Question

A child with history of fever, photosensitivity, rash sparing nasolabial fold presents to OP. Identify the condition?

• A. SLE
• B. Polymorphous light eruption
• C. Discoid lupus
• D. Skin tuberculosis

Answer 1

The Correct Option is A

Step 1: Severe itching, especially worse at night, together with the mite seen in the image, identifies infestation by $Sarcoptes$ $scabiei$.
Step 2: The parasite spreads through close skin contact, and the egg-laying female tunnels into the outer skin layer; the mite plus its debris and eggs drive the allergic itch.
Step 3: Lesions cluster in warm sheltered zones such as finger webs, wrists, axillae and genital folds, and may even hide beneath rings or watch straps.
Step 4: The alternatives have distinct patterns - extensor vesicles for dermatitis herpetiformis, dry scaling for xerotic eczema, and iris-shaped targets for erythema multiforme - so they are excluded.
\[\boxed{\text{Sarcoptes scabies}}\]