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Dermatology MCQ

By AdminPosted On 05-Oct-2016

1. Ring Scales : Dermatology MCQ

A woman presented with an itchy lesion below her right breast. On examination it was found to have well formed ring scales. The diagnosis is

a) Candida
b) Trichophyton rubrum
c) Lichen planus
d) Bacterial infection

Correct Answer: b) Dermatophytosis: Trichophyton rubrum. The clinical description matches Dermatophytosis. The term "ringworm", commonly used to refer to such infections, is a misnomer. Dermatophytes of the genera Trichophyton and Microsporum are the most common causative agents.

2. Treatment of pustular psoriasis is

a) Hydroxyurea
b) Retinoids
c) Thalidomide
d) Steroids

Correct Answer: a,b,d. There isn't one topical drug that is best for all people with psoriasis. Because each drug has specific adverse effects, it is common to rotate them. Sometimes drugs are combined with other drugs to make a preparation that is more helpful than an individual topical medication. Medications applied directly to the skin are the first course of treatment options. The main topical treatments are corticosteroids, vitamin D-3 derivatives, coal tar, anthralin, or retinoids. Start systemic medications together with the proper supportive measures. Oral retinoids, methotrexate, cyclosporine, 6-thioguanine, and hydroxyurea have been used with success. For generalized pustular psoriasis, systemic agents such as retinoids may be required from the beginning of treatment. This may be followed by PUVA treatment.

3. White Umbilicated Papules : Dermatology MCQ

What is the potential cause of small white umbilicated papules on the labia majora?a) Chlamydia D–K b) Haemophilus ducreyi c) Human papillomavirus d) Molluscum contagiosum e) Trichomonas vaginalisCorrect Answer: d) Molluscum contagiosum. This description is classical for molluscum. Haemophilus ducreyi often presents with multiple painful genital ulcers and lymphadenopathy.

4. HPV warts : Dermatology MCQ

What is currently the best treatment for mucosal human papillomavirus (HPV) warts (cervical, vaginal, urethral meatus, and anal)?

a) Cryotherapy with liquid nitrogen.
b) Trichloroacetic acid (TCA) 80% to 90%.
c) Bichloroacetic acid (BCA) 80% to 90%.
d) Surgical removal.

Correct Answer: a,b,c,d. All three regimens are provider-administered. They are 1) cryotherapy with liquid nitrogen, 2) trichloroacetic acid (TCA) or bichloroacetic acid (BCA) 80% to 90%, or 3) surgical removal. Although chances of reinfection are not clear, chances of recurrence following treatment are common, especially in the first three months following treatment. Choices for treatment should be made following a discussion with a provider who can present the risks and benefits of each recommended treatment regimen to help a patient make an informed decision about which regimen to use. (Ref: CDC).

5. Vulval Ulceration : Dermatology MCQ

17-year-old woman presents with vulval ulceration and difficulty in passing urine. She is sexually active and has had unprotected intercourse. She takes the combined oral contraceptive pill. What is the most likely diagnosis?a) Candida albicans b) Herpes simplex virus c) Herpes varicella virus d) Human papillomavirus e) SyphilisCorrect Answer: b) Herpes simplex virus. A painful genital ulcer has developed in a sexually active patient who has not used barrier contraception. Syphilis is usually associated with the presence of a painless ulcer. Candida is not a sexually transmitted disease and rarely presents with ulceration. Human papillomavirus causes warts, and herpes varicella zoster causes chicken pox and shingles.

6. Acne vulgaris contains all BUT the following

a) Sebum b) Keratin c) Viruses d) Bacteria e) LipasesCorrect Answer: c) Viruses. Acne develops as a result of blockages in the follicles. Hyperkeratinization and formation of a plug of keratin and sebum is the earliest change. Mixture of cells and sebum provides environment for Propionibacterium acnes. P.acnes produces an extracellular lipase.

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Dr. Niraj Mahajan

MD- Gynecologist, Laparoscopic Surgeon, Uro-gynecologist , Infertility specialist & Cosmetic Gynecologist.

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