Cutaneous Immunology — MCQs

What is the primary function of Langerhans' cells?

A 32 year old man presents with a 3-month history of weight loss, night sweats, a productive cough with blood-tinged sputum, anorexia, general malaise, and a low grade fever. A PPD skin test shows > 10 mm of induration. If the area of induration were biopsied, which of the following type of reactive cells would be found?

A 60-year-old female presents with eczematous itching lesions. Biopsy revealed a subepidermal cleft with Direct Immunofluorescence showing Linear C3 & IgG deposition along the basement membrane zone. What is the likely diagnosis?

Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split. Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.

Most common precipitant of contact dermatitis is?

In a patient with the following lesion on scalp, what changes are seen in the nails?

In which of the following conditions is the Koebner phenomenon most commonly observed?

Patient on anti-TB drugs develops tender nodules on shins. Most likely diagnosis is:

Lines of Blaschko are related to?

Which sign is pathognomonic for neurofibromatosis?