Familial hyperplastic callus formation; case followed for twenty years.

The case here recorded was first described (Hilton 1934) under the title “ Familial Chondrodystrophy with Rheostosis Treated by X-ray Therapy. ‘ ‘ It is thought appropriate, in giving this up-to-date further account of the progress of the case, to substitute the description ‘ ‘ hyperplastic callus, ‘ ‘ because the main features of the present case conform with those observed in hyperplastic callus formation in osteogenesis imperfecta. The present account records the progress of the patient over a period of twenty years.