Self-resolving focal non-ossifying myositis: a poorly known clinical and imaging entity diagnosed with MRI.

Details

Serval ID
serval:BIB_5530F5727128
Type
Article: article from journal or magazin.
Collection
Publications
Title
Self-resolving focal non-ossifying myositis: a poorly known clinical and imaging entity diagnosed with MRI.
Journal
Acta Radiologica Open
Author(s)
Perlepe V., Dallaudière B., Omoumi P., Hristova L., Rezzazadeh A., Vande Berg B., Malghem J., Lecouvet F.
ISSN
2058-4601 (Electronic)
ISSN-L
2058-4601 (Electronic)
Publication state
Published
Issued date
12/2015
Peer-reviewed
Oui
Volume
4
Number
12
Pages
2058460115606156
Language
english
Abstract
BACKGROUND: Focal myositis is a rare benign inflammatory pseudotumor, presenting as a painful nodular mass within a muscle, and characterized by spontaneous resolution within weeks.
PURPOSE: To assess the clinical and imaging findings of focal nodular myositis simulating a neoplasm at clinical examination, with no history of trauma.
MATERIAL AND METHODS: This study describes the locations and appearance at ultrasonography (US), computed tomography (CT), and magnetic resonance imaging (MRI) of this condition in a series of five patients.
RESULTS: MRI and US displayed a solid intramuscular "tumor" and suggested a continuum between the proximal and distal muscle fibers that appeared thickened within the nodular lesion, a sign that has been reported in myositis ossificans. MRI showed edema in adjacent muscles and soft tissues, as well as intense enhancement of the mass. Intense vascular flows were seen at Doppler analysis. CT did not reveal the appearance of peripheral ossifications, ruling out the diagnosis of myositis ossificans. In some patients, the diagnosis of sarcoma had been suggested as possible by the radiologist. Imaging follow-up with MRI showed complete resolution of the masses over several weeks, thus avoiding a biopsy; no recurrence was observed at long-term follow-up (more than 24 months).
CONCLUSION: This paper highlights MRI and US findings in focal non-ossifying myositis, and emphasizes the role of MRI in suggesting this diagnosis, leading to the careful follow-up of the lesion until its resolution, and ruling out more aggressive lesions.
Pubmed
Open Access
Yes
Create date
18/01/2016 15:09
Last modification date
20/08/2019 14:09
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