# A nurse is assessing a 28-year-old patient who was admitted with suspected Stevens-Johnson syndrome (SJS). Which assessment finding would be most indicative of SJS progression and require immediate intervention?

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> subject: Adult Health

## 문제

A nurse is assessing a 28-year-old patient who was admitted with suspected Stevens-Johnson syndrome (SJS). Which assessment finding would be most indicative of SJS progression and require immediate intervention?

The nurse is conducting a comprehensive assessment of a patient with suspected Stevens-Johnson syndrome.

## 보기

1. Target-like lesions on extremities with mild oral discomfort and intact skin
2. Scattered erythematous patches on trunk with slight skin tenderness and no mucosal involvement
3. Extensive mucosal involvement with conjunctival erythema and oral erosions covering more than 30% of the oral cavity **✔ 정답**
4. Localized skin blistering on hands and feet with intact epidermis and no mucosal lesions

**정답: 3**

## 해설

Extensive mucosal involvement covering over 30% of the oral cavity indicates severe SJS progression requiring immediate intervention. Other options describe milder findings like target lesions or localized blistering not indicative of urgent progression.

## 심화 해설

Clinical Reasoning and Core Pathophysiology

Stevens-Johnson syndrome (SJS) and its more severe counterpart, toxic epidermal necrolysis (TEN), represent a spectrum of severe, life-threatening mucocutaneous reactions most commonly triggered by medications. The underlying pathophysiology involves widespread keratinocyte apoptosis, mediated by drug-specific cytotoxic T cells and the release of granulysin, leading to full-thickness epidermal necrosis and detachment. The clinical hallmark that distinguishes SJS/TEN from other less severe drug eruptions, such as erythema multiforme, is the presence and extent of mucosal involvement. In SJS/TEN, mucosal erosions are often painful, hemorrhagic, and can affect the ocular, oral, and genital surfaces. The degree of mucosal involvement is a critical indicator of disease severity and progression, as extensive denudement of these surfaces leads to significant complications, including severe pain, inability to maintain oral intake, fluid and electrolyte imbalance, and a high risk of infection and long-term scarring sequelae, particularly in the eyes. The systematic review of clinical guidelines emphasizes that supportive care focused on aggressive mucosal management is a cornerstone of treatment to prevent these devastating complications .

Analysis of Assessment Findings

When assessing a patient with suspected SJS, the nurse must rapidly differentiate early or limited skin findings from signs that herald progression to a severe, systemic reaction. The best evidence on skin-mucosal care highlights that the severity of mucosal involvement directly correlates with morbidity and guides the urgency of interventions, including potential transfer to a burn or intensive care unit . Let's analyze the findings in each option:

- **Option 1:** Target-like lesions on extremities with mild oral discomfort and intact skin. Target lesions are more classically associated with erythema multiforme, which is typically a milder, self-limiting condition with minimal to no mucosal involvement. Intact skin and only "mild" oral discomfort do not signal the extensive epithelial necrosis characteristic of progressive SJS.

- **Option 2:** Scattered erythematous patches on trunk with slight skin tenderness and no mucosal involvement. The absence of mucosal involvement is the key differentiator here. SJS/TEN is defined by its mucocutaneous nature. A presentation with only skin findings, even with tenderness, is not indicative of SJS progression.

- **Option 3:** Extensive mucosal involvement with conjunctival erythema and oral erosions covering more than 30% of the oral cavity. This finding is the most alarming and indicative of SJS progression. It demonstrates the classic, severe mucosal disease that defines the syndrome. Conjunctival erythema signals acute ocular involvement, which is a medical emergency requiring immediate ophthalmology consultation to prevent corneal ulceration and blindness. Oral erosions covering a significant percentage of the mucosa place the patient at immediate risk for airway compromise from edema, inability to manage secretions, and severe nutritional and fluid deficits. This constellation of findings demands immediate, escalated interventions [1,2].

- **Option 4:** Localized skin blistering on hands and feet with intact epidermis and no mucosal lesions. While blistering can occur in SJS/TEN, the localization to extremities and, most importantly, the absence of any mucosal lesions make this presentation inconsistent with progressive SJS. The "intact epidermis" further suggests a lack of the widespread necrolysis that characterizes the disease.

Immediate Nursing and Clinical Implications

The patient described in option 3 is demonstrating a high-risk progression of SJS. The immediate nursing priority is to ensure airway patency and hemodynamic stability, as the extensive oral and conjunctival mucosal involvement signals a systemic process that can rapidly involve the respiratory epithelium. This patient requires immediate notification of the provider and the rapid response team if signs of respiratory distress are present. Aggressive supportive care, as outlined in the evidence summaries, must be initiated without delay. This includes strict fluid and electrolyte management, meticulous wound care using non-adherent dressings to denuded skin and mucosal surfaces, nutritional support often requiring nasogastric tube placement due to severe oral erosions, and mandatory ophthalmology consultation for the acute conjunctival involvement. The systematic review of guidelines underscores that early and aggressive mucosal care is not merely a comfort measure but a critical intervention to reduce mortality and prevent long-term sequelae such as blindness and strictures [1,2].

## 임상 시나리오

SJS Progression AssessmentKey Findings Requiring Immediate Intervention
The most critical indicator of Stevens-Johnson syndrome (SJS) progression is extensive mucosal involvement. Assess for oral erosions covering more than 30% of the oral cavity and conjunctival erythema.

Mucosal damage leads to severe pain, inability to maintain oral intake, and high risk for fluid/electrolyte imbalance and infection. Ocular involvement can cause long-term scarring and vision loss.

CautionDo not dismiss early mucosal signs. Immediate intervention includes stopping the causative drug, aggressive wound care, fluid resuscitation, and ophthalmology consultation to prevent permanent sequelae.

## 핵심 개념

- **Stevens-Johnson syndrome (SJS)** — A rare, life-threatening mucocutaneous hypersensitivity reaction characterized by extensive necrosis and detachment of the epidermis, often involving mucous membranes.
- **Epidermal detachment** — Separation of the epidermis from the dermis, a critical sign of SJS/TEN severity, often assessed as a percentage of body surface area involved.
- **Mucosal involvement** — Erosions or ulcerations affecting mucous membranes such as the oral cavity, conjunctiva, or genitalia, a hallmark of SJS progression.
- **Erythema multiforme (EM)** — A distinct hypersensitivity reaction presenting with typical target lesions and minimal mucosal involvement, often with intact skin, and less severe than SJS.
- **Body surface area (BSA)** — The percentage of total skin surface affected by lesions, used to classify severity in SJS/TEN spectrum disorders.

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