1 Middlesex Memorial Hospital, 33 Pleasant Street, Middletown, Connecticut
A previously undetected transverse ridge the fingernails of normal infants has been described as first appearing at the proximal nail at 4 to 6 weeks of age. The ridge grows out to the free edge of the nail by 14 weeks of age. The intent of this report is to call attention to the fact that the ridge exists. The clinical significance of this finding, if any, awaits more extensive observation.