
Psoriasis risk factors
Alopecia differential diagnosis
Squamous cell carcinoma of the skin pathophysiology
Conjunctivitis pathophysiology
Dermatophytosis pathophysiology