Toxic epidermal necrolysis induced by COVID-19.

Toxic epidermal necrolysis (TEN) is a life-threatening acute mucocutaneous syndrome. It is characterized by keratinocyte necrosis and apoptosis, which affect more than 30% of the body's surface. TEN is most commonly due to an altered immunological response to specific drugs, infections, and malignancies, or it can be idiopathic.