Yokoe Takuji, Tajima Takuya, Ouchi Koki, Yamaguchi Nami, Morita Yudai, Chosa Etsuo
Division of Orthopaedic Surgery, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, University of Miyazaki, Kiyotake, Miyazaki, Japan.
Orthop J Sports Med. 2024 Mar 25;12(3):23259671241237255. doi: 10.1177/23259671241237255. eCollection 2024 Mar.
Studies have evaluated types of retromalleolar groove using axial magnetic resonance imaging at the level of 10 mm above the tip of the lateral malleolus. However, no evidence is available to support that this level is appropriate for evaluating retromalleolar groove morphology.
To assess the influence of the level of axial computed tomography (CT) scans on the assessment of retromalleolar groove morphology.
Cross-sectional study; Level of evidence, 3.
The study population included 122 patients (mean age, 27.9 ± 11.8 years; 69 males, 53 female) who underwent CT scans to evaluate foot or ankle pathologies between 2020 and 2023. The shape of the retromalleolar groove (concave, flat, convex, or irregular) at 3 levels of axial CT scans (8, 10, and 12 mm above the tip of the lateral malleolus) was assessed independently by 2 orthopaedic surgeons. The length from the tip of the lateral malleolus to the proximal tip of the fossa of the lateral malleolus was also measured on coronal CT scans.
The type of retromalleolar groove was significantly different according to the level of CT scans (8 vs 10 mm, = .0001; 10 vs 12 mm, = .0001; 8 vs 12 mm, = .001). The type of retromalleolar groove was the same at all 3 levels in 31.1% of patients (38/122). The length from the tip of the lateral malleolus to the proximal tip of the fossa of the lateral malleolus was <10 mm in 17.2% of patients (21/122).
The shape of the retromalleolar fibular groove was affected by the level at which the CT scan was obtained. Approximately 70% of the patients showed different types of retromalleolar grooves among the 3 CT scan levels.
已有研究使用踝关节外侧尖上方10毫米水平的轴向磁共振成像评估踝后沟的类型。然而，尚无证据支持该水平适合评估踝后沟形态。
评估轴向计算机断层扫描（CT）扫描水平对踝后沟形态评估的影响。
横断面研究；证据等级，3级。
研究人群包括122例患者（平均年龄27.9±11.8岁；男性69例，女性53例），他们在2020年至2023年间接受CT扫描以评估足或踝关节病变。由2名骨科医生独立评估轴向层面（踝关节外侧尖上方8、10和12毫米）的踝后沟形状（凹形、扁平形、凸形或不规则形）。还在冠状面CT扫描上测量了从踝关节外侧尖到外踝窝近端尖的长度。
根据CT扫描水平，踝后沟类型存在显著差异（8毫米与10毫米，P = .0001；10毫米与12毫米，P = .0001；8毫米与12毫米，P = .001）。31.1%的患者（38/122）在所有3个层面的踝后沟类型相同。17.2%的患者（21/122）从踝关节外侧尖到外踝窝近端尖的长度小于10毫米。
踝后腓骨沟的形状受CT扫描层面的影响。大约70%的患者在3个CT扫描层面中显示出不同类型的踝后沟。
