[Rare skeletal pathology: the diagnostic problems in the first year of life].

The authors report a series of affections which determine diffused modifications of the skeleton during early childhood. More common pathological forms are dealt with, of relatively simple diagnosis, and having pathological pictures which based on frequency, means of occurrence, and clinical-radiographic aspects, are rarely observed, and difficult to diagnose. Based on several clinical cases, the authors report problems related to diagnosis, emphasising the meaning of various radiographic pictures and the value and choice of hematochemical tests aimed at selecting patients in whom biopsy is required.