Spongiosis
Pronunciation: spon-jee-OH-sis
Intercellular oedema of the epidermis characterised by fluid accumulation between keratinocytes, widening the intercellular spaces.
Full Definition
Spongiosis refers to the histopathological finding of intercellular oedema within the epidermis, where excess fluid separates adjacent keratinocytes and stretches the desmosomes that hold them together. It is a hallmark feature of eczematous or spongiotic dermatitis and is visible on haematoxylin and eosin (H&E)-stained sections. In its early stages, spongiosis produces subtle intercellular widening; in severe cases it progresses to vesicle formation. Editors reviewing dermatopathology reports must distinguish this from acantholysis, which involves desmosome rupture rather than simple fluid accumulation. The term is always lowercase in running prose.
Usage
Usage note: Always used as a histopathological descriptor; do not use interchangeably with 'oedema' in a clinical (non-histological) context.
In Context
- "Histological examination revealed prominent spongiosis and scattered eosinophils consistent with acute contact dermatitis." — Dermatopathology report
- "The biopsy demonstrated mild spongiosis without vesicle formation, supporting a diagnosis of subacute eczema." — Clinical case summary