Hair and Nail Diseases Flashcards
(29 cards)
hair loss
alopecia
non-scarring
non-cicatricial
scarring
cicatricial
produced by matrix, composed of keratins
hair shaft
color of hair depends on __
melanosomes
greying of hair is due to ___
decreased melanocytes
active growth phase of hair cycle
anagen
transition phase of hair cycle
catagen
resting phase of hair cycle
telogen
how long is hair in anagen phase??
2-6 years
how long is hair in catagen phase?
1-2 weeks
how long is hair in telogen phase??
2-4 months
excessive shedding of normal telogen club hairs
telogen effluvium
synchronous premature conversaion of anagen hairs to telogen hairs, appears approximately 2-4 months after the inciting event and self resolving
telogen effluvium
possible causes of telogen effluvium
postpartum thyroid disease deficiencies in iron, folate, b12 medications weight loss or unusual diet systemic illness post surgical or post accident psychological stres
decreased mitotic activity of hair matrix, thin shaft breaks
anagen effluvium
causes of anagen effluvium
chemotherapy
mercury
boric acid
protein malnutrition
rapid loss of hair in round patches 1-5 cm, 1.7% lifetime risk, anagen abruptly terminated in affected area, autoimmune, may be precipitated by stress, increased incidence of other autoimmune diseases
alopecia areata
hair will regrow back grey, blonde or white and texture will be like baby fine hair
alopecia areata
can affect the scalp, beard, eyebrows and eyelashes but the primary area is scalp, may see “exclamation point hairs” at periphery, nails: pitting, trachyonychia and spotted lunulae
alopecia areata
all scalp hair is lost
alopecia totalis
all hair on entire body is lost
alopecia universalis
treatment for alopecia areata - - - -
spontaneous remission is common
intralesional corticosteriods
topical steriods
immunotherapy (diphencyprone)
male pattern hair loss is called
androgenetic alopecia
