Phototherapeutic Agents — MCQs

Replacing alanine by which amino acid, will increase UV absorbance of protein at 280 nm wavelength?

How does narrowband UVB therapy work in psoriasis?

Treatment of choice for Pustular psoriasis is:

Dermatological manifestation of which of the following diseases?

An 8-year-old girl has extreme photosensitivity since birth. She has recently been diagnosed with skin cancer. What is the diagnosis?

A 6-year-old child born to consanguinity has pallor and intolerance to sunlight. His urine was exposed to Wood's light. Probable diagnosis is:

A 55-year-old woman presents with painful oral erosions and minimal skin involvement for 3 months. Nikolsky sign is positive on the oral mucosa. Serum is sent for autoantibody testing. Histology of a perilesional biopsy shows suprabasal acantholysis with a tombstone row of basal keratinocytes (Image). In this predominantly mucosal variant of pemphigus vulgaris, which autoantibody titre best correlates with mucosal disease activity and guides decisions about tapering systemic immunosuppression?

A 24-year-old man presents to the emergency department with a 3-day history of a rapidly spreading rash on his hands and forearms. He had a cold sore on his lip 10 days ago. He denies any new medications. There is no mucosal involvement. The rash is shown (Image 2). Which of the following statements best describes the underlying immunopathological mechanism responsible for this eruption?

Dapsone is used in which of the following conditions?

A male presents with an erythematous patch over the penis after taking an over-the-counter medication. What is the most likely causal drug?