Hair and Nail Diseases

Question 1

hair loss

Answer 1

alopecia

Question 2

non-scarring

Answer 2

non-cicatricial

Question 3

scarring

Answer 3

cicatricial

Question 4

produced by matrix, composed of keratins

Answer 4

hair shaft

Question 5

color of hair depends on __

Answer 5

melanosomes

Question 6

greying of hair is due to ___

Answer 6

decreased melanocytes

Question 7

active growth phase of hair cycle

Answer 7

anagen

Question 8

transition phase of hair cycle

Answer 8

catagen

Question 9

resting phase of hair cycle

Answer 9

telogen

Question 10

how long is hair in anagen phase??

Answer 10

2-6 years

Question 11

how long is hair in catagen phase?

Answer 11

1-2 weeks

Question 12

how long is hair in telogen phase??

Answer 12

2-4 months

Question 13

excessive shedding of normal telogen club hairs

Answer 13

telogen effluvium

Question 14

synchronous premature conversaion of anagen hairs to telogen hairs, appears approximately 2-4 months after the inciting event and self resolving

Answer 14

telogen effluvium

Question 15

possible causes of telogen effluvium

Answer 15

postpartum
thyroid disease
deficiencies in iron, folate, b12
medications
weight loss or unusual diet
systemic illness
post surgical or post accident 
psychological stres

Question 16

decreased mitotic activity of hair matrix, thin shaft breaks

Answer 16

anagen effluvium

Question 17

causes of anagen effluvium

Answer 17

chemotherapy
mercury
boric acid
protein malnutrition

Question 18

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

Answer 18

alopecia areata

Question 19

hair will regrow back grey, blonde or white and texture will be like baby fine hair

Answer 19

alopecia areata

Question 20

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

Answer 20

alopecia areata

Question 21

all scalp hair is lost

Answer 21

alopecia totalis

Question 22

all hair on entire body is lost

Answer 22

alopecia universalis

Question 23

treatment for alopecia areata
-
-
-
-

Answer 23

spontaneous remission is common
intralesional corticosteriods
topical steriods
immunotherapy (diphencyprone)

Question 24

male pattern hair loss is called

Answer 24

androgenetic alopecia

Question 25

locations of the head androgenetic alopecia effects

Answer 25

vertex and frontotemporal

Question 26

onsets teens to 30s, inherited and polygenic, androgens

Answer 26

androgenetic alopecia

Question 27

shortens anagen leanding to miniaturization of hair follicles

Answer 27

DHT

Question 28

regulated by 5 alpha reductase type 2

Answer 28

DHT

Question 29

men with ___ deficieny do not bald

Answer 29

5 alpha reductase type 2