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

Area of Science:

• Radiopharmaceutical therapy
• Histopathology
• Joint disease research

Background:

• Synoviorthesis involves intraarticular injection of radioisotopes for therapeutic purposes.
• Investigating the long-term effects of radioisotopes on synovial tissues is crucial for understanding treatment outcomes and potential complications.

Observation:

• Microscopic examination of surgically removed synovial tissues was performed.
• Metallic deposits of gold-198 (198Au) were observed up to five years post-injection.
• Evidence of fibrotic and necrotic changes were noted in the synovial tissues.

Findings:

• Gold-198 (198Au) deposits were microscopically detectable for up to five years after intraarticular injection.
• Yttrium-90 (90Y) was not microscopically detected in the examined synovial tissues.
• The presence of necrotic cartilage inclusions within the synovial membrane suggests potential cartilage damage induced by 90Y.

Implications:

• The persistence of 198Au deposits indicates long-term retention within the joint.
• The observed tissue changes (fibrosis, necrosis) highlight potential adverse effects of radioisotope synoviorthesis.
• Further investigation is warranted to clarify the role of 90Y in cartilage disturbances and optimize synoviorthesis protocols.