MRI findings of anatomical variations of the talus

doi:10.12307/2021.098

Abstract

Abstract: BACKGROUND: In previous studies, only X-ray or CT imaging was used to describe the anatomical variations of the talus, but MRI has not provided a unified and specific description.
OBJECTIVE: To describe the MRI characteristics of anatomical variations of the talus and observe the MRI characteristics of the ankle impingement syndrome caused by the variations of the talus.
METHODS: The MRI findings of the First Affiliated Hospital, University of South China in the past three years were retrospectively analyzed. One of the objectives was to describe edema or structural changes associated with anatomical variations in talus. Patients with tumors of talus or infections of talus were excluded in this study.
RESULTS AND CONCLUSION: (1) Totally 500 patients were finally included in the study, among which 24 patients showed anatomic variations, the incidence of anatomic variations was 4.8%. The variations of talus on MRI were talar beak (2 cases), talocalcaneal bridge (6 cases), bone island (1 case), and os trigonum (15 cases). (2) Talar beak, talocalcaneal bridge and os trigonum had a certain relationship between ankle joint impingement syndrome. (3) The posterior process of talus varied from person to person. They could be categorized as long tail, middle tail, short tail, and tailless. (4) The incidence rate of posterior ankle discomfort was the highest in the os trigonum group, and the lowest in the tailless type of talus. There was no significant difference in incidence rate between the os trigonum group and the long tail type of talus.

Key words: talus, anatomical variation, magnetic resonance imaging, bone marrow edema, signal intensity, ankle joint impingement syndrome, posterior process of talus

CLC Number:

Yi Meizhi, Luo Guanghua, Xiao Yawen, Hu Rong, Chen Xiaolong, Zhao Heng. MRI findings of anatomical variations of the talus[J]. Chinese Journal of Tissue Engineering Research, 2021, 25(24): 3888-3893.

Figures/Tables 8

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