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Results for “MYOSITIS OSSIFICANS”

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At least 253 records · Page 14Linked to original sources
PubMed1980

[Myositis ossificans progressiva (M.o.p.)--a morphological and biochemical study (author's transl)].

In a two-year-old girl suffering from myositis ossificans progressiva a biopsy specimen from a soft tissue tumor was examined by electron microscopy and by collagen electrophoresis (SDS-Polyacrylamide Gel Electrophoresis). Electron microscopic findings of the biopsy specimen showed that the collagen appeared to be similar to type II collagen which can be found for example in hyaline cartilage however collagen electrophoresis revealed neither any certain signs of type II collagen nor any different proportion of type I and type III collagen compared to a healthy child.

Biopsy↗
PubMedDate not supplied

[Non-traumatic myositis ossificans. Ultrasonic and x-ray computed tomographic aspects. Apropos of a case].

Radiology in a patient with non-traumatic myositis ossificans produced standard images suggestive of juxta-cortical osteosarcoma, the peripheral form of a chondrosarcoma or a synovial sarcoma. Ultrasound failed to provide a conclusive diagnosis, and a scan was the only means of suggesting the benign nature of the lesion by demonstrating integrity of bony cortex and characteristic disposition of calcifications.

Adolescent↗
PubMed1997

[Myositis ossificans of the pterygoid and temporal muscles with metachronous contralateral involvement].

After reviewing the literature, the authors report a case of myositis ossificans of the right pterygoid and temporalis muscles in a patient undergoing surgery to remove the left medial pterygoid muscle owing to the same pathology. The metachronous localisation in contralateral masticatory muscles compared to the primary site leads the authors to emphasize the post-traumatic and iatrogenic etiology of this rare pathology. In the light of their experience, they underline the importance of a precise diagnosis and surgical exeresis, followed by cautious rehabilitation with the least trauma, if necessary backed by appropriate medical treatment.

Adult↗
PubMed2003

Myositis ossificans as a complication of a muscle tendon junction strain of long head of biceps. A case report.

An unusual case of myositis ossificans secondary to a muscle tendon junction (MTJ) strain of long head of biceps in a young athlete is reported. Plain radiographs, ultrasonography and MRI in association with clinical assessment showed the appearance and the evolution of this pathological entity. This case had a resolution of pain and function after 3 months of conservative treatment. At 6 months follow-up, the athlete became asymptomatic and he gradually returned back to his sports activity.

Adolescent↗
PubMed2000

The difficulties of diagnosing myositis ossificans circumscripta in the paraspinal muscles of a human immunodeficiency virus-positive man: magnetic resonance imaging and temporal computed tomographic findings.

Myositis ossificans circumscripta (MOC) is an uncommon disease that has been reported to develop after trauma, burns, and infections, as well as in cases in which the pathogenesis is unknown. Although most cases of MOC develop below the clavicles, it has been reported in the head and neck area, where it primarily involves the muscles of mastication. To our knowledge, there have been only 4 previous reports of MOC affecting the paraspinal muscles. We report the fifth such case, which developed in a human immunodeficiency virus-positive patient, and describe the longitudinal imaging changes of MOC.

Adult↗
PubMed1978

[Non-traumatic myositis ossificans circumscripta (author's transl)].

The clinical, pathological and radiological features and the differential diagnosis of the very rare condition of non-traumatic myositis ossificans circumscripta are illustrated by one patient. The characteristic radiological appearances make a correct diagnosis of this localised, non-malignant process possible.

Adolescent↗
PubMedDate not supplied

MR imaging of myositis ossificans: variable patterns at different stages.

Five patients with a palpable mass at presentation underwent magnetic resonance (MR) imaging. The final diagnosis was myositis ossificans (MO). MR imaging features, particularly after injection of gadopentetate dimeglumine, mimicked those of an inflammatory mass or neoplasm. The lesions were excised in three patients, and the images were correlated with histologic findings. Three different appearances were noted on MR images, corresponding to the stages of maturation of MO. Two cases involved early-stage lesions, and T1-weighted MR images showed a mass with homogeneous intermediate signal intensity. Both lesions showed rim enhancement after contrast agent injection and high signal intensity on T2-weighted images. Pathologic specimens demonstrated stroma with masses of spindle cells in which osteoid production was interspersed. The enhanced rim of the lesion mimicked the expected MR appearance of an abscess or necrotic tumor. Areas of enhancement in adjacent muscle were also seen on postcontrast T1-weighted images. Intermediate-stage MO was present in one case; there was evidence of a thin rim of calcification on plain radiographs and fatty changes in the lesion on T1-weighted images, corresponding with histologic findings. One case of a mature lesion showed a considerable degree of peripheral calcification both on MR images and at histology. MR imaging is nonspecific in the diagnosis of early-stage MO.

Abscess↗
PubMedDate not supplied

Myositis ossificans traumatica in a young child: a case report.

This is a case report of a 2-year, 11-month-old boy with traumatic myositis ossificans of the deltoid muscle, possibly the youngest child with this condition reported in the literature. The lesion, removed 7 months after injury because of pain, showed no evidence of spontaneous regression.

Child, Preschool↗
PubMed1979

Ultrastructural evidence of myofibroblasts in pseudomalignant myositis ossificans.

Seven cases of pseudomalignant ossifying myositis with a typical clinical symptomatology have been reported. None of the cases had experienced an injury. All the lesions were intramuscular and all of them showed a zonal arrangement. Electron microscopy in three cases allowed the demonstration of cells showing morphological features of myofibroblasts and monocytic cells of the macrophage type. These previously unreported features together with the zonal pattern of the lesions indicate their reparative nature.

Adolescent↗
PubMed1993

[Pseudo-tumoral circumscribed myositis ossificans of the thoracic wall. Contribution of ultrasonography, x-ray computed tomography and MRI].

The authors report the main clinical and radiographic aspects of a circumscribed myositis ossificans in a 5 year old child located in the thoracic wall, near the sternum, stimulating a malignant tumor. CT scan was more contributive than MRI, both for diagnosis and survey, because it shows better the progressive peripheral calcification typical of the lesion.

Calcinosis↗