BACKGROUND: @entity5442 is a rare benign inflammatory @entity6437 , 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 @entity4383 simulating a @entity5 at clinical examination, with no history of @entity130 . 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 @entity1 . RESULTS: MRI and US displayed a solid intramuscular " @entity5 " 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 @entity5323 . MRI showed @entity4 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 @entity5323 . In some @entity1 , the diagnosis of @entity242 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 @entity5442 , 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.

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

@entity1 :: ('9606', 'Species') :: ['patients'] @entity5442 :: ('MESH:D009220', 'Disease') :: ['myositis', 'Focal myositis'] @entity242 :: ('MESH:D012509', 'Disease') :: ['sarcoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'neoplasm'] @entity6437 :: ('MESH:D006104', 'Disease') :: ['pseudotumor'] @entity4 :: ('MESH:D004487', 'Disease') :: ['edema'] @entity5323 :: ('MESH:D009221', 'Disease') :: ['myositis ossificans'] @entity4383 :: ('MESH:D020518', 'Disease') :: ['nodular myositis'] @entity130 :: ('MESH:D014947', 'Disease') :: ['trauma']
@entity5442 :: (MESH:D009220,Disease) :: ['myositis']
