Peripheral Lesions of the Triangular Fibrocartilage Complex.

Area of Science:

• Orthopedic Surgery
• Radiology
• Anatomy

Background:

• The triangular fibrocartilage complex (TFCC) is crucial for wrist stability.
• The recently introduced CUP classification categorizes TFCC lesions into central (C), ulnar (U), and peripheral (P) types.
• Peripheral TFCC lesions involve specific anatomical structures and can occur independently or with other injuries.

Purpose of the Study:

• To illustrate typical peripheral triangular fibrocartilage complex lesions using the CUP classification.
• To review the anatomical components of the peripheral TFCC.
• To discuss imaging modalities for peripheral TFCC lesions.

Main Methods:

• Pictorial review of peripheral TFCC lesions.
• Correlation with the CUP classification system.
• Description of relevant anatomy and pathology.

Main Results:

• Peripheral TFCC lesions commonly affect the meniscus homologue and dorsal capsule.
• Imaging techniques like MRI and CT/MR arthrography are utilized for assessment.
• Arthroscopic evaluation of peripheral lesions has limitations.

Conclusions:

• Peripheral TFCC lesions have distinct anatomical considerations.
• Radiologic assessment is key for diagnosing peripheral TFCC injuries.
• Further data on the clinical relevance of radiologic reporting is needed.