Hair Flashcards
Cause?
Immunological - response to emotional/physical stress, crash diet, childbirth, etc
When would this show up? Resolve?
6 weeks - 3 months after precipitating event
6 months - 1 year after hair loss
What percent of hair is lost in this disease?
80-90%
(Anagen effluvium; 80-90% of hair is in anagen phase)
Pathogenesis?
Shunting of hair from anagen to telegen phase; results in 20-35% increase in hair shedding
(Note the temporal hair loss characteristic of telegen effluvium)
Tx?
2% rogaine, transplant
(Female pattern androgenic alopecia)
Dx?
Folliculitis
Dx?
Dissecting folliculitis/cellulitis
Tx?
2% or 5% Rogaine, finasteride, transplant
First step in management?
RPR
(Moth eaten hair = secondary syphilis = RPR+)
Potential long-term consequence of this condition?
Scarring and permanent hair loss
(Traction alopecia - note the peripheral fringe; likely due to tight ponytails)
Tx?
None - this is occipital hair loss in an infant due to molting; it will resolve on its own and is considered normal
Dx? Tx?
Telegen effluvium; reassure pt it will grow back/can give Rogaine
Most likely cause?
S. aureus
(Dissecting folliculitis)
Dx?
Traction alopecia
Prince William probably has low ____, causing ___ pattern of hair loss that likely began when he was:
DHT
Vertex thinning
Late in adolescence or early in adulthood
This guy presents to you complaining of hair loss made much less obvious by his frosted tips. What lab values do you want to check and why?
- CBC - look for anemia that could be causing iron deficiency-related hair loss
- Ferritin - could be low despite a normal iron on CBC, again causing iron deficiency-related hair loss
- TSH - hypo and hyperthyroidism could manifest as hair loss
- DHEAS/Testosterone - frontotemporal hair loss is characteristic of male pattern AGA (not sure if routinely done for something this obvs)
