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

Proliferative myositis is a rare, inflammatory tumor that is often misdiagnosed as sarcoma. The clinical course of proliferative myositis is benign, and local recurrence after simple excision is uncommon. Typically, the lesion presents in the extremities or the head and neck. We present an unusual case of proliferative myositis with involvement of the anterior chest wall.
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PMID:Proliferative myositis: a rare pseudosarcoma of the chest wall. 1199 76

Myositis ossificans circumscripta is a benign pathology of soft tissue occurring in young patients often after localized trauma. Histological and radiological appearances may mimic a malignant neoplasm, mainly sarcoma. We report a case characteristic of myositis ossificans circumscripta, to illustrate diagnostic arguments which are based on their appearance on conventional radiographs, computed tomography and magnetic resonance imaging and on their changes with time.
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PMID:[Radiological spectrum of myositis ossificans circumscripta evolution]. 1263 89

Focal myositis is a localised inflammatory process affecting skeletal muscles belonging to the pathological group of inflammatory pseudo tumours of soft tissue that includes myositis ossificans, proliferative myositis and nodular pseudosarcomatous fasciitis. Very rarely, it may affect one of the neck muscles and present as a neck lump, in which case both the clinical and pathological picture can mimic a sarcoma. We describe a case of focal myositis of the sternocleidomastoid muscle, present a review of this rare condition and debate the necessity of biopsy.
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PMID:Inflammatory focal myositis of the sternomastoid muscle: is there an absolute indication for biopsy? A case report and review of the literature. 1636 67

Idiopathic focal eosinophilic myositis is a rare benign pseudotumor of skeletal muscle of unknown cause, characterized by focal eosinophilic infiltration of striated muscle. It can mimic a soft tissue sarcoma clinically and on gross examination of the specimen. Microscopic examination establishes the diagnosis. It is important to recognize this pseudosarcomatous lesion so as to spare the patient from anxiety.
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PMID:Focal eosinophilic myositis--a rare cause of pseudotumor. 1700 93

We describe a case of calcifying haematoma in a 78-year-old war veteran with a mass in his right lower leg. The likely differential diagnosis of myositis ossificans and soft tissue sarcoma was worked up. We discuss some of the difficulties of diagnosis despite having computed tomography and magnetic resonance imaging examinations and the unexpected final diagnosis of calcifying haematoma that was made on incisional biopsy.
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PMID:Calcifying haematoma mimicking a soft tissue sarcoma and myositis ossificans. 1705 56

Myositis ossificans is a reactive, ossifying process within soft tissues, which by its clinical and histological features is considered a pseudosarcomatous lesion. There are few reports that describe the cytologic findings in myositis ossificans, and each of these mentions different cellular composition. We describe the cytology of a case of myositis ossificans in a 14-year-old boy with clinical diagnosis of soft tissue sarcoma, and analyze the most common cytologic findings reported previously of this entity. We conclude that the different cellular composition reported, reflects the different histologic components of this lesion according to the area (zonation phenomenon), and that clinico-radiologic correlation is essential for the cytological diagnosis.
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PMID:Scrape cytology of myositis ossificans: report of a case and analysis of the cytologic findings described previously. 1806 93

One of the most common and important pitfalls in soft tissue pathology are the so-called pseudosarcomas. These lesions are nonneoplastic; however, their rapid growth, hypercellularity, cytologic atypia, and mitotic activity makes them prone to be misinterpreted as sarcoma. The most common of these lesions are fibroblastic/myofibroblastic and matrix-forming proliferations, including nodular fasciitis, proliferative fasciitis and myositis, ischemic fasciitis, massive localized edema, myositis ossificans, and bizarre parosteal osteochondromatous proliferation and related entities. Most of these lesions rarely recur following simple excision; therefore, their accurate recognition helps prevent excessive therapy.
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PMID:Pseudosarcomas of soft tissue. 1838 9

As a tertiary centre for soft-tissue sarcomas, numerous non-neoplastic masses are referred to our institution. In many cases, review of the imaging allows a confident diagnosis to be made without the need for biopsy. Lesions include anomalous muscles and variants, muscle injury, haematoma, myositis ossificans, aneurysm, abscess, tumoral calcinosis, amyloidosis and elastofibroma. The purpose of this article is to review the imaging characteristics of these non-neoplastic lesions and highlight the features that help differentiate these lesions from a soft-tissue sarcoma.
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PMID:Pictorial review: Non-neoplastic soft-tissue masses. 1906 99

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

Tuberculous myositis is extremely rare, even in immunocompromised hosts. We present a case of disseminated tuberculous myositis in a girl with secondary acute myelogenous Leukemia following successful chemotherapy for undifferentiated sarcoma of the maxillary sinus. The diagnosis was established by direct visualization of acid-fast bacilli in the biopsied nodule and by typical pathologic findings. Three weeks after initiation of antituberculosis treatment, the patient experienced both clinical and radiologic improvement.
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PMID:Disseminated tuberculous myositis in a child with acute myelogenous leukemia. 1945 83


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