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Related Experiment Video

Updated: Jun 14, 2026

Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis

Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis

Published on: September 2, 2025

Post-traumatic chylous knee effusion.

Masamichi Tahara¹, Akira Katsumi, Tsutomu Akazawa

¹National Hospital Organization Chiba East Hospital, Japan. tah@qk9.so-net.ne.jp

|March 23, 2010

Summary

This summary is machine-generated.

This case study details a rare instance of posttraumatic chylous knee effusion in a young male. Prompt arthroscopic intervention confirmed the diagnosis and led to a full recovery, highlighting the condition

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Area of Science:

Orthopedics
Rheumatology
Pathology

Background:

Chylous joint effusion is a rare condition characterized by milky synovial fluid due to high lipid content.
Posttraumatic causes are infrequent, necessitating differential diagnosis from infectious or inflammatory arthritis.

Observation:

A 19-year-old male presented with significant knee swelling after trauma.
Aspiration revealed milky fluid; arthroscopic examination showed yellow-white lesions resembling cobwebs.
Pathology revealed xanthoma cells and fat necrosis, confirming chylous effusion.

Findings:

Arthroscopic biopsy and debridement were crucial for diagnosis and treatment.
Microscopic analysis confirmed numerous fat globules in the synovial fluid.
The patient experienced complete recovery within two weeks post-surgery.

Implications:

Posttraumatic chylous effusion is typically self-limiting.
Arthroscopic intervention aids in diagnosis and accelerates recovery.
It is essential to rule out infectious or tuberculous arthritis in initial assessments.