This is a study of the case of 2 sisters, R. L. and L. L., who failed to grow after the age of 3 months. One of the children lived until 2½ years of age, and the other is still living at 7 years. These cases should be of special interest to pediatricians, for, of all branches of medicine, pediatrics is the one which concerns itself with growth and development. In every-day practice the physician looks on his infant patients with pride, as they gain an ounce a day, double and triple their birth weight, sit, stand and later walk and talk, in keeping with the normal physiologic process of growth and development. These siblings defied the laws of nature and remained, both in growth and in development, at practically the same stage as at birth.
A study of these unusual sisters reveals a combination of factors which may explain