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Query: UMLS:C0027121 (myositis)
 4,538 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We present a case of intraarticular myositis ossificans in the right knee of a child. Myositis ossificans (MO), though relatively rare in childhood and even more uncommon within a joint, should be included in the differential diagnosis of an intra-articular mass when indicated by the typical clinical, radiographic, and histologic findings. An 11-year-old male presented with a history of trauma to his right knee. Four weeks after the initial injury, an MRI demonstrated evidence of an ACL rupture with a "cystic mass" within the intercondylar notch along the anterior surface of the torn ligament. At subsequent arthroscopy, the mass noted on MRI was removed. The histology was consistent with MO. The authors believe this to be the first case of MO in the intercondylar notch detected by MRI, treated by arthroscopy, and confirmed by histology.
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PMID:Myositis ossificans within the intercondylar notch treated arthroscopically. 2053 99

Myositis ossificans is an uncommon disorder, which is commonly mistaken for a malignant muscle disease before histologic examination. Trauma is the most common cause of the acquired form of the disease; however, atraumatic cases have been described. The factors responsible for extraosseous ossification, such as the role of bone morphogenic protein 4, are becoming better understood. However, treatment of the disorder is not well defined. We present a case of atraumatic myositis ossificans in a 16-year-old girl that was associated with severe pain and lacked radiologic evidence of calcification. She underwent early surgical excision, resulting in immediate resolution of her symptoms. This case demonstrates that waiting for complete maturation of the lesion may not be necessary.
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PMID:Biopsy diagnosis of early myositis ossificans without radiologic evidence of calcification: success of early surgical resection. 2108 15

Myositis ossificans traumatica is a relatively common injury associated with sports especially those involving contact. It continues to frustrate both athlete and health practitioner alike due to its continued lack of treatment options and a lengthy natural history. This case study chronicles the observation of a 34 year old recreational ice hockey player who presented 7 years post-trauma, was diagnosed with myositis ossificans traumatica and was followed up on 8 years later (15 years post-trauma). This case report is suspected to be the first published case study of its kind. The literature review outlines the various types of myositis ossificans, its incidence, pathogenesis, differential diagnoses including osteosarcoma, and the various methods/modalities reported in its treatment.
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PMID:Myositis ossificans traumatica of the deltoid ligament in a 34 year old recreational ice hockey player with a 15 year post-trauma follow-up: a case report and review of the literature. 2112 14

Myositis ossificans is a rare condition characterized by non-neoplastic heterotopic bone formation in soft tissue and skeletal muscle. It is a benign and often self-limiting disease with no need for surgery. Here, we describe a young female swimmer with myositis ossificans circumscripta of the triceps due to overuse. Because of the benign character of the lesion, conservative treatment was initiated with rest and anti-inflammatory drugs. She obtained complete resolution after 6 months and was able to return to normal sporting activities. Myositis ossificans circumscripta is a rare benign lesion with an excellent prognosis. Most lesions in athletes occur due to contusions or strains; however, overuse is now described as well. Spontaneous resolution is seen in almost all cases. Cases in which, despite conservative treatment, a painful mass persists, surgical excision can be considered.
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PMID:Myositis ossificans circumscripta of the triceps due to overuse in a female swimmer. 2251 76

Myositis ossificans is ossification and bone formation within muscle. It is a rare and unusual pathologic entity that has defied most efforts to establish definite etiology, pathogenesis, and satisfactory treatment. Myositis ossificans is mainly of 2 types: myositis ossificans progressiva (MOP) and myositis ossificans traumatica (MOT). Myositis ossificans idiopathic is also reported in the literature. When it affects the muscles of mastication, it causes severe trismus. Computed tomography scans and magnetic resonance imaging can effectively delineate the calcified mass. In this article, we present a case of MOT of the medial, lateral pterygoid, and contralateral temporalis muscles.
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PMID:Myositis ossificans in medial, lateral pterygoid, and contralateral temporalis muscles: a rare case report. 2281 52

Myositis ossificans is a type of bone-forming lesion that arises in soft tissue and mimics malignancy. We present a case of myositis ossificans in a 16-year-old girl with anxiety disorder, Asperger syndrome, and no known history of trauma. A variety of diagnostic tools including magnetic resonance, ultrasound, and biopsy are used to make the diagnosis. The histologic and radiographic findings used to distinguish this disorder from malignant conditions are discussed.
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PMID:Myositis ossificans requires multiple diagnostic modalities. 2297 21

Myositis ossificans is a rare cause of pain following knee arthroplasty. We describe a 72-year-old woman who developed symptomatic early onset myositis ossificans at the femoral marker pin site following navigated knee arthroplasty.
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PMID:Symptomatic myositis ossificans following computer navigated total knee replacement: a complication of fixed femoral marker placement. 2302 29

Myositis ossificans is defined as formation of bone at the site of injured muscle. It is one of the rare complications of supracondylar fracture of humerus in children. Myositis mass usually develops on the anterior aspect in the brachialis muscle and produces restriction of range of motion, but complete ankylosis is rare. To the best of our knowledge, this is the first case to be reported in the literature as a consequence of myositis ossificans traumatica. In this case, a six-year-old child presented to the casualty department with pain in the right elbow after a fall on outstretched hand during play. After surgical excision through the anterior approach, the child had no symptoms referable to the elbow and a residual flexion deformity of 15 degrees with further painless flexion up to 100 degrees at last follow-up of one year after surgery.
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PMID:Extraarticular bony ankylosis in a child with supracondylar fracture of humerus. 2306 3

Myositis ossificans, also known as traumatic myositis ossificans or myositis ossificans circumscripta, is the product of an unusual reactive process of mesenchymal stem cells within the muscle produced secondary to a traumatic insult or inflammatory process. In approximately 75% of cases, the process has a direct correlation with a single or repetitive, traumatic, penetrating, or crushing injury to the muscle. However, in up to 25% of cases, there is no recollection of a traumatic event. The most commonly accepted mechanism of traumatic etiology includes the embedment and lysis of bone fragments within the soft tissue causing subsequent exposure of bone morphogenic proteins to extraosseous cells. This environment stimulates osteoblasts to form true bone, dystrophic calcifications, or a calcified chondroid matrix. A concomitant mechanism that occurs involves the overproduction of bone morphogenic protein-4 produced by the muscle cells or the muscle fascia.
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PMID:Myositis ossificans of the temporalis muscle: case report and review of the literature. 2387 68

Myositis ossificans is a disease that is characterized by nonneoplastic, heterotopic bone formation within a muscle. Myositis ossificans traumatica, also called myositis ossificans circumscripta, is a disease in which muscles are ossified presumably following acute trauma, burns, surgical manipulation, or repeated injury. It is often remitted after surgical excision though some patients have repeated recurrences. Myositis ossificans traumatica of masticatory muscles is not frequently reported in the literature, with the most common clinical finding being a progressive limitation of motion in the mandible. The aim of this article is to present and discuss a case of myositis ossificans traumatica of the left medial pterygoid muscle and to review the literature of myositis ossificans of the masticatory muscles.
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PMID:Myositis ossificans of the left medial pterygoid muscle: case report and review of the literature of myositis ossificans of masticatory muscles. 2462 56


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