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Q10.

How will you manage a case of Stevens-Jhonson Syndrome in an adult?

How to Approach

This question requires a systematic approach to managing a severe dermatological emergency. The answer should focus on initial assessment, stabilization, supportive care, and specific therapies. It’s crucial to outline the stages of management – acute phase, and post-acute phase/recovery. Mentioning differential diagnoses and potential complications is also important. The answer should demonstrate understanding of the pathophysiology and the rationale behind each intervention. A structured approach using headings and subheadings will enhance clarity.

Model Answer

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Introduction

Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) are rare, life-threatening severe cutaneous adverse reactions, most commonly triggered by medications. SJS is characterized by mucocutaneous involvement with less than 10% total body surface area (TBSA) detachment, while TEN involves greater than 30% TBSA detachment. Overlap SJS/TEN exists between 10-30% TBSA detachment. Prompt recognition and aggressive management are crucial to improve patient outcomes. This answer will detail the comprehensive management of SJS in an adult patient, encompassing initial assessment, stabilization, and ongoing care.

I. Initial Assessment and Diagnosis

The initial assessment is paramount. A thorough history should be taken, focusing on medication use (including over-the-counter drugs and herbal remedies) in the weeks preceding symptom onset. Physical examination should document the extent of epidermal detachment, mucosal involvement (oral, ocular, genital), and systemic symptoms.

  • Diagnostic Criteria: Diagnosis is primarily clinical, based on the characteristic appearance of target lesions, widespread epidermal detachment, and mucosal involvement.
  • Differential Diagnosis: Rule out other conditions like scalded skin syndrome, bullous pemphigoid, and viral exanthems.
  • Scoring Systems: SCORTEN (Severity-of-Illness Score for Toxic Epidermal Necrolysis) can be used to assess prognosis and guide management.

II. Acute Phase Management (First 72 Hours)

The acute phase focuses on resuscitation and preventing secondary complications.

A. Resuscitation and Stabilization

  • Fluid Resuscitation: Aggressive intravenous fluid resuscitation is critical to counteract fluid loss from the damaged skin. Guided by urine output and hemodynamic parameters.
  • Electrolyte Management: Monitor and correct electrolyte imbalances (sodium, potassium, calcium, magnesium).
  • Pain Management: Adequate analgesia is essential. Opioids may be required, but careful monitoring for respiratory depression is necessary.
  • Wound Care: Similar to burn management. Sterile dressings (e.g., silver sulfadiazine, biosynthetic dressings) should be applied to prevent infection. Avoid adherent dressings.
  • Temperature Regulation: Maintain normothermia.

B. Supportive Care

  • Nutritional Support: Early enteral nutrition is preferred. If not possible, parenteral nutrition should be considered.
  • Respiratory Support: Monitor for airway compromise due to mucosal swelling. Intubation and mechanical ventilation may be required.
  • Ocular Care: Frequent lubrication with artificial tears and ophthalmological consultation are crucial to prevent corneal damage and blindness.
  • Infection Control: Strict infection control measures are essential. Prophylactic antibiotics are generally *not* recommended, but monitor closely for secondary infections (pneumonia, sepsis, wound infections).

C. Specific Therapies

  • Causative Agent Withdrawal: Immediately discontinue all suspected medications.
  • Intravenous Immunoglobulin (IVIG): May be considered, particularly early in the course, but evidence is mixed. Dosage varies (typically 1-2 g/kg over several days).
  • Corticosteroids: Controversial. Some studies suggest benefit with early use, but others show increased risk of infection. Use should be individualized.
  • Cyclosporine: Emerging evidence suggests potential benefit, particularly in early stages.

III. Post-Acute Phase and Recovery

Once the epidermal detachment stabilizes, the focus shifts to wound healing, preventing complications, and rehabilitation.

  • Continued Wound Care: Continue sterile dressings and monitor for infection.
  • Skin Grafting: Consider skin grafting for large areas of denuded skin.
  • Physical Therapy: Prevent contractures and maintain joint mobility.
  • Psychological Support: SJS/TEN can be emotionally traumatic. Provide psychological support and counseling.
  • Long-Term Follow-up: Monitor for long-term sequelae, such as skin pigmentary changes, scarring, and ocular complications.

IV. Monitoring and Complications

Close monitoring is essential to detect and manage potential complications.

  • Sepsis: Early recognition and aggressive treatment are crucial.
  • Acute Respiratory Distress Syndrome (ARDS): Requires mechanical ventilation and supportive care.
  • Multiple Organ Dysfunction Syndrome (MODS): Manage supportively.
  • Ocular Complications: Dry eye, corneal ulcers, and blindness.
  • Scarring and Contractures: Require physical therapy and potentially surgical intervention.

Conclusion

Managing Stevens-Johnson Syndrome requires a multidisciplinary approach, encompassing prompt diagnosis, aggressive resuscitation, meticulous supportive care, and consideration of specific therapies. Early identification of the causative agent and its removal are paramount. Close monitoring for complications and long-term follow-up are essential to optimize patient outcomes. While mortality rates have decreased with improved care, SJS/TEN remains a serious and potentially life-threatening condition. Further research is needed to refine treatment strategies and improve prognosis.

Answer Length

This is a comprehensive model answer for learning purposes and may exceed the word limit. In the exam, always adhere to the prescribed word count.

Additional Resources

Key Definitions

SCORTEN
Severity-of-Illness Score for Toxic Epidermal Necrolysis. A scoring system used to assess the severity of SJS/TEN and predict mortality risk. It incorporates factors like age, TBSA detachment, heart rate, creatinine, bicarbonate, and glucose levels.
Toxic Epidermal Necrolysis (TEN)
A severe, life-threatening skin reaction characterized by widespread epidermal detachment, typically caused by a medication. It is distinguished from Stevens-Johnson Syndrome (SJS) by the percentage of body surface area affected.

Key Statistics

The incidence of SJS is estimated to be 1-6 cases per million person-years, while TEN occurs in 0.4-1.2 cases per million person-years.

Source: American Academy of Dermatology (as of 2023 knowledge cutoff)

Medications are responsible for approximately 90% of SJS/TEN cases, with antibiotics, anticonvulsants, and allopurinol being the most common culprits.

Source: Bastuji-Garin et al., Arch Dermatol. 1993;129(4):400-407 (as of 2023 knowledge cutoff)

Examples

Allopurinol-Induced SJS

A 65-year-old male with gout developed SJS 2 weeks after starting allopurinol. He presented with fever, mucositis, and widespread epidermal detachment. Allopurinol was immediately discontinued, and he was admitted to the burn unit for supportive care and wound management.

Frequently Asked Questions

Is there a specific antidote for SJS/TEN?

No, there is no specific antidote. Treatment is primarily supportive, focusing on managing symptoms, preventing complications, and removing the causative agent.

Topics Covered

MedicineDermatologyEmergency MedicineSkin ReactionsDiagnosisTreatmentSJS