4()() 



J. JOWSEY 



Fig. 10. A, low-power (X 9), and B, high-power (X 30) microradiographs 

 of a cro.ss section through the fibula of a 9-year-old male with vitamin D-re- 

 sistant rickets, showing the porosity, unmineralized cement lines (a), and 

 lack of mineral around lacunae and canaliculi {h and c). 



