PP - CLINICAL AND RADIOLOGICAL EVALUATION OF PATIENTS AFFECTED BY FLORID OSSEOUS DYSPLASIA: A MULTICENTER RETROSPECTIVE STUDY

Florid osseous dysplasia (FOD) is a fibro-osseous disease characterized by multifocal gradual substitution of normal bone by fibrous connective tissue and/or cementum-like masses that mainly affects black-skinned women. This study aims to evaluate the clinic-radiological features of FOD diagnosed in a series of patients retrieved from three countries. A total of 118 patients diagnosed with FOD from Brazil (n=65), USA (n=23), and South Africa (n=30) were selected. Females represented 98.3% of the sample, the mean age of the patients was 52.3 years, and 74% were black-skinned. The distribution of ethnicity/skin color was different among countries, with 94%, 86%, and 61% of cases from the USA, South Africa, and Brazil, respectively, affecting black-skinned patients. FOD affected patients presenting lesions radiologically classified as initial (7%), intermediate (43%), and late (50%) with mean ages of 40.1, 48.1, and 57.8 years, respectively. Analysis of these preliminary data shows that the stage of the disease is correlated with the age of the patients and that diagnosis is usually done in advanced ages, in stages with more obvious radiopacity. The frequent racial miscegenation seen in Brazil could be the reason for the difference in ethnical distribution when comparing the three countries.