Introduction: Cases have been referred to our tertiary referral sarcoma service where marrow abnormalities have been identified in the proximal radius. We believe this to be a normal variant, likely representing residual red marrow. The purpose of this study is to describe the features and determine the prevalence of such a finding on elbow magnetic resonance imaging (MRI) in an unselected group of patients imaged at our institution.
Materials and methods: Retrospective review of the last 100 elbow MRI studies performed at our institution. Patient age, sex, side imaged and reason for MRI were recorded. The proximal radial pseudotumour, was defined as a region of marrow signal abnormality with intermediate T1W SE/ T2W FSE/PDW FSE signal intensity between medullary fat and skeletal muscle with hyperintense STIR/PDW FS signal compared to medullary fat, but hypointense to joint fluid. For positive cases, the length and distance from the proximal radial articular surface was measured. Also, local changes, including cortical abnormality, active periostitis, surrounding soft tissue abnormality and similar change in distal humerus and proximal ulna were assessed.
Results: The pseudotumour was identified in 7.8% of cases. No statistical differences were observed for age (p=0.1), laterality (p=0.08) or sex (p=0.79) for pseudotumour presence. Mean length of pseudotumour was 21 mm with mean distance from the articular surface of 16 mm.
Conclusions: The proximal radial pseudotumour is seen in 7.8% of elbow MRI studies and should be recognised as a normal variant of proximal radial marrow signal intensity.
Keywords:
Published on: May 15, 2020 Pages: 1-5
Full Text PDF
Full Text HTML
DOI: 10.17352/abmr.000005
CrossMark
Publons
Harvard Library HOLLIS
Search IT
Semantic Scholar
Get Citation
Base Search
Scilit
OAI-PMH
ResearchGate
Academic Microsoft
GrowKudos
Universite de Paris
UW Libraries
SJSU King Library
SJSU King Library
NUS Library
McGill
DET KGL BIBLiOTEK
JCU Discovery
Universidad De Lima
WorldCat
VU on WorldCat
PTZ: We're glad you're here. Please click "create a new query" if you are a new visitor to our website and need further information from us.
If you are already a member of our network and need to keep track of any developments regarding a question you have already submitted, click "take me to my Query."