[Pilomatrixoma. Review of 179 cases]

We introduce a study about 179 cases of Pilomatrixioma, registered in the archives from General Hospital "Vall d'Hebrón" of Barcelona between 1972-1988. Tumour of pediatric presentation, about 502 of cases have been observed in young people under 20 years, being both sexes almost equally affected percentually. About 75% of cases appear a a a single tumour smaller than 15 mm of diameter. Multiple presentation is observed only in the 2.8 of cases. A bit more than the 50% of cases are located in the head and the neck, usually in the preauricular region. Next follow upper extremities (27%), lower extremities (11%), and the rest of the body (6.7%). Recidivation appear only in the 0.55% of cases.