within 100 years , the interpretation of this disease changed repeatedly and considerably : infection of particularly exposed organs -- non-avirulent tuberculosis -- salivotropic virus -- boeck 's disease -- allergic-hyperergic reaction -- diencephalic and nervous dystrophy with segmental projection -- ( auto ) immune disease -- oculo-salivary complex including sjogren 's syndrome -- all these were discussed as possible aetiologies .
C0020517
allergic
C0021053
immune disease