Hair Flashcards

1
Q

difference between telogen and anagen hairs

A

anagen are embedded deeper and do not come out very easily, 90% of total hair

telogen hairs are less anchored and come out easily

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2
Q

term for common baldness

A

androgentic alopecia

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3
Q

What causes adrogentic alopecia

A

large terminal follicles transform into small vellus follicles (visible hair to invisible hair)
due to action of Dihydrotestosterone

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4
Q

Describe the male pattern of baldness

A

frontotemporal and vertex thinning

–> loss of all hair except occipical fringe

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5
Q

Describe the female pattern of baldness

A

retain frontal hairlines but have decreased density on crown

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6
Q

difference in timing of male and female balding

A

males much earlier (10 years)

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7
Q

What should you do if you see male pattern baldness in a female?

A

check DHEAS and testosterone
**checking to see if she has androgens which would be driving the pattern of baldness
DHEAS = Dehydroepiandrosterone

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8
Q

Genetics of androgeni alopecia

A

autosomal dominant or multifactorial

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9
Q

drug that induces anagen or increases anagen duration to increase the hair density

A

Minoxidill (Rogaine)

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10
Q

in men, causes reversal of the minituration process and/or slows the progression of hair loss in androgenic alopecia

A

Minoxidil (Rogaine)

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11
Q

Who benefits most from the use of minoxidil (rogaine)

A

young men to stop progression of hair loss

and women with androgenic alopecia

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12
Q

inhibits type II 5 alpha reductase

A

propecia (finasteride)

**inhibits the conversion of androgen testosterone into dihydrotestosterone

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13
Q

Does propecia (finasteride work?

A

yes pretty well, but it causes sexual dysfunction that may NOT be reversible

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14
Q

How many hairs do you shed daily

A

100 hars

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15
Q

What is telegen effluvium

A

excess shedding of hair due to pre-mature shunting of anagen to telogen phase
–> 20-35% of scalp hair lost

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16
Q

When does telogen effluvium occur?

A

6 weeks to 3 months after precipitating cause

17
Q

Does hair regrow after telogen effluvium?

A

yes, in 6 to 12 mos

*unless precipitating cause is not removed

18
Q

What is the most common cause of telogen effluvium?

A

childbirth

19
Q

What is the treatment for telogen effluvium?

A

reassurance–hair will grow back

can give 2% minoxidil solution

20
Q

term for acute loss of 80-90% of scalp hair due to an extreme alteration of growth in the majority of anagen hair

A

anagen effluvium

21
Q

What commonly causes anagen effluvium? When does it occur?

A

chemo drugs and anticoagulants –> occurs 1-2 weeks after cause

22
Q

What is drug alopecia and how is it different than anagen effluvium due to chemo drugs?

A

drug alopecia presents as telogen effluvium or can be slow loss or thinning over years
-due to drugs that affect hair production
?? im not entirely sure what the distinction is other than time course and amount lost??

23
Q

immunologically mediated hair loss + nail pitting

A

alopecia areata

24
Q

describe the hair loss in alopecia areata

A

circular area of complete loss with a normal scalp

25
T or F: alopecia areata may progress to loss of all scalp hair but not loss of total body hair
F: it can progress to both
26
alopecia totalis vs alopecia universalis
``` totalis = loss of all scalp hair universialis = loss of all body hair ```
27
swarm of bees on biopsy | = lymphocytes around hair bulb
alopecia areata
28
only effects pigmented hair and not white hairs
alopecia areata
29
hair may grow back straight or curly
alopecia areata
30
Will hair come back in alopecia areata?
yes
31
peripheral fringe + broken hair + history if tight braids/weaves
traction alopecia
32
traction alopecia is reversible or permanent
reversible unless insult it continued --> can scar over and become permanent **also can get S aureus folliculitis or dermatophyte infection --> scar --> permanent hair loss
33
perifollicular pustule
primary lesion in folliculitis | **can cover a large area and be "dissecting folliculitis/cellulitis
34
moth eaten scalp hair
secondary syphillis | **Check RPR**
35
What ldo you check (labs, etc) when a person come into the office with hair loss that does not fit male or female pattern
1. scalp for scalp disease 2. CBC 3. Ferratin 4. TSH
36
a person come into the office with hair loss that does not fit male or female pattern and they have a normal CBC and low ferritin, what do you do
give iron and get re-growth of hair