Subchondral Cysts of the Humeral Head: MR Imaging Findings.
10.3348/jkrs.1999.40.2.329
- Author:
Yeong Cheol YOON
1
;
Kyung Nam RYU
;
Yup YOON
;
Yong Girl RHEE
Author Information
1. Department of Diagnostic Radiology, College of Medicine, Kyung Hee University, Korea.
- Publication Type:Original Article
- Keywords:
Shoulder, MR;
Shoulder, abnormalities;
Magnetic Resonance(MR), arthrography;
Bones, cyst
- MeSH:
Bone Cysts*;
Dislocations;
Humans;
Humeral Head*;
Incidence;
Injections, Intra-Articular;
Joints;
Magnetic Resonance Imaging*;
Retrospective Studies;
Shoulder
- From:Journal of the Korean Radiological Society
1999;40(2):329-332
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the findings of subchondral cyst of the humeral head, as seen on shoulder MRarthrography MATERIALS AND METHODS: Sixty-three patients( M:F=62:1 ; mean age 23 years) who underwent shoulder MRarthrography between September 1996 and May 1998 were retrospectively reviewed. No patient had a history of eithershoulder dislocation or certain diseases known to be commonl accompanied by subchondral cysts. All MR images wereobtained using a 1.5 Tesla unit after intraarticular injection of 20ml of diluted contrast material. T1 andT2-weighted axial, oblique coronal, and oblique sagittal images were analysed for the presence, location, number,shape, size, and connection to the joint cavity of subchondral cysts. RESULTS: We identified 58 subchondral cystsin 43(71.7%) of 63 cases. All were located in the posterolateral portion of the humeral head, and on the physealline. Twenty-eight patients(65.1%) had one cyst, and 15(34.9%) had two. Thirty-four cysts(58.6%) were round orovoid in shape and, 2-8mm in diameter(average, 3.9mm) ; 24(41.4%) were lobulated and 3-10mm in diameter(average5.3mm). Fifty-three cysts(91.4%) were connected to the joint cavity. CONCLUSIONS: In symptomatic patients, the incidence of subchondral cyst of the humeral head was 71.7%. All were located in the posterolateral portion, andon the physeal line. Most subchondral cysts were connected with the joint cavity.
