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

Benign fibrous lesions of the digits can present a considerable diagnostic challenge. Some lesions may resemble sarcomas, resulting in needless amputation. One such benign entity resembles myositis ossificans histologically but presents as an aggressive hand lesions. Unfortunately, this lesion has been given multiple names. It is most appropriately termed florid reactive periostitis. This paper reports a case of florid reactive periostitis in a 12-year-old girl.
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PMID:Pediatric update #15. Florid reactive periostitis of the digits. 223 59

We report heterotopic chondro-ossification occurring in the hand of a young man in the absence of trauma. The differential diagnosis includes: bizarre periosteal osteochondromatous proliferations of the hands and feet, mature lesions of myositis ossificans, osteogenic sarcoma, confluent lesions of extra-articular synovial chondromatosis, and nodular forms of florid periostitis. True heterotopic bone formation is a benign condition, which of itself requires no specific treatment.
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PMID:Heterotopic chondro-ossification: a case report. 295 78

Noninfectious, nonneoplastic reactive processes of the hand, such as myositis ossificans circumscripta, pseudomalignant osseous tumor of soft tissue, and florid reactive periostitis, appear similar radiologically and histologically and are often difficult to differentiate. Magnetic resonance (MR) findings in two such lesions are reported. The extensive reactive change in the extraosseous soft tissue and the bone marrow and the relatively small extent of ossification may be characteristic. Although low-grade infection and small osseous neoplasms with reactive changes, such as osteoid osteoma, may still remain possible causes, MR imaging provides essential evidence for including noninfective, nonneoplastic reactive processes of uncertain cause in the list of differential diagnoses.
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PMID:Magnetic resonance imaging of pseudomalignant osseous tumor of the hand. 782 77

This paper represents a philosophical shift in thinking. The authors propose that heel spur syndrome is not a primary soft tissue injury (i.e., enthesiopathy with concomitant bruising of the bursae and fat pad, and eventually the formation of a traction spur by the pull of the plantar fascia), but rather a primary bone injury. A microtrabecular stress failure (fatigue perturbation) of the os calcis occurs with secondary soft tissue involvement such as enthesiopathy, periostitis, myositis, bursitis, and finally the formation of a buttress callous (bone spur) to stabilize a microcortical crack. This study describes four stages in a progressive, sequential, pattern of fatigue failure of the os calcis. Clinical symptoms for each stage, along with supporting data such as x-rays, bone scans, and MRIs will be presented, as well as a suggested treatment plan for the chronic resistant cases.
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PMID:Fatigue perturbation of the os calcis. 795 Nov 94

A 37-year-old woman with myositis ossificans of the left foot is reported. A faint density was seen on foot radiographs, whereas computed tomography images showed a rim of mineralization inferior to the second and third metatarsal bones. On short tau inversion recovery-weighted magnetic resonance images, a hyperintense lesion was demonstrated with hyperintensity extending to the surrounding soft tissues. The rim of ossification appeared hypointense. Other non-neoplastic soft tissue processes with bone formation such as pseudomalignant osseous tumor of soft tissues, florid reactive periostitis, and bizarre parosteal osteochondromatous proliferation occur more commonly in the foot than myositis ossificans. A differential diagnosis of these lesions including periosteal and parosteal osteosarcoma, periosteal chondroma, and osteomyelitis is discussed.
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PMID:Myositis ossificans of the foot. 929 45

Exertional compartment syndrome is characterized by intracompartmental pressures that rise transiently following repetitive motion or exercise, thereby producing temporary, reversible ischemia, pain, weakness, and, occasionally, neurologic deficits. The exact cause or pathogenesis remains unclear; a disturbance of microvascular flow caused by elevated intramuscular pressure leads to tissue ischemia, depletion of high-energy phosphate stores, and cellular acidosis. Anatomic contributing factors may include a limited compartment size, increased intracompartmental volume, constricted fascia, loss of compartment elasticity, poor venous return, or increased muscle bulk. The diagnosis is suspected based on history and confirmed with physical examination and intramuscular pressure evaluation before and after exercise (stress test). Differential diagnosis includes claudication or other vascular abnormalities, myositis, tendinitis, periostitis, chronic strains or sprains, stress fracture, other compression or systemic neuropathies, and cardiac abnormalities with angina or referred extremity pain. Initial treatment includes activity modification; refractory symptoms can be managed with elective fasciotomy.
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PMID:Exertional compartment syndrome of the upper extremity. 974 26

