[Morphological changes in the articular capsule tissue after preliminary synoviorthesis]

Synovial tissues, surgically removed after synoviorthesis, were investigated microscopically. 198Au metallic desposits were seen until five years after the intraarticular injection. Light fibrotic changes were present, however these tissues exhibited also necrotic changes. 90Y could not be detected microscopically. Inclusions of necrotic cartilage in the synovial membrane may indicate cartilage disturbances due to 90Y. Osmium acid was identified by Xray-microanalysis.