Nail disease

Question 1

DDx onychomycosis?

Answer 1

BacterialinfectionespeciallyPseudomonas aeruginosa, which turns the nail black or green.
Psoriasis.
Eczemaordermatitis.
Lichen planus.
Viralwarts.
Onycholysis
Onychogryphosis(nail thickening andscalingunder the nail), common in the elderly

(dermnetnz)

Question 2

DDx onycholosis (lifting the nail)

Answer 2

V 
I – Dermatophyte infection, yeast bacteria (pseudomonas), viral (herpes) 
Neoplasm – multiple myeloma, 
Drugs – ocp, tetrcycylines, 
I
Congenital – congenital oncyholysis, 
A – Psoriasis, Reiters syndrome, sarcoidosis, scleroderma 
T
E- hyper/hypothyroidism, diabetes 
S

Question 3

Most common cause of Onychomycosis?

Answer 3

Trichophyton Rubrum (Ref: how to treat quiz)

Question 4

Paronychia: Recurrence, possible cause?

Answer 4

Infection with herpes simplex virus (Ref: how to treat quiz)

Question 5

What % of nail changes occur in patients with skin changes of psoriasis?

Answer 5

50% can have nail changes ((Ref: how to treat quiz)

Question 6

Onychogryphosis

Answer 6

ram’s horn toe nail = benign

Question 7

Oncyhocryptosis

Answer 7

Ingrown toe nail

Question 8

Koilonychia

Answer 8

Spoon shaped nails –> chronic fe deficiency

Question 9

Causes of nail pitting

Answer 9

Psorisais
Alopecia Areata
(ref:dermnetnz)