Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (17): 3148-3151.doi: 10.3969/j.issn.1673-8225.2012.17.025

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Diffusion-weighted magnetic resonance imaging study on herniation pit of femoral neck

Dong Jie1, 2, Zhang Yu1, Li Jun2, Zhou Zhen3, Li Hai-mei1, Sang Chun-yu1, Lin Tie-qiao1, Liu Chun-hong2   

  1. 1Affiliated Fuxing Hospital of Medical Capital University, Beijing  100038, China; 2Affiliated Anding Hospital of Medical Capital University, Beijing  100088, China; 3School of Biomedical Engineering, Medical Capital University, Beijing 100038, China
  • Received:2011-07-09 Revised:2011-09-15 Online:2012-04-22 Published:2012-04-22
  • Contact: Liu Chun-hong, Associate Chief physician Affiliated Anding Hospital of Medical Capital University, Beijnig 100088, China chunhongliu11@163.com
  • About author:Dong Jie, Attending physician, Affiliated Fuxing Hospital of Medical Capital University, Beijing 100038, China; Affiliated Anding Hospital of Medical Capital University, Beijing 100088, China
  • Supported by:

     Talents Project of Organization Department of the Beijing Municipal Committee*

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Abstract:

BACKGROUND: At present, the report on the characteristics of water diffusion of femoral neck herniation pit by using magnetic resonance diffusion imaging is still rare.  
OBJECTIVE: To evaluate the femoral neck herniation pit and normal femoral neck by apparent diffusion coefficient (ADC) and to investigate the diffusion coefficient, imaging findings and pathogenesis of the femoral neck herniation pit.
METHODS: The data of 18 cases of herniation pits proved by pathology or typical imaging manifestations were analyzed. All patients underwent conventional magnetic resonance imaging and diffusion-weighted imaging as well as CT and X-ray observation. The abnormal regions on the diffusion-weighted images were outlined by using the conventional magnetic resonance imaging or CT as guides, and the ADCs were calculated. The ADC differences between herniation pits and the femoral neck were compared.
RESULTS AND CONCLUSION: Twenty herniation pits of the femoral neck were found in 18 cases. The lesions were round, oval or “8”-shaped subcortical defects which were located in the anterior lateral base part of femoral head or the femoral neck. X-ray plain film showed a round radiolucency with a thin clear sclerotic rim. CT scans showed a well-defined lesion. Magnetic resonance imaging displayed low signal intensity on T1WI and high signal intensity on T2WI. The mean ADC was markedly greater in the herniation pits than that in the normal femoral neck. Diffusion-weighted imaging can provide valuable information for regarding the diffusion properties of herniation pit of the femoral neck, and markedly increased diffusion and ADC were identified in herniation pit of the femoral neck.

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