A nurse is assessing a patient with suspected Stevens-Johnson syndrome (SJS). Which assessment finding would be most indicative of this condition?

Stevens-Johnson syndrome is characterized by widespread skin detachment with positive Nikolsky's sign and mucosal involvement, distinguishing it from other skin conditions. Other options describe localized rashes, pustular lesions, or scaling patches not typical of SJS.

Clinical Judgment This question assesses the ability to identify the key clinical signs of Stevens-Johnson Syndrome (SJS), a severe drug-induced skin reaction. The key point is that SJS is not a simple skin rash but a systemic illness involving the mucous membranes, requiring you to Notify HCP!. Option 1, "Mucosal involvement with painful erosions in the mouth and conjunctiva," is the Critical Cue for SJS. Painful erosions in the mouth and conjunctiva pose a direct risk to the patient's swallowing, nutritional intake, and vision, and are a warning sign of progression to toxic epidermal necrolysis (TEN). The other options represent different conditions (e.g., venous stasis dermatitis of the lower extremities, urticaria, herpes zoster) and are thus distinguished from SJS. Memory Tip: When remembering SJS, think of the mnemonic: Stevens-Johnson Syndrome = Serious Sloughing of Skin & Slime membranes (mucous membranes). Alternatively, you can emphasize that mucosal involvement is essential with "Mucosal Must Matter." KR vs US: In Korea, anticonvulsants and allopurinol tend to be emphasized more as causative drugs for SJS/TEN, whereas in the US NGN, comprehensive awareness of all potential triggering drugs (sulfonamides, NSAIDs, antibiotics, etc.) and the importance of verifying the medication history are equally stressed. Additionally, in US nursing practice, when assessing mucosal involvement (especially oral), the oral intake amount is quantitatively documented along with the pain score, and the need for an urgent ophthalmology consultation is more actively emphasized.