MRI of the Os trigonum syndrome of the ankle after trauma and CT follow-up in general practice

Congress:

ECR 2013

Poster Number:

C-2619

Type:

Scientific Exhibit

Keywords:

Trauma, Diagnostic procedure, MR, CT, Musculoskeletal bone

Authors:

X. LI; Lanzhou/CN

DOI:

10.1594/ecr2013/C-2619

DOI-Link:

https://dx.doi.org/10.1594/ecr2013/C-2619

Fig. 1: STIR image shows a fluid-filled interface between the os trigonum and the...

Fig. 2: T1-weighted image show mild bone marrow oedema of os trigonum is found on both...

Fig. 3: CT of follow-up shows Subchondral cysts adjacent to the synchondrosis (arrow)...

Purpose

To study the prevalence of MRI finding of Os trigonum syndrome of the ankle after trauma and CT finding follow-up in general practice.

Methods and Materials

Patients 28 patients with Os trigonum syndrome were confirmed by MRI from 107 patients with trauma of ankle. 28 patients with trauma of Os trigonum syndrome of the ankle enrolmented into the study of follow-up between 09/2005 and 01/2012 (mean age 38years; range 17–63 years ,17 males and 11 female). all patients were examined immediately by MRI after trauma, all 28 patients were examined of follow-up by CT afterone year. All of the images underwent sign analysis by two experienced radiologist.The study was performed in...

Results

In 28 cases , imaging of being examined immediatelyafter trauma showed: soft twassue swelling of Os trigonum were 28 cases, inflammatory exudate effusion around the Os trigonum were 23 cases，bone marrow edema of Os trigonum were 17 cases , fascial thickening around the Os trigonum were12 cases(Fig1-2). But, 17 cases of bone marrow edema of Os trigonum were examined one year after trauma, CT showed hyperostoswas of the Os trigonum were 11 cases ,cystic change of the Os trigonum were 13 cases(Fig3), necrosis of the...

Conclusion

MRI has more valuable in diagnosis of Os trigonum syndrome , and bone marrow oedema on MRI for acute Os trigonum injury is strongly predictive of progression of hyperostosis , cystic change and degenerative change of the Os trigonum on follow-up CT one year after trauma.

References

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Personal Information

Li Xiaozhong , Department of Radiology，University Hospital of Gansu Traditional Chinese Medicine,No. 732 Jiayuguan West Road,Lanzhou730020, China.