Congenital hypertrophic pyloric stenosis in phenotypic female twins with X-XX mosaicism.

a total of 11 months and though his height and weight remain below the 3rd centiles his rate of growth has subsequently increased. Biopsy of one of the plantar nodules 2 months after stopping prednisolone showed only hyperkeratosis. The results of lung function tests immediately after stopping prednisolone showed that the lungs were no longer stiff but that the airways resistance had increased further. Despite this the arterial oxygen tension had risen to normal levels. Five months later the airways obstruction was less marked (Table). It is now 21 months since the onset of the disease and 10 months since all treatment was stopped; there are no signs of a relapse.