Radioscapholunate Ligament
Description
Name
- Radioscaphocapitate Ligament
- Radioscapholunate Ligament
- RSL Ligament
- Radioscapholunate Capsular Ligament
- Ligament of Testut
- Testut Ligament
General
- Large, intracapsular, extrinsic palmer radiocarpal ligament
- Palmer stabilizer of the wrist joint
Gross Anatomy
- Origin: palmar surface of the distal radius
- Insertion: scaphoid, capitate
- Runs in an oblique orientation, contributing to the radial and radiocarpal joint capsule
- Runs adjacent and parallel to volar radiotriquetral ligament
Ultrasound Features
- Transducer: volar aspect of radial side of wrist, slightly extended
- Start in longitudinal plane and rotate towards capitate
- Ligament appears as echogenic, fibrillary structure attaching distal radius to lunate, capitate
MRI Features
- Best appreciated on coronal or sagittal cuts
- Appearance is hypointense, striated[3]
- Interligament sulcus can be delineated as a fluid intense structure
Clinical Significance
- Nondissociative Carpal Instability (CIND)
- Midcarpal Instability (MCI)
- Scapholunate ligament injury
- Scapholunate instability
- Perilunate dislocation
- Perilunate fracture-dislocation
- Dorsal intercalated segment instability (DISI)
- Scapholunate advanced collapse (SLAC wrist)
See Also
References
- ↑ Case courtesy of Matt Skalski, Radiopaedia.org, rID: 43845
- ↑ Pillemer, Roger, and Roger Pillemer. "Examination for Specific Conditions of the Wrist." Handbook of Upper Extremity Examination: A Practical Guide (2022): 109-122.
- ↑ Bateni C, Bartolotta R, Richardson M, Mulcahy H, Allan C. Imaging Key Wrist Ligaments: What the Surgeon Needs the Radiologist to Know. AJR Am J Roentgenol. 2013;200(5):1089-95.