| Title |
MRI appearance of surgically proven abnormal accessory anterior–inferior tibiofibular ligament (Bassett’s ligament)
|
|---|---|
| Published in |
Skeletal Radiology, October 2007
|
| DOI | 10.1007/s00256-007-0390-7 |
| Pubmed ID | |
| Authors |
Naveen Subhas, Emily N. Vinson, R. Lee Cothran, James R. Santangelo, James A. Nunley, Clyde A. Helms |
| Abstract |
A thickened accessory anterior-inferior tibiofibular ligament (Bassett's ligament) of the ankle can be a cause of ankle impingement. Its imaging appearance is not well described. The purpose of this study was to determine if the ligament could be identified on magnetic resonance imaging (MRI), to determine associated abnormalities, and to determine if MRI could be used to differentiate normal from abnormal. Eighteen patients with a preoperative ankle MRI and an abnormal Bassett's ligament reported at surgery were found retrospectively. A separate cohort of 18 patients was selected as a control population. The presence of Bassett's ligament and its thickness were noted. The integrity and appearance of the lateral ankle ligaments, talar dome cartilage, and anterolateral gutter were also noted. In 34 of the 36 cases (94%), Bassett's ligament was identified on MRI. The ligament was seen in all three imaging planes and most frequently in the axial plane. The mean thickness of the ligament in the surgically abnormal cases was 2.37 mm, compared with 1.87 mm in the control with a p value=0.015 (t test). Nine of the 18 abnormal cases (50%) had talar dome cartilage lesions as a result of contact with the ligament at surgery, with only 3 cases of high-grade defects seen on MRI. Fourteen of the 18 abnormal cases (78%) had of synovitis or scarring in the lateral gutter at surgery, with only 5 cases with scarring seen on MRI. The anterior-inferior tibiofibular ligament was abnormal or torn in 8 of the 18 abnormal cases (44%) by MRI and confirmed in only 3 cases at surgery. Bassett's ligament can be routinely identified on MRI and was significantly thicker in patients who had it resected at surgery. An abnormal Bassett's ligament is often present in the setting of a normal anterior-inferior tibiofibular ligament. The cartilage abnormalities and synovitis associated with an abnormal Bassett's ligament are poorly detected by conventional MRI. |
Mendeley readers
The data shown below were compiled from readership statistics for 55 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Switzerland | 2 | 4% |
| United States | 1 | 2% |
| United Kingdom | 1 | 2% |
| Unknown | 51 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Professor > Associate Professor | 9 | 16% |
| Other | 8 | 15% |
| Researcher | 8 | 15% |
| Professor | 5 | 9% |
| Student > Bachelor | 4 | 7% |
| Other | 17 | 31% |
| Unknown | 4 | 7% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 40 | 73% |
| Nursing and Health Professions | 5 | 9% |
| Biochemistry, Genetics and Molecular Biology | 1 | 2% |
| Business, Management and Accounting | 1 | 2% |
| Sports and Recreations | 1 | 2% |
| Other | 3 | 5% |
| Unknown | 4 | 7% |