Hair

Question 1

In utero, babies molt body and scalp hair when?

Answer 1

22 and 28 weeks

Question 2

Hair in the Anagen phase does not come out, it is rooted very deeply. How long does this growth phase last?

Answer 2

1-5 years

Question 3

Hair in the Telogen phase does come out, its root is closer to the surface. This phase lasts

Answer 3

3 months

Question 4

What is androgentic alopecia

Answer 4

Common ass baldness

Question 5

What is the mechanism of androgentic alopecia

Answer 5

Gradual minituriazation of the hair. Transformation of large terminal follicles to small vellus follicles. The hair becomes basically invisible. SO with common baldness, you’re not actually losing hair as much as the follicles and hair are just becoming tiny.

Question 6

Male pattern androgentic allopecia

Answer 6

frontotemporal recession and vertex thinning, loss of all scalp hair exceptociptial fringe

Question 7

Femal pattern baldness

Answer 7

women tend to just lose the hair from their crowns

Question 8

female pattern baldness usually starts when?

Answer 8

25-35

Question 9

Lab tests for male pattern androgentic allopecia appearing in women

Answer 9

DHEAS and testosterone levels

Question 10

The inheritance pattern for androgentic allopecia is…

Answer 10

autosomal dominant or multifactorial. can come from anywhere.

Question 11

What is the moa of minoxidil?

Answer 11

Increases hair density either by induction of anagen stage or decrease in anagen stage duration. hair diameter is increased.

No one is completely sure how it works

Doctor in miami,,,,bedside observation that led to treatment

Question 12

2% minoxidil for

Answer 12

women

Question 13

5% for

Answer 13

men

Question 14

WHAT HORMONE CAUSES MALE PATTERN LOSS IN GENETICALLY SUSCEPTOBLE INDIVIDUALS

Answer 14

5 ALPHA DIHYDROTESTOSTERONE….KNOW THIS

Question 15

HOW DOES FINESTERIDE WORK?

Answer 15

IT INHIBITS 5 ALPHA REDUCTASE WHICH MAKES 5 ALPHA DIHYDROTESTOSTERONE

Question 16

The sexual side effects of finesteride can last how long

Answer 16

forever, according to a 2012 FDA study

Question 17

TELEGEN EFFLUVIUM

Answer 17

PREMATURE SHUNTING OF ANAGEN TO TELOGEN. RESULTS IN MASS LOSS OF 20-35% OF TOTAL HAIR AT ONCE.

Question 18

When is Telogen effluvium seen?

Answer 18

Usually 6 weeks to 3 mths after the precipitating cause. Precipitating causes can be:
childbirth is a big one
surgery
certain drugs

• the prototype is about 3mths after pregnancy some woman starts losing all of her hair

It usually regrows in 6-12 mths unless the precipitating cause is repeated.

Question 19

Treatment of telogen effluvium

Answer 19

reassurance and rogaine

Question 20

What is anagen efflucvium

Answer 20

alteration in the growth of anagen hair….90% hair loss about 3 weeks after teh cause

Question 21

What is the precipitating cause of anagen effluvium?

Answer 21

Usually chemotherapy

Question 22

ALOPECIA AREATA

Answer 22

CIRCULAR AREAS OF COMPLETE LOSS WITH NORMAL SCALP

• THIS IS IMMUNOLOGICALY MEDIATED
• IMPORTANT!! biopsy shows swarm of bees, lymphocytes around hair bulb
• hair usually regrows, also usually accompanied by pitting

Question 23

The main concern with traction allopecia is…

Answer 23

it can result in staph aureus folliculitis

Question 24

Folliculitis is almost always caused by

Answer 24

staph

Question 25

Moth eaten appearance

Answer 25

secondary syphillis

Question 26

RPR positive

Answer 26

syphillis

Question 27

Does hair regrow when you treat someone with syphillis

Answer 27

yeah, usually

Question 28

IF A PT COMPLAINS OF HAIR LOSS, YOU SHOULD:

Answer 28

CHECK THE SCALP FOR DISEASE
ORDER A: CBC TO CEHCK FOR ANEMIA
ORDER FERRITIN TESTS TO CHECK FOR LOW FERRITIN (IF THE CBC IS NORMAL AND FERRITIN IS LOW THEN GIVE IRON), TSH (HYPO AND HYPER-THYROIDISM