Papules, Warts, Or Nodules

Question 1

Verrucae sx And cause

Answer 1

Warts

Papilloma virus

Question 2

Condyloma acuminatum vs condyloma lata

Answer 2

A: genital and perianal warts caused by HPV. Soft, moist, pink or gray, cauliflower like, clusters
L: hypertrophic, smooth, white papules in genitals caused by treponema pallidum

Question 3

Oral hairy leukoplakia cause

Answer 3

EBV

Question 4

Kaposi sarcoma sx And cause

Answer 4

Reddish purple maculopapular nodules
ESP in sun exposed areas
HHV8

Question 5

Swimming pool granuloma sx and cause

Answer 5

Knees and elbows
Papules that ulcerate and become granulomatous
Mycobacterium marinum

Question 6

Erysipeloid sx and cause

Answer 6

Reddish purple modules on fingers and hands at site of trauma.
Arciform configuration
Butchers and vets (esp hogs)
Erysipelothrix rhusiopathiae

Question 7

Black widow spider bite

Answer 7

Painful, swollen, pruritic, abd pain with “board like” stiffness
May see two red puncta from bite
Latrodectus mactans

Question 8

Lupus vulgaris and primary tb of the skin sx and cause

Answer 8

Mycobacterium tuberculosis
Reddish brown, flat, soft plaques
head and neck and extremities (uncommon on trunk)
With primary tb you have a papule or nodule that may ulcerate at site of innoculation

Question 9

Leprosy aka Hansen’s disease

cause and sx

Answer 9

Mycobacterium leprae
Lepromatous: more severe, erythema nodosum, lots of plaques, poorly defined borders
Tuberculoid: mild, hypopigmented scaled macules with raised border, well defined margins, fewer in number

Question 10

Chagas’ disease cause and sx

Answer 10

Trypansoma cruzi
Vector: kissing bug/reduvid/Triatominae
Romañas sign: eye probs from feces
C. and S. America
Fever, malaise, hepatosplenomegaly, cardiomyopathy
Indurated erythematous lesion at bite site

Question 11

Cutaneous larva migrans aka creeping eruption cause and sx

Answer 11

Ancylostoma braziliensis or strongyloides from dog or cat feces
Pruritic, transient red papule, zig zag

Question 12

Hookworm Disease cause and sx

Answer 12

Necator americanus and Ancylostoma duodenale from soil/sand with human feces
Papules, vesicles, or bullae
Urticaria sometimes
Toes and feet

Question 13

Strongyloidiasis cause and sx

Answer 13

Strongyloides stercoralis from soil/sand with human feces
Blotchy red papules or urticaria
Also creeping eruption

Question 14

Swimmers itch cause and sx

Answer 14

Schistosoma sp.
vector: snails
pruritic transient pink macules or papules
Then they ulcerate

Question 15

Trichinosis cause and sx

Answer 15

Trichinella spiralis from undercooked meat 
Urticaria 
Maculopapules or petechiae 
Face esp eyelids and conjunctiva
Hands and feet

Question 16

Pediculosis cause and sx

Answer 16

Body lice (Pediculus humanus corporis)
Head lice (P. humanus capitis)

Pruritic red maculopapules

Question 17

Pubic pediculosis cause and sx

Answer 17

Aka crabs aka phthriasis
Phthirus pubis
Pruritic small red macules

Question 18

Scabies cause and sx

Answer 18

Sarcoptes scabiei
Threadlike burrows
Erythematous papules that become vesicles
Pruritic esp at night
Fingers, nipples, genitals, wrists, elbows

Question 19

Flea bites cause and sx

Answer 19

Pulex irritans
Pruritic papules and urticaria
Freq sterile central pustule

Question 20

Chigger bites cause and sx

Answer 20

Trombicula irritans

Pruritic papules

Question 21

Bedbug bite cause and sx

Answer 21

Cimex lectularius and hemipterus

Bites often 2 or 3 in a line