Objective Analysis the MR imaging characteristics of ankle joint chronic injuries in asymptomatic pro-fessional soccer players. Methods The eighteen professional soccer players from Tianjin local region soccer club were se-lected as research subjects from March to May 2017. All subjects can normally participate in training and competition, and no ankle joint symptoms within six months. 3.0 T MRI was used to obtain MR images. The athletes' foot bones, ligaments, and tendons were evaluated. The incidence of structural damages between striking foot and support foot were compared us-ing Fisher's exact test. Results Bone injuries were mainly bone marrow edema, cystic change, loose bodies, and irregular osteoid bumps. Bone marrow edema was identified in 12 persons in 17 ankle joints (striking foot10, support foot 7);loose bodies in 3 persons in 3 ankle joints (striking foot 1, support foot 2);posterior ostrigonum of talus in 7 persons in 7 ankle joints (striking foot 5, support foot 2);irregular osteoid bumps in 2 person in 2 ankle joints (striking foot 1, support foot 1). There was no significant difference in incidence of bony injury between striking foot and support foot (all P>0.05). The me-dial deltoid ligament injure was identified in 5 persons in 5 ankle joints (striking foot 2, support foot 3);anterior talofibular ligament injure in 17 persons in 25 ankle joints (striking foot 8, support foot 17);calcaneofibular ligament injure in 9 per-sons in 12 ankle joints (striking foot 5, support foot 7); anterior tibiofibular ligament injure in 1 person in 1 ankle joint (striking foot);no posterior talofibular ligament and posterior tibiofibular ligament injure was found. Incidence rate of anteri-or talofibular ligament injure was higher in support foot than striking foot (P=0.003). There was no significant difference in injury of the other ligaments between striking foot and support foot (all P>0.05). Tendon sheath effusion was the main man-ifestation of tendon injuries. The flexor hallucis longus tendon sheath effusion was found in 17 persons in 26 ankle joints (striking foot 12, support foot 14); flexor digitorum longus tendon sheath effusion in 8 persons in 10 ankle joints (striking foot 5, support foot 5);tibialis posterior tendon sheath effusion in 9 persons in 12 ankle joints (striking foot 5, support foot 7);peroneus longus and peroneus brevis tendon sheath effusion in 4 persons in 4 ankle joints (striking foot 2, support foot 2);extensor digitorum longus tendon sheath effusion in 2 person in 2 ankle joint (striking foot 1, support foot 1);no anterior tibialis tendon sheath effusion, extensor hallucis longus tendon sheath effusion, and Achilles tendon effusion were found. There was no significant difference in incidence of effusion between striking foot and support foot (all P>0.05). Conclusion Hard trainings and competitions is easily lead to repeated ankle injuries in the professional soccer players, the primary fea-tures were bone marrow edema, cystic change, ligament injury, and tendon sheath effusion. Injury characteristics between striking foot and support foot may be different, because the different function of different foot.%目的 分析职业足球运动员足踝关节无症状慢性损伤的MR影像特点.方法 募集2017年3月—5月间18名天津当地足球俱乐部的现役运动员作为研究对象,均可正常参加训练和比赛,且至本次检查6个月内均无足踝关节不适症状.采用3.0 T MRI进行踝关节扫描,观察每位运动员踝关节的骨质、韧带、肌腱情况.采用Fisher精确检验比较触球足和立足足踝关节不同结构损伤情况的发生率.结果 骨质损伤主要表现为骨髓水肿、囊变、关节游离体形成及不规则骨突形成.其中骨髓水肿共12例17个踝关节(触球足10个,立足7个);3例3个踝关节(触球足1个,立足2个)可见关节游离体形成;7例7个踝关节(触球足5个,立足2个)出现距后三角骨.2例2个踝关节(触球足、立足各1个)可见距骨后突.触球足组和立足组间骨质损伤发生率差异均无统计学意义(均P>0.05).内侧三角韧带损伤5例共5个踝关节(触球足2个,立足3个);距腓前韧带损伤17例共25个踝关节(触球足8个,立足17个);跟腓韧带损伤9例12个踝关节(触球足5个,立足7个);下胫腓前韧带损伤1例1个踝关节(触球足);未见距腓后韧带、下胫腓后韧带损伤病例.立足组距腓前韧带损伤发生率高于触球足组(P=0.003).其余韧带损伤发生率,2组间差异无统计学意义(均P>0.05).肌腱损伤主要表现为腱鞘积液,踇长屈肌腱腱鞘积液17例26个踝关节(触球足12个,立足14个);趾长屈肌腱腱鞘积液8例10个踝关节(触球足5个,立足5个);胫骨后肌腱腱鞘积液9例12个踝关节(触球足5个,立足7个);腓骨长短肌腱腱鞘积液4例4个踝关节(触球足2个,立足2个);趾长伸肌腱腱鞘积液2例2个踝关节(触球足1个,立足1个).未发现胫骨前肌腱、踇长伸肌腱腱鞘积液及跟腱周围积液.触球足组和立足组间腱鞘积液发生率差异均无统计学意义(均P>0.05).结论 职业足球运动员艰苦的训练和比赛容易造成踝关节反复创伤,主要特点为骨髓水肿、囊变,韧带损伤及腱鞘积液.由于双足在足球运动中功能不同,触球足和立足损伤特点亦不同.
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