What is sjs syndrome

What is Stevens-Johnson Syndrome?

Stevens-Johnson Syndrome (SJS) is a rare but life-threatening dermatological condition characterized by severe blistering and peeling of the skin and mucous membranes. It is considered a form of epidermal necrosis and typically affects less than 10% of the body surface area. SJS is a medical emergency requiring immediate hospitalization and intensive care management.

Symptoms and Presentation

SJS typically begins with non-specific symptoms including fever, malaise, sore throat, cough, and body aches, often resembling influenza. After 1-3 weeks, painful skin lesions appear, usually starting on the face, neck, and upper torso, then spreading to other areas. Characteristic features include target lesions (three-zone concentric rings), severe mucosal involvement affecting the mouth, eyes, and genitals, and rapid progression of blistering.

Causes and Triggers

The most common medications triggering SJS include antibiotics (particularly sulfonamides and penicillins), nonsteroidal anti-inflammatory drugs (NSAIDs), anticonvulsants (phenytoin, phenobarbital), and allopurinol. Infections, particularly herpes simplex virus and other pathogens, account for approximately 50% of cases. Genetic predisposition plays a significant role, with certain HLA alleles increasing susceptibility to specific drug triggers.

Diagnosis and Severity

Diagnosis is primarily clinical based on the distinctive appearance and distribution of lesions, though skin biopsy may confirm epidermal necrosis. SJS severity is classified by affected body surface area: SJS involves less than 10% of body surface, Toxic Epidermal Necrolysis (TEN) involves more than 30%, and SJS/TEN overlap involves 10-30%. Scoring systems like SCORTEN (Severity of Illness Score for TEN) help predict mortality risk.

Treatment and Management

Immediate treatment involves discontinuing the suspected causative agent and hospitalization for specialized wound care. Management includes fluid and electrolyte support, thermoregulation, nutritional support, pain management, and prevention of secondary infections. Some experts recommend systemic corticosteroids in early stages, though evidence remains controversial. Ophthalmologic and dermatologic consultation is essential due to the high risk of serious complications.