ULTRASONOGRAPHIC FOLLOW-UP OF THE HEALING-PROCESS OF MEDICALLY TREATED HYPERTROPHIC PYLORIC-STENOSIS

In hypertrophic pyloric stenosis (HPS), prompt pyloromyotomy is, in ge neral, the treatment of choice. There has been no information availabl e as to the natural history of the pyloric tumour. We present four inf ants with medically treated HPS who were followed by sonography to obs erve the anatomical changes that occur with atropine sulfate. The init ial change was shortening of the pyloric canal, followed by thinning o f the muscular layer as clinical symptoms improved.