HEREDITARY multiple exostoses are a distinct clinical entity more frequently encountered than is generally appreciated. We have recently had the opportunity of studying 4 members of a Negro family who had the condition. Few cases occurring in Negroes are reported in the American literature.1 2 3 To our knowledge this is the first Negro family studied and reported. The cases were typical in both the clinical and roentgenologic aspects, varying, of course, in degree. It was our intention originally to include total protein, dextrose tolerance, calcium, phosphorus and other hormonal excretion studies in the investigation. Owing to circumstances beyond our control it . . .