Hereditary Ectodermal Dysplasia

Of late years, a considerable amount of attention has been given in America and Germany to that class of case which has been variously termed 'combined defects of hair and teeth,' 'malformations simultanees du svsteme dentaire et du systeme pileux,' and 'dystrophy of the hair and nails.' More recently the more comprehensive term 'congenital ectodermal defect ' has been used, and still more recently, Weech 5, to whom I am indebted for much of the biblio- graphy of this subject, has suggested 'hereditary ectodermal dysplasia ' as the most suitable title.