SCIENTIFIC PROCEEDINGS. 



Abstracts of Communications. 

 One hundred twentieth meeting. 



College of Physicians and Surgeons, January 18, IQ22. 

 President Wallace in the chair. 



72 (1819) 



Is there more than one kind of rickets? 1 



By E. A. PARK, P. G. SHIPLEY, E. V. MCCOLLUM and NINA SIMMONDS. 



[From the Department of Pediatrics, Yale University, New Haven, 

 Conn., the Department of Pediatrics, Johns Hopkins 

 University, and the Department of Chemical 

 Hygiene, Johns Hopkins University, 

 Baltimore, Md.] 



I. Clinical observations suggesting the existence 



OF MORE THAN ONE KIND OF RICKETS. 



For at least two years our attention has been attracted to the 

 possibility that there might be more than one kind of rickets. 

 We were led to think of this possibility as the result of the con- 

 sideration of certain peculiar manifestations of the disease and 

 associations with other diseases. The facts are as follows : Rickets 

 occurs with great frequency in premature children, even when 

 breast fed. It seems to affect the head more than the extremities 

 or ribs. In a group of cases of rickets the disease shows an especial 

 tendency to involve the shafts of the long bones declaring itself 

 clinically by the occurrence of multiple fractures from trivial 

 causes. There is a curious association between rickets and certain 

 forms of secondary anemia (the so-called alimentary anemias and 



1 Abstract presented at the one hundred nineteenth meeting of the Society for 

 Experimental Biology and Medicine. 



149 



