Sean Klepper M.D.
Stephen Lyle, M.D., ...
- Spongiotic dermatitis is not a specific diagnosis, but rather a form of tissue reaction to injury encompassing a number of disease entities.
- The spongiotic tissue reaction has traditionally been divided into three histologic stages: acute, subacute and chronic. Some authors question the utility of this classification.
- The chronic phase is quite easy to misdiagnose, as spongiosis is minimal to absent, and it closely resembles the psoriasiform pattern.
- Histologic features include hyperkeratosis with focal parakeratosis, hypergranulosis and psoriasiform hyperplasia (acanthosis with the rete ridges extending down to approximately the same level).