Synovial plicae of the knee

Area of Science:

• Orthopedics
• Anatomy
• Embryology

Background:

• Synovial plicae are normal knee structures, remnants of embryonic synovial tissue.
• They partition the knee joint but can become symptomatic when thickened, leading to plicae syndrome.
• Abnormal plicae can present as complete septa, causing intra-articular compartmental syndromes.

Purpose of the Study:

• To describe the anatomy and embryology of synovial plicae.
• To correlate abnormal plicae with clinical and radiographic findings.
• To review various clinical entities associated with synovial plicae.

Main Methods:

• Review of anatomical and embryological literature on synovial plicae.
• Analysis of clinical case studies and radiographic evidence of abnormal plicae.
• Synthesis of information on plicae syndrome and related intra-articular conditions.

Main Results:

• Synovial plicae are present in up to 60% of adult knees.
• Pathological thickening can lead to symptomatic plicae syndrome.
• Embryonic remnants can form septa causing compartmental syndromes.

Conclusions:

• Synovial plicae have a significant role in knee joint development and pathology.
• Understanding their embryological origins aids in recognizing clinical presentations.
• Abnormal plicae are associated with specific knee pain syndromes and require accurate diagnosis.