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Pityriasis amiantacea and psoriasis. A follow-up study
Dermatologica
|June 1, 1983
Summary
Pityriasis amiantacea (PA) is often linked to psoriasis. This study found a significantly higher incidence and predisposition to psoriasis in PA patients compared to the general population.
Area of Science:
- Dermatology
- Genetics
Background:
- Pityriasis amiantacea (PA) is a scalp condition characterized by thick, adherent scales.
- The association between PA and psoriasis requires further investigation.
Purpose of the Study:
- To investigate the prevalence of psoriasis in patients with pityriasis amiantacea (PA).
- To assess the genetic predisposition to psoriasis among PA patients.
Main Methods:
- A longitudinal follow-up study of 59 patients diagnosed with PA.
- Data collection included personal history of psoriasis and family history of psoriasis.
- Statistical comparison with Scandinavian and psoriatic patient populations.
Main Results:
- After an average 8-year follow-up, 15% of PA patients had developed psoriasis.
- 19% of PA patients had a known family history of psoriasis.
- PA patients showed a significantly higher incidence and predisposition to psoriasis compared to the general population, but lower than psoriatic patients.
Conclusions:
- Pityriasis amiantacea (PA) appears to be a manifestation of psoriasis in a significant number of cases.
- PA warrants consideration as a potential indicator for underlying or developing psoriasis.