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

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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.

Key words： recruits intensive training growth plate injury MR imaging knee

Received: 13 August 2014

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	XIA Zhaoyun
	YAN Chaohui
	XU Rongtai

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XIA Zhaoyun,YAN Chaohui,XU Rongtai. MRI of injury of incomplete closed growth plate of knee in the recruits during military training[J]. Med. J. Chin. Peop. Armed Poli. Forc., 2015, 26(1): 60-63.

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http://journal08.magtechjournal.com/Jwk_wjyx/EN/ OR http://journal08.magtechjournal.com/Jwk_wjyx/EN/Y2015/V26/I1/60

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