Distinction Between Toxic Epidermal Necrolysis and Staphylococcal Scalded Skin Syndrome

Clinical and Histopathological Differences

The key distinction between Toxic Epidermal Necrolysis (TEN) and Staphylococcal Scalded Skin Syndrome (SSSS) is based on the level of exfoliation, with SSSS having intraepidermal cleavage at the granular layer and TEN having subepidermal cleavage 1, 2
In SSSS, skin detachment occurs at the granular layer, resulting in intraepidermal cleavage 1, 2
In TEN, necrotic epidermis separates from the underlying dermis, producing a subepidermal cleavage 1, 2
This difference in cleavage plane can be confirmed by skin biopsy or frozen section of a blister roof to distinguish between the conditions 1, 2
TEN typically presents with prominent mucosal involvement of eyes, mouth, nose, and genitalia, leading to erosive and hemorrhagic mucositis 1, 2
SSSS characteristically lacks mucosal involvement, which is a key clinical feature that distinguishes it from TEN 1, 2

Consider TEN when there is presence of cutaneous pain as an early feature and mucosal involvement (eyes, mouth, nose, genitalia) 1, 2
Consider SSSS when there is absence of mucosal involvement 1, 2
Skin biopsy with histopathological examination is the definitive method to distinguish between these conditions 1, 2

TEN management includes immediate discontinuation of the culprit drug and supportive care similar to burn management 1

Misdiagnosing one condition for the other can lead to inappropriate treatment strategies 1, 2
Failure to perform a skin biopsy when the diagnosis is uncertain may delay appropriate management 1, 2
Not recognizing the absence of mucosal involvement as a key distinguishing feature of SSSS 1, 2
In TEN, there is extensive epidermal necrosis with basal cell vacuolar degeneration, resulting from an immune-mediated reaction 3, 4
TEN affects all age groups, with mortality being higher in adults than in children 2