Hereditary palmoplantar keratoderma, type papulosa, in Croatia.
BACKGROUND
Hereditary palmoplantar keratoderma (HPPK), type papulosa, is rare, and epidemiologic data are sporadic and inconsistent. An epidemiologic population study of this disease has not been performed previously.


OBJECTIVE
We performed a large population study on prevalence of HPPK, type papulosa, in Croatia.


METHODS
The data were collected from medical records of dermatology departments throughout Croatia; 14 patients and their relatives were examined. Histopathologic studies were performed in 11 of these 14 patients.


RESULTS
Fifty-five patients were identified and the prevalence was 1.17 per 100,000 inhabitants. All 55 patients belonged to 20 different families. An autosomal dominant mode of inheritance was confirmed in 13 families. All 14 patients examined by the authors had both palmar and plantar lesions; the volar aspects of fingers were also involved. Thickened nails were observed in four patients, and no significant skin lesions were found elsewhere.


CONCLUSIONS
HPPK, type papulosa, is rare, and its prevalence in Croatia is about four times lower than HPPK, Unna-Thost type. It should be considered a distinct entity.
Stanimirović
A
A
Department of Dermatology and Venereology, Medical School of Zagreb University, Croatia.
Kansky
A
A
Basta-Juzbasić
A
A
Skerlev
M
M
Beck
T
T
D000293:Adolescent; D000328:Adult; D002675:Child, Preschool; D017523:Croatia / Q000453:epidemiology; D005192:Family Health; D005260:Female; D006801:Humans; D007223:Infant; D007645:Keratoderma, Palmoplantar / Q000453:epidemiology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D015995:Prevalence