Comparative study of reticuloendothelial system pools of the normal and immunologically activated rabbit synovium with radiocolloids.

A quantitative study of the uptake of radiocolloids by the joint synovium relative to other reticuloendothelial system organs was performed in the rabbit model. The radiocolloids of 198Au and 99mTc-sulfide colloid were administered intravenously and distribution in synovial pad, liver, spleen, bone marrow, blood, lung, and other tissues was determined in a gamma counter. The uptake of radiocolloids by both normal and immunologically activated synovial pad was very small in comparison with the reticuloendothelial cells in liver, spleen, and bone marrow.