A case of suspected atypical inflammatory keratosis in a toy poodle

Abstract

A 1-year-old spayed female toy poodle presented with systemic pruritus, keratinized papules with well-defined and thick scales, and erythema plaques. Considering the breed and characteristics of the exanthema, the results of various tests and a histopathological assessment of a skin biopsy, we suspected this was a case of inflammatory keratosis. The signalment, distribution of the exanthema, and histopathological examination did not completely match any of the previously reported types of inflammatory keratosis: lichenoid keratosis, psoriasiform lichenoid dermatosis, or idiopathic lichenoid dermatosis. We considered the possibility that there may be a type of inflammatory keratosis that can not be classified into the three previously reported types. It seems necessary to accumulate cases in the future for comparison with each type of inflammatory keratosis in dogs, and the investigation of the existence of subtypes that can not be classified.