Two cases of spreading skull fracture in infants aged four and 12 mont
hs, respectively, are: reported. Both patients developed a gradually i
ncreasing swelling of the scalp in the wake of a head injury. Radiogra
phs showed a bony defect. Herniation of brain tissue through the defec
t and a porencephalic cavity were demonstrated by computed tomography.
The ventricles were dilated in one of the patients. Patients younger
than three years of age who have a separated skull fracture should rec
eive followup physical examinations and, if needed, radiographs aimed
at detecting progressive lesions at an early stage.