MRI of injury of incomplete closed growth plate of knee in the recruits during military training
XIA Zhaoyun1, YAN Chaohui2, XU Rongtai1
1.Department of Radiology, 2.Department of Ultrasound, Jiangsu Provincial Corps Hospital, Chinese People’s Armed Polices Forces, Yangzhou 225003, China
Abstract：Objective To study MRI performance and characteristics of the incomplete closed growth plate injury of knee in the recruits during intensive training. Methods Retrospective analysis was made of MRI of growth plate injury of 36 recruits knees in military training. Tanner’s grading of the growth plate closure degree was used, and adopting S-H (Salter-Harris, S-H) Ⅰ～Ⅶ classification of the growth plate damaged was adopted. Results (1)There were 39 pieces of growth plate injury among 36 cases(knee):10 pieces in the distal femora and 29 pieces in the proximal tibia, including 6 pieces of 3 cases of the femur and tibia injuries at the same time on them. (2) Tanner’s staging of the closure degree displayed growth plate in 36 recrruits by imaging: 19 of 39 were degree 1, 17 were degree 2, 3 were degree 3. (3) S-H classification: 2 of 39 were typeⅡ, 5 were type Ⅲ, 4 were type Ⅳ, 22 were type Ⅴ and 6 were typeⅥ. There were no typeⅠand type Ⅶ.(4) MRI signal of hemorrhage and edema were displayed in the acute phase of growth plate injury.MRI signals changed with time, could manifest signals of more than short T2, such as T2 and long T2. However, edema relieved or subsided in the later, stage and MRI signal displayed a variety of changes with the pathological events such as bleeding absorbed, necrosis, cystic degeneration and fiberosis of damaged tissue of growth plate. (5) Followed up by imaging: 27 pieces were closed over the same period of the unaffected side in the growth plate injury of 39 pieces. 12 pieces of growth plate were asynchronously closed (early 4, delayed 8) , which were the damage of typeⅤ. In shape, 21 pieces were of normal form. The rest of the 18 changed in the form (local bone hypertrophy or similar bone bridge form 9, non-uniform thickness and thinning 9). 11 of 18 were the damage of the type Ⅴ.(6)Good clinical prognosis in 29 cases of 36 cases. 7 cases with joint deformity (knee varus 2, knee valgus 4, limb slightly shorter 1), they were of typeⅤ. Conclusions The incompletely closed growth plate of knee may be damaged during the recruit military training. Most occurred at the beginning of the training and only one side of knee. Recruits are relatively young, their growth plate closure degree is low and susceptible to injury mostly of type Ⅴ. Timely clinical treatment promises good prognosis.
夏兆云, 颜朝晖, 徐荣泰. 新兵集训期膝关节未完全闭合生长板损伤的MRI表现与特点[J]. 武警医学, 2015, 26(1): 60-63.
XIA Zhaoyun, YAN Chaohui, XU Rongtai. MRI of injury of incomplete closed growth plate of knee in the recruits during military training. Med. J. Chin. Peop. Armed Poli. Forc., 2015, 26(1): 60-63.
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2015, Vol. 26 
