Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Sep 17;8(9):2325967120946697.
doi: 10.1177/2325967120946697. eCollection 2020 Sep.

Both Magnetic Resonance Imaging and Computed Tomography Are Reliable and Valid in Evaluating Cystic Osteochondral Lesions of the Talus

En Deng  1 , Lixiang Gao  2 , Weili Shi  1 , Xing Xie  1 , Yanfang Jiang  1 , Huishu Yuan  2 , Qinwei Guo  1
Affiliations

Both Magnetic Resonance Imaging and Computed Tomography Are Reliable and Valid in Evaluating Cystic Osteochondral Lesions of the Talus

En Deng et al. Orthop J Sports Med. .

Abstract

Background: Compared with computed tomography (CT), magnetic resonance imaging (MRI) might overestimate the condition of osteochondral lesions of the talus (OLTs) owing to subchondral bone marrow edema and the overlying cartilage defect. However, no study has compared MRI and CT directly in evaluating OLTs with subchondral cysts.

Purpose: To compare the reliability and validity of MRI and CT in evaluating OLTs with subchondral cysts.

Study design: Cohort study (diagnosis); Level of evidence, 2.

Methods: An institutional radiology database was queried for inpatients diagnosed with OLTs with subchondral cysts who had undergone surgical treatment between May 2015 and October 2019. A total of 48 patients met the inclusion criteria. Based on our measurement method, 2 experienced observers who were blinded to the study independently measured the length, width, and depth of the cysts using MRI and CT. The classification of cystic lesions was also performed based on MRI and CT findings.

Results: Interobserver reliability was almost perfect, with intraclass correlation coefficients (ICCs) ranging from 0.935 to 0.999. ICCs for intraobserver reliability ranged from 0.944 to 0.976. The mean size of cysts measured on MRI (length, 13.38 ± 4.23 mm; width, 9.28 ± 2.28 mm; depth, 11.54 ± 3.69 mm) was not significantly different to that evaluated on CT (length, 13.40 ± 4.08 mm; width, 9.25 ± 2.34 mm; depth, 11.32 ± 3.54 mm). The size of subchondral cysts was precisely estimated on both MRI and CT. The MRI classification and CT classification revealed almost perfect agreement (kappa = 0.831).

Conclusion: With our measurement method, both MRI and CT were deemed to be reliable and valid in evaluating the size of subchondral cysts of OLTs, and the MRI classification was well-correlated with the CT classification. The presented measurement method and classification systems could provide more accurate information before surgery.

Keywords: cysts; measurement; osteochondral lesion; talus.

PubMed Disclaimer

Conflict of interest statement

One or more of the authors has declared the following potential conflict of interest or source of funding: This work was supported by grants from the National Natural Science Foundation of China (No. 81672153) and the Beijing Municipal Science & Technology Commission (No. Z161100000116072). AOSSM checks author disclosures against the Open Payments Database (OPD). AOSSM has not conducted an independent investigation on the OPD and disclaims any liability or responsibility relating thereto.

Figures

Figure 1.
Figure 1.
Diameter measurement on computed tomography (CT) and magnetic resonance imaging (MRI): (A) coronal CT, (B) sagittal CT, (C) axial CT, (D) coronal MRI, (E) sagittal MRI, and (F) axial MRI. In this case, the maximum length, width, and depth of the cyst on CT were 11.2, 9.2, and 10.9 mm, respectively, and those on MRI were 11.4, 9.3, and 11.4 mm, respectively.
Figure 2.
Figure 2.
The cysts were classified into 3 types on computed tomography (CT): (A) Type I, (B) Type II, (C) Type III, and magnetic resonance imaging (MRI): (D) Type I, (E) Type II, (F) Type III, respectively.
See this image and copyright information in PMC

References

    1. Choi WJ, Park KK, Kim BS, Lee JW. Osteochondral lesion of the talus: is there a critical defect size for poor outcome? Am J Sports Med. 2009;37:1974–1980. - PubMed
    1. Easley ME, Latt LD, Santangelo JR, et al. Osteochondral lesions of the talus. J Am Acad Orthop Surg. 2010;18:616–630. - PubMed
    1. Elias I, Zoga AC, Morrison WB, et al. Osteochondral lesions of the talus: localization and morphologic data from 424 patients using a novel anatomical grid scheme. Foot Ankle Int. 2007;28:154–161. - PubMed
    1. Giannini S, Vannini F. Operative treatment of osteochondral lesions of the talar dome: current concepts review. Foot Ankle Int. 2004;25:168–175. - PubMed
    1. Guo QW, Hu YL, Jiao C, Yu CL, Ao YF. Arthroscopic treatment for osteochondral lesions of the talus: analysis of outcome predictors. Chin Med J. 2010;123:296–300. - PubMed

LinkOut - more resources