Size distribution of lymphocytes in juvenile rheumatoid arthritis.

The diameters of circulating peripheral lymphocytes were measured in 28 children with 
juvenile rheumatoid arthritis. These were compared with lymphocyte measurements in 68 
normal children, 19 children with asthma, and 12 children with cystic 
fibrosis. The average diameter of lymphocytes in normal children was found 
to be 11.2 microns. In contrast, the average diameter of lymphocytes 
in juvenile rheumatoid arthritis was 12.7 microns (P less than 0.0001). 
There were more lymphocytes with a diameter of 13 to 15 
microns in children with juvenile rheumatoid arthritis than in normal children. 
