Nonscarring Alopecias: Clinical features of the most ...

Nonscarring Alopecias: Clinical features of the most common types
Patterned hair loss:
 - Age: puberty or older
 - Onset: gradual
 - Possible FHx
 - Hair thinning with or without bare patches
 - Distribution: men- the crown, receding hairline; women- wider midline part of the crown
Telogen effluvium: 
 - Age: mostly adults
 - Onset: abrupt
 - May be triggered by iron deficiency, thyroid imbalance, general anesthesia, postpartum, and drugs
 - Hair thinning, No bare patches
 - Distribution: generalized
Alopecia areata:
 - Age: mostly before 20 years of age
 - Onset: abrupt
 - May have or FHx of autoimmune disease
 - Mostly bare patches; rarely diffuse hair thinning
 - Distribution: patchy or multifocal
 - Total alopecia in 5% of cases
Tinea capitis
 - Age: mostly children
 - Onset: gradual or abrupt 
 - Contact with animals (eg pets)
 - Bare patches
 - Distribution: any area of scalp; focal or multifocal with or without inflammation; scales
 - Age: mostly children and adolescents
 - Onset: gradual or abrupt
 - Feeling a tension that is relieved by pulling the hair
 - Can be associated with other psychiatric disorders
 - Hair thinning, Rarely bare patches, Bizarre shaped patches with irregular borders
 - Distribution: frontotemporal/frontoparietal scalps

#Alopecia #types #differential #diagnosis
Contributed by

Dr. Gerald Diaz
Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief πŸ‡΅πŸ‡­ πŸ‡ΊπŸ‡Έ - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: | Twitter:
Medical jobs
view all


Related content