Aiims may 2017: solved paper with explanation-Dermatology

Q-1. A child presented with scaly plaques on head with itching, mild discharge and hair loss. What investigation should be done next?
a) KOH Mount
b) Tzanck Smear
c) Gram Stain
d) Slit Skin Preparation

Answer: KOH Mount
Explanation:

Q-2. A young female presented with vaginal itching and green frothy genital discharge. Strawberry vagina is seen on examination. What will be the drug of choice?
a) Doxycycline
b) Metronidazole
c) Oral fluconazole
d) Amoxicillin

Answer: Metronidazole
Explanation:

Q-3. A 12-year-male leper came with 4 hypo-pigmented lesions on the back and 4 on the left arm with loss of sensation. What will be the treatment of choice?
a) Rifampicin 450 mg + Dapsone 50 mg + Clofazimine 150 mg monthly and 50 mg daily
b) Rifampicin 600 mg + Dapsone 150 mg only
c) Rifampicin 450 mg + Dapsone 50 mg + Clofazimine 150 mg monthly and 50 mg on alternate days
d) Rifampicin 600 mg + Dapsone 150 mg + Clofazimine 300 mg monthly and 50 mg daily

Answer: Rifampicin 450 mg + Dapsone 50 mg + Clofazimine 150 mg monthly and 50 mg on alternate days
Explanation:

Q-4. A histopathological image of the skin biopsy of a patient given below is suggestive of

image
a) Leprosy
b) Lichen planus
c) Psoriasis
d) Pemphigus vulgaris

Answer: Pemphigus vulgaris
Explanation:

Q-5. Identify the following congenital lesion on face:
image
b) Malignant Melanoma
c) Congenital Melanocytic Nevus
d) Epidermal Verrucous nevi

Answer: Congenital Melanocytic Nevus
Explanation:

Q-6. A 11-year-child presented with itchy and hyper-pigmented plaques in cubital and popliteal fossa as shown below: What is the most likely diagnosis?
a) Atopic dermatitis
b) Psoriasis
c) Pemphigus vulgaris
d) Solar Keratosis

Answer: Atopic dermatitis
Explanation:

Q-7. A young girl presented to the OPD with patchy hair loss for 2 weeks as shown below. There was no scarring or erythema. What is the likely cause?
image
a) Trichotillomania
b) Alopecia areata
c) Telogen effluvium
d) Tinea capitis

Answer: Trichotillomania
Explanation:

Q-8. A middle aged lady presented to OPD with painful blisters on the skin and oral mucosa. Direct immuno-fluorescence was done as shown below. All of the following are true about the disease pathogenesis except
image
a) Due to IgG against hemi-desmosomes
b) Due to IgG against Desmoglein 1
c) Due to IgG against Desmoglein 3
d) Intercellular deposits of IgG and C3

Answer: Due to IgG against hemi-desmosomes
Explanation: