Collins Mark S, Tiegs-Heiden Christin A, Frick Matthew A
Department of Radiology, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA.
Skeletal Radiol. 2020 Dec;49(12):1957-1963. doi: 10.1007/s00256-020-03494-w. Epub 2020 Jun 18.
To characterize the MRI findings present in patients with clinically proven or suspected jogger's foot.
Ten years of medical charts in patients clinically suspected of having jogger's foot and who had MRI studies completed were identified utilizing a computer database search. Six study cases were identified. The MRI examinations of the study cases and an age- and gender-matched control group were reviewed in a blinded fashion by two musculoskeletal radiologists. Size and signal intensity of the medial plantar nerve were measured and characterized. The medial foot musculature was assessed for acute or chronic denervation changes.
The medial plantar nerve was found to have moderately increased T2 signal compared with normal skeletal muscle in 3/6 study group cases and markedly increased T2 signal in the remaining 3/6 cases. In all control cases, the nerve was reported to have T2 signal equal or minimally higher than normal skeletal muscle. The mean total size of the medial plantar nerve was significantly larger in the study group when compared with that in the control group at all measured locations (p < 0.04).
Abnormal thickness and T2 hyperintensity of the medial plantar nerve centered at the master knot of Henry are characteristic MRI findings in patients with jogger's foot when compared with control subjects. Muscular denervation changes may also be seen, most commonly in the flexor hallucis brevis muscle.
描述经临床证实或疑似患有慢跑者足的患者的MRI表现。
利用计算机数据库搜索，确定了临床疑似患有慢跑者足且已完成MRI检查的患者的十年病历。共识别出6例研究病例。两名肌肉骨骼放射科医生以盲法对研究病例及年龄和性别匹配的对照组的MRI检查进行了评估。测量并描述了足底内侧神经的大小和信号强度。评估了足内侧肌肉组织的急性或慢性去神经变化。
在研究组的6例病例中，3例足底内侧神经的T2信号与正常骨骼肌相比中度增加，其余3例T2信号明显增加。在所有对照病例中，据报告该神经的T2信号等于或略高于正常骨骼肌。在所有测量部位，研究组足底内侧神经的平均总大小均显著大于对照组（p < 0.04）。
与对照组相比，以亨利主结为中心的足底内侧神经厚度异常和T2高信号是慢跑者足患者的特征性MRI表现。也可能出现肌肉去神经变化，最常见于拇短屈肌。
