Lateral discoid meniscus in the pediatric knee: imaging features and tear patterns

Area of Science:

• Orthopedic Surgery
• Radiology
• Anatomy

Background:

• Lateral discoid meniscus is the most common congenital variant of the meniscus.
• It presents with varied abnormalities in size, shape, collagen structure, and mobility.
• These features increase susceptibility to degeneration and tearing.

Purpose of the Study:

• To review the anatomy of the lateral discoid meniscus.
• To highlight critical MRI findings for radiology reports.
• To guide clinical management of this condition.

Main Methods:

• Narrative review of existing literature.
• Discussion of anatomical variations.
• Analysis of diagnostic MRI features.

Main Results:

• Detailed description of lateral discoid meniscus anatomy.
• Identification of specific MRI characteristics indicative of discoid morphology.
• Emphasis on findings predicting meniscal instability and degeneration.

Conclusions:

• Accurate identification of lateral discoid meniscus on MRI is crucial.
• Specific MRI findings aid in differentiating normal from abnormal menisci.
• Radiological reporting should focus on features guiding surgical and non-surgical management.