Reference work entry
DOI: https://doi.org/10.1007/3-540-29662-X_1290


A very thick form of eczema often distributed on the palms and rarely on the soles of the feet. Male gender is most often affected. Described as "mud drying in the river bed" the plaques of yellow brown dense scales tend to increase in thickness forming deep interconnecting cracks. Below the surface of these dry scales they are firmly attached to the epidermis. Causes may be multiple, most are idiopathic while some are allergic, excroriation, or irritation related. Most cases last for years and can be treated like chronic eczema. Recurrence is frequent.

Differential Diagnosis

Psoriasis and lichen simplex chronicus should be part of any differential.


  1. Habif T (1996) Clinical Dermatology, 3rd ed. MD Consult, p 59Google Scholar

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