Periosteal osteoblastoma is an extremely rare bone-forming neoplasm located on the surface of cortical bone. Of the fewer than 30 cases of periosteal osteoblastomas found in the literature, 2 have been reported to be located in cranial bone, and these have not been documented in detail with clinical history, radiographic findings, macroscopic features, and microscopic findings. Although the differential diagnoses of periosteal lesions include parosteal and periosteal osteosarcoma, periosteal chondroma and chondrosarcoma, osteochondroma, osteoid osteoma, periostitis ossificans, and myositis ossificans, an important differential diagnosis both radiologically and pathologically of such a lesion in the cranium is meningioma. We report an unusual case of periosteal osteoblastoma located in the frontal cranial bone that was radiologically consistent with a meningioma. The differential diagnosis of metaplastic meningioma with differentiation toward bone is discussed.
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PMID:A rare case of periosteal osteoblastoma located in the frontal cranial bone. 1591 30

Florid reactive periostitis is the term used to describe a benign disease characterized by aggressive periosteal reaction and benign soft-tissue inflammation. Although it is considered rare, there are numerous reports in the literature that refer to this disease with different names such as parosteal fasciitis, fasciitis ossificans, benign fibro-osseous pseudotumor, pseudomalignant osseous tumor of soft tissue, and bizarre parosteal osteochondromatous proliferation. As a result, the nomenclature is confusing, and some authors have placed florid reactive periostitis ossificans into the heterogeneous group of pseudomalignant osseous tumors of soft tissue or proliferative periosteal processes, whereas other authors place this entity in the myositis ossificans group. In the same manner, florid reactive periostitis has been considered to be a previous stage of bizarre parosteal osteochondromatous proliferations. This article presents a case of florid reactive periostitis ossificans of the distal ulna in a 13-year-old boy. The patient presented with a painful lesion in the distal ulna, and plain radiographs suggested the presence of a quickly growing periosteal lesion with associated calcification and soft tissue mass. Histologically, the appearance was that of reactive periostitis. The clinical, radiological, and histologic features of florid reactive periostitis are described.
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PMID:Florid reactive periostitis ossificans of the distal ulna. 1929 23

Tumors involving the joint or having symptoms in the joint are rare. Both joint-related tumors and sports-related injuries can affect young, active patients, and their symptoms often overlap. Sports medicine specialists rarely encounter synovial conditions, so expertise in this area is difficult to establish. Orthopaedic oncologists often see only patients with an advanced condition. The clinical presentation of a soft-tissue sarcoma may be similar to that of a common lesion such as a synovial cyst. Some benign or malignant bone tumors cause referred pain to distant joints, possibly leading to a delay in diagnosis or inappropriate initial surgery. For example, a hip or proximal femoral bone tumor commonly causes isolated knee pain. Conversely, because the symptoms of some sports-related conditions or pseudotumors (such as a rectus femoris tear, fascial herniation, myositis ossificans, an avulsion injury, an avulsive cortical irregularity, femoral diaphyseal periostitis, or pseudotumor deltoideus) are similar to symptoms of a sarcoma, overtreatment is possible. A sports medicine physician should be familiar with these conditions to facilitate accurate and expedient diagnosis with appropriate treatment.
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PMID:Diagnosis and treatment of joint-related tumors that mimic sports-related injuries. 1938 90

Radionuclide scans with improved imaging techniques such as single-photon-emission tomography and three-phase scanning have become safe, well-established, and highly effective diagnostic tools in sports medicine. The greatest strengths of the techniques include providing early physiologic information about injury sites and evaluating large areas or the whole body in a single examination. As described and illustrated here, bone scans are particularly useful for diagnosing such musculoskeletal injuries as stress fractures, avulsion fractures, periostitis, myositis ossificans, and rhabdomyolysis.
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PMID:Advantages of diagnostic nuclear medicine part 1: musculoskeletal disorders. 2008 84


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