ROSH Dermatology 2 Review Practice Questions 2024.

ROSH Dermatology 2 Review Practice Questions 2024. A 60-year-old woman presents to the clinic with a unilateral vesicular rash on an erythematous base for the past three days. She says that the rash was preceded by a burning pain in the same distribution. Which of the following is the most likely diagnosis? Allergic contact dermatitis Herpes zoster Impetigo Varicella - correct answer Herpes zoster Herpes zoster is caused by a reactivation of latent varicella zoster virus in the sensory ganglia. The classic presentation of herpes zoster is a dermatomal vesicular rash and acute neuritis, which usually precedes the rash. Which of the following describes part of the pathogenesis of acanthosis nigricans? Hypersensitivity reaction Insulin resistance Proliferation of melanocytes Superficial bacterial infection - correct answer Insulin resistance Acanthosis nigricans is a common and benign disorder that typically presents with hyperpigmented plaques on the skin. There are a variety of endocrine (diabetes mellitus, polycystic ovarian syndrome, Cushing syndrome, acromegaly), metabolic, genetic, and malignant disorders that may contribute to the development of acanthosis nigricans, and an evaluation of the underlying cause should always be performed. A 20-year-old man presents to the clinic with a fluctuant abscess at the superior aspect of the intergluteal cleft. He is diagnosed with a pilonidal abscess. Which of the following is a risk factor for this condition? Active lifestyle Having a low BMI Increased hair density in the natal cleft region Smoking cigarettes - correct answer Increased hair density in the natal cleft region Intergluteal pilonidal disease is an infection involving the skin and subcutaneous tissue at or near the upper part of the gluteal cleft of the buttocks. It is likely due to friction on the skin overlying the natal (gluteal) cleft. Damage to hair follicles creates a port of entry for hair and debris. A 32-year-old woman presents to the clinic with a pruritic diffuse rash one hour after eating a crab cake. The lesions are well-circumscribed, raised, erythematous, and have a circular shape. Which of the following is the most likely diagnosis?