Dermatology

Question 1

what is the alternative name for ‘athlete’s foot’?

Answer 1

tinea pedis

Question 2

what are the risk factors for Tinea Pedis?

Answer 2

• wearing shoes, getting warm and sweaty
• locker room floors
• repeated exposure

Question 3

what are the signs of tinea pedis?

Answer 3

interdigital (in the toe webs)/plantar, hyperkeratotic, erythematous lesions

can be either dry and scaly or wet and soggy

sometimes in ring worm pattern

may have onychomycosis

Question 4

how do you distinguish tinea pedia from eczema on the foot?

Answer 4

eczema is bilateral whereas tinea pedis is more often unilateral

Question 5

what is an “Id reaction”?

Answer 5

an allergic response to fungus, causing vesicles in the area or on arms, chest and sides of fingers

Question 6

how do you manage tinea pedis?

Answer 6

butinafine/terbinafine (antifungal)

sertaconazole/econazole (antifungal)

lotrisone (antifungal + cortisosteroid)

Question 7

What is this?

Answer 7

interdigital tinea pedis

Question 8

what is the mdeical tword for “senile warts”?

Answer 8

seborrhoeic keratosis

Question 9

what is this?

Answer 9

seborrhoeic keratosis

Question 10

describe the typical appearance of a seborrhoeic keratosis.

Answer 10

“stuck on”, waxy, verrucous, velvety papules and plaques with a variety of colours

Question 11

What is this?

Answer 11

syringoma

Question 12

where are the two most common areas for syringomas?

Answer 12

1. inferior eye lid
2. vulva

Question 13

What is this?

Answer 13

syringoma

Question 14

what is the most common skin cancer?

Answer 14

Basal cell carcinoma (BCC)

Question 15

define BCC.

Answer 15

cancer of non-keratinizing cells in the basal layer of the epidermis

Question 16

describe the pcommonest presentation of a BCC

Answer 16

translucent papule/nodule with telangectiasias, rolled borders, may have ulceration.

Question 17

what is this?

Answer 17

BCC

Question 18

what is this?

Answer 18

nodular BCC

Question 19

what are the classifications of a BCC?

Answer 19

1. nodular BCC
2. pigmented BCC- ddx = nodular melanoma
3. superficial BCC: isolated patch of ezcema which does not respond to treatment

Question 20

What is the diagnosis?

Answer 20

roseola infantum

Question 21

what is exanthem subitum?

Answer 21

roseola infantum

Question 22

what is the presentation of roseola infantum?

Answer 22

high fever in 6-36 months old child, when the fever subsides a rose-pink maculopapular rash appears on the face, trunk, neck and extremities

Question 23

what causes roseola infantum?

Answer 23

HHV7/6

Question 24

what is the most important differential diagnosis for fever and rash in a child?

Answer 24

bacterial meningitis

Question 25

how do you manage roseola infantum?

Answer 25

manage the fever with cool sponge baths and/or acetaminophen

Question 26

what is atopic dermatitis?

Answer 26

eczema

Question 27

what is the most common type of psoriasis?

Answer 27

plaque psoriasis

Question 28

what is the Koebner phenomenon?

Answer 28

when injury/irritation induces psoriasis at the site.

Question 29

what is the diagnosis?

Answer 29

plaque psoriasis

Question 30

what is the diagnosis?

Answer 30

eruptive psoriasis

Question 31

what is the commonest presentation of plaque psoriasis?

Answer 31

red , sharply defined plaques with a silvery scale on the scalp, elbows, knees, plams, glans, penis, vulva, intergluteal fold and other flexures. Antoher sign is nail pitting.

Question 32

what is the diagnosis?

Answer 32

eczema (atopic dermatitis)

Question 33

what is the diagnosis?

Answer 33

eczema (atopic dermatitis)

Question 34

what is the diagnosis?

Answer 34

molluscum contagiosum

Question 35

what are the features of molloscum contagiosum?

Answer 35

red pustules, looks like little snails with central umbilication lesion moves slowly as a result of self-innoculation can be sexually transmitted

Question 36

how do you manage molloscum contagiosum?

Answer 36

self-resolving

Question 37

what causes molloscum contagiosum?

Answer 37

pox-virus

Question 38

what does herpes simplex virus cause?

Answer 38

cold sores

Question 39

what does herpes zoster cause?

Answer 39

shingles and chicken pox

Question 40

what are the features of herpes zoster (shingles)?

Answer 40

pain in dermatomal region, then a red, painless, vesicular rash in dermatomal region

Question 41

what is the diagnosis?

Answer 41

pityriasis rosea

Question 42

what are the features of pityriasis rosea?

Answer 42

"christmass tree" distribution, of a red, fine bran-like surface/fine scale

Question 43

how do you manage pityriasis rosea?

Answer 43

self-resolving

Question 44

what is the diagnosis?

Answer 44

scabies

Question 45

what are the features of scabies?

Answer 45

burrows in skin, with allergic reaction to eggs