Rashes

Question 1

erythematous serpiginous macular lesions w/ pale centers on trunk/extremities

Answer 1

erythema multiforme

think rheumatic fever

Question 2

atrophic and translucent acral integument

Answer 2

acrodermatitis chronica atrophicans (late comp of Borrelia afzelii, mostly in Europe)

Question 3

reticulated brown network on skin chronically exposed to high temps

Answer 3

erythema ab igne

• permanent
• may undergo malig. xform to squamous cell carc

Question 4

inflamm skin dz, usually in adults: erythematous plaques w/ central clearing and peripheral “trailing” scale

Answer 4

erythema annulare centrifugum

Question 5

erythematous malar rash -> erythematous maculopap eruption on extensor extremities

Answer 5

erythema infectiousum

- as it fades -> central clearing causes reticulated lacy patterned rash, waxes/wanes for 9-11 days

Question 6

agents used to tx pediculus humanus capitis (head louse)?

Answer 6

• lindane
• pyrethrins combined w/ piperonyl butoxide
• malathion
• permethrin

Question 7

macule or papule w/ central hem. punctum on shoulder, trunk or buttocks

Answer 7

pediulus humanus corporis

Question 8

intense pruritus of finger webs, wrists, and aerolae of nipples/glans in men

Answer 8

scabies

Question 9

lichenification and posterior LAD cause?

Answer 9

scratching secondary to head lice

Question 10

severe erythema multiforme, on at least 2 mucosal surfaces, <10% BSA

Answer 10

SJS

Question 11

> 30% BSA?

Answer 11

TENS

Question 12

widespread pustular dz with fever in response to a med

Answer 12

acute generalized exanthematous pustulosis

Question 13

tense non flaccid non inflamm bullae on palms and soles

Answer 13

epidermolysis bullosa acquisita (autoabs against type VII collagen)

Question 14

fever, diffuse erythematous rash, exfoliation, Nikolsky sign, sparing of mucosa

Answer 14

staphylococcal scalded skin syndrome

Question 15

rose-pink macular rash on trunk-> arms and face kid 7-13 months after fever

Answer 15

roseola infantum aka exanthema subitum

Question 16

1-3 cm pink macules and papules and annular plaques that wax and wane w/in hours and are greatly accentuated by heat

Answer 16

erythema marginatum of RF

Question 17

disseminated hyperpigmented oval shaped macules that urticate when rubbed. persist for months or years then resolve spontaneously

Answer 17

urticaria pigmentosa

Question 18

persistent urticarial plaques +/- fever, elevated ESR

Answer 18

urticarial vasculitis

Question 19

well demarcated erythematous raised skin lesions w/ central clearing of various sizes that coalesce to form geographic plaques

Answer 19

urticaria

cause: IgE hypersensitivity, often affects lips and upper resp/GI tracts

Question 20

rose-colored, blanching, maculopapular rash that begins on extremities and spreads centripetally to the entire body; erythematous macules can change to petechiae

Answer 20

Rocky Mtn Spotted Fever

Question 21

small, well demarcated oval plaque yellow-orange, slightly raised on infant head or neck, surrounded by area of alopecia; becomes wartlike by adolescence

Answer 21

nevus sebaceous

- often comp by secondary malignancy in adulthood (BCC), so bx done

Question 22

nevus on back; center disappears over months, leaving hypopigmented area around it

Answer 22

halo nevus

- kids with vitelligo are predisposed

Question 23

permanent patch of blue, black, and brown macules that may enlarge/darken over time; MC on supraclaviuclar, scapular, and deltoid regions; speckled appearance

Answer 23

nevus of Ota

• MC in females, Asians, and blacks
• malig degen rare