Deficiency of kappa- or lambda-type immunoglobulins.

It is widely recognized that immunoglobulins, as the carriers of antibody activity, 
play an important role in the defense of the individual against 
infections. The known cases of kappa or lambda light chain type 
immunoglobulin deficiencies are heterogenous with regard to clinical and immunological findings. 
There are also a number of similarities which may suggest common 
underlying factors. The accurate investigation of additional patients, if available, should 
provide more insight into the basis of kappa or lambda type 
immunoglobulin deficiencies. 