RT Journal A1 TRUESDALE PE T1 HErnia of the diaphragm in children JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1929 FD November 16 VO 93 IS 20 SP 1538 OP 1544 DO 10.1001/jama.1929.02710200022006 UL http://dx.doi.org/10.1001/jama.1929.02710200022006 AB It seems appropriate that the subject of diaphragmatic hernia should be discussed before the Section on Diseases of Children. The activities of pediatricians begin at the foundation of life. Nature's imperfections are carefully charted in the records of their patients. No anomaly within range of vision escapes detection. Yet search for internal defects is made only when there is evidence that leads one to suspect their presence or during an exploration of one of the body cavities either by operation or at autopsy. Unless the roentgen ray is used in the examination of children, anomalies of congenital origin, such as those of the diaphragm, remain concealed, and until at least a fluoroscopic examination of infants is made as a routine, we shall not know the incidence of either eventration or congenital hernia of the diaphragm.The diaphragm, dormant during fetal life, responds at birth. It ushers in the phenomena of