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

Nodular fasciitis (NF) shows a cellular proliferation which leads to widening of the fascia. Frequently unilateral or more often bilateral disruption of the fascia, with an infiltrative pattern is present. Subcutaneous fascia and surrounding fat are involved. Superficially the cellular proliferation may extend into dermal connective tissue. Deeper muscular tissue may be involved, with transitional forms or purely intramuscular changes, compatible with proliferative myositis. Proliferative myositis is considered to be a deep-seated variant of NF with muscular involvement. Intramuscular myxoma may be thought of as an intramuscular and mucoid variant of NF. A bilateral infiltrative pattern was most frequently found at all levels; in cases with muscular involvement it was always present.
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PMID:Extent and level of fascial involvement in 100 cases with nodular fasciitis. 15 36

Proliferative myositis presented in a 7-month-old female infant as a poorly circumscribed mass growing rapidly within the interscapular skeletal muscle. Muscle fascicles and individual fibers were dissected by an inflammatory infiltrate of lymphocytes, plasma cells, and histiocytes immersed in a basophilic intercellular substance. Numerous ganglionlike giant cells were present and had ultrastructural features suggestive of histiocytic origin. The possible relation to other rapidly growing lesions that appear in soft tissues is discussed. This probably represents the first reported case of proliferative myositis in a pediatric patient.
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PMID:Proliferative myositis in an infant: report of a case with electron microscopic observations. 322 6

Benign fibrous lesions in the head and neck include lesions with a wide range of histologic features. Some of these conditions may be mistaken for malignant tumors, leading to unnecessary radical therapy. Proliferative myositis is one such lesion. A 49-year-old man had a one-week history of swelling over the left side of this mandible and upper neck. Most of the mass was removed and the diagnosis of proliferative myositis was confirmed by excisional biopsy. The patient was free of disease one year after surgery.
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PMID:Proliferative myositis in the head and neck. 666 Mar 79

Proliferative myositis, a reactive lesion similar to proliferative fasciitis and nodular fasciitis, has only been cytogenetically described in one other report to date. This previously described case showed trisomy 2. Cytogenetic analysis and fluorescence in situ hybridization (FISH) of a proliferative myositis lesion in the present study did not reveal trisomy 2 but the following clonal translocation was observed: 46,XX,t(6;14)(q23;q32).
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PMID:Chromosomal anomalies in a case of proliferative myositis. 933 81

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

Proliferative myositis is a rare pseudosarcomatous inflammatory process. Radiological diagnosis of self-limiting proliferative myositis helps direct appropriate clinical management and avoiding unnecessary surgical excision. We present the ultrasonography, computed tomography, and magnetic resonance imaging findings in a case of proliferative myositis. In this case, malignancy was suspected, and complete excision was performed. A checkerboard-like pattern, a characteristic sonographic and pathological finding of proliferative myositis, was demonstrated by computed tomography in our patient; to the best of our knowledge, this is the first such case in the literature.
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PMID:Proliferative myositis presenting with a checkerboard-like pattern on CT. 1951 85

Proliferative myositis (PM) and myositis ossificans (MO) are two uncommon, benign pseudosarcomatous lesions of soft tissue. Despite their benign nature, they are often misdiagnosed for malignant soft tissue tumors because of their alarming clinical presentation. Fine needle aspiration cytology (FNAC) is a quick and simple method that can accurately diagnose such lesions, provided that the cytopathologist is adequately familiar with the cytomorphological features of these lesions as opposed to the features of sarcomas. In this report, we present three cases of PM and one case of MO diagnosed by FNAC. Their cytomorphological features are described, and related literature is reviewed.
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PMID:Cytologic findings and potential pitfalls in proliferative myositