Pediatric Exanthems

Question 1

a patient presents with an unroofed blister that looks like a “honeycomb” on their finger. Dx?

Answer 1

herpetic whitlow

Question 2

a patient presents with a rash that looks like a “dew drop on a rose”. Dx?

Answer 2

chickenpox

Question 3

patient presents with koplik spots that are white/grey and elevated lesions on an erythematous base. Dx?

Answer 3

rubeola (measles)

Question 4

patient presents with a pinpoint petechiae rash that first appeared on face that spread to the rest of the body

Answer 4

rubella (german measles)

Question 5

patient presents with a rash on their face that looks like a “slapped cheek”. Dx?

Answer 5

erythema infectiosum (5th disease)

Question 6

patient presents with a rash on their trunk/extremities that is a “lace like rash”. Dx?

Answer 6

erythema infectiosum

Question 7

a patient presents with a “rose pink” rash that blanches with pressure. Dx?

Answer 7

roseola infantum

Question 8

a patient presents with a firm, flesh colored, dome shaped rash with a central umbilication. Dx?

Answer 8

molluscum contagiosum

Question 9

a patient presents with firm papules that are rough and thick, and have pinpoint-sized thrombosed capillaries (black dots). Dx?

Answer 9

verruca vulgaris

Question 10

a patient presents with round erythematous papules that become target lesions

Answer 10

erythema multiforme

Question 11

patient presents with diffuse erythematous eruptions that feel like sandpaper and oral exam shows strawberry tongue. Dx?

Answer 11

scarlet fever

Question 12

a patient presents with a multiple vesicular lesions with a thick “golden brown” crust. Dx?

Answer 12

impetigo

Question 13

a patient presents with rash that begins on the wrists and ankles, and later appears on the palms and soles of feet. Dx?

Answer 13

rocky mountain spotted fever

Question 14

patient presents with a large red macule with a central clearing; looks like a bull’s eyes. Dx?

Answer 14

lyme disease

Question 15

patient presents with a fluctuant, erythematous rash with a central punctum. Dx?

Answer 15

abscess

Question 16

a patient presents with erythematous rash that is indurated and has local edema. Dx?

Answer 16

cellulitis

Question 17

patient presents with circular/oval rash that has scaly patches/plaques with central clearing and a raised border. Dx?

Answer 17

tinea corporis

Question 18

patient presents with maculopapular rash with thin plaques that are hypo/hyperpigmented. Dx?

Answer 18

tinea versicolor

Question 19

patient presents with “white plaques” on buccal mucosa, palate, and tongue. Dx?

Answer 19

oral thrush

Question 20

patient presents with “beefy” red plaques with superficial pustules, involving the skin folds on their bottom. Dx?

Answer 20

diaper candidiasis

Question 21

patient presents with herald patch that is salmon colored on the chest, neck, and back. It is scaly and looks like a Christmas tree. Dx?

Answer 21

pityriasis rosea

Question 22

patient presents with pruritic eruption that look like burrows with “secondary excoriations”. Dx?

Answer 22

scabies

Question 23

patient presents with ill-defined, coalescing, erythematous macules with purpuric centers that are tender to touch. Dx?

Answer 23

stevens-johnson syndrome / toxic epidermal necrolysis

Question 24

patient presents patches and plaques, scales and crusts on their face. Dx?

Answer 24

atopic dermatitis

Question 25

patient presents with symmetrical eruption of vesicles on palms, soles; are deep-seated lesions that may turn into large bullae. Dx?

Answer 25

dyshidrotic eczema

Question 26

patient presents with multiple inflammatory nodules that are tender, has fibrotic scars, and found in the axilla, inguinal and inner thighs. Dx?

Answer 26

hidradenitis suppurativa