Toxic Epidermal Necrolysis

What is TEN?

Toxic epidermal necrolysis, or TEN, is a rare but life-threatening skin and mucosal reaction, most often triggered by medication. It is characterized by extensive skin damage, blistering, skin detachment, and involvement of the mouth, eyes, or genital mucosa. TEN is considered part of the same disease spectrum as Stevens-Johnson syndrome but is more extensive. ^[1][2][3]

Symptoms and urgent warnings

Early symptoms may include fever, sore throat, burning eyes, and malaise, followed by a painful rash, blistering, and peeling skin. Mucosal involvement can make swallowing, urination, or eye opening difficult. Because this is a medical emergency, painful widespread rash with blistering or skin detachment requires urgent hospital assessment. ^[1][2]

Causes and risk factors

Medication exposure is the most important trigger. High-risk drug groups vary, but certain anticonvulsants, antibiotics, gout medicines, and other drugs are classically associated. Not everyone taking these medicines is at risk, but when TEN develops, rapid drug review becomes essential. ^[1][2][3]

Diagnosis and hospital evaluation

Diagnosis is based on the clinical picture and often confirmed with specialist assessment and sometimes skin biopsy. Because TEN can affect fluid balance, temperature regulation, infection risk, and mucosal surfaces, hospital-level care is required. ^[1][3]

How is it treated?

Treatment involves immediate withdrawal of the suspected drug, supportive hospital care, wound and fluid management, pain control, infection prevention, and specialist involvement. Some patients require intensive care or burn-unit style care. Eye care is especially important because long-term ocular complications can occur. ^[1][2][3]

Recovery and prevention

Recovery can be prolonged, and follow-up may be needed for skin, eye, and other complications. A drug believed to have triggered TEN should not be restarted unless a specialist clearly advises otherwise. Proper documentation of the reaction is important for future safety. ^[1][2]