A 12-Year-Old Boy Is Brought to the Office Due to a Week

question 295

Multiple Choice

A 12-year-old boy is brought to the office due to a week of nonproductive cough and rash.  He has also had low-grade fevers, malaise, and headaches.  The patient has no prior medical conditions and is up to date with immunizations.  Lung examination reveals bilateral crackles and wheezes.  There is a diffuse rash on his torso and extremities as shown in the exhibit. 
Which of the following is the most likely cause of this patient's skin lesions?

• A)Cytotoxic T-cell-mediated epithelial injury
• B)Inflammatory reaction in subcutaneous fat
• C)Keratinocyte hyperproliferation and parakeratosis
• D)Subepidermal immunoglobulin A deposition
• E)Vasoactive mediator release from mast cells

---

Definitions:

Variable Cost

Costs that change in proportion with the level of output or production activity.

Fixed Costs

Overheads such as rent, salaries, and insurance that do not fluctuate with the level of goods produced or sold.

Variable Costs

Charges that vary in relation to the volume of output or services provided by a firm.

Fixed Costs

Expenses that do not change regardless of the level of production or business activity, such as rent, salaries, and insurance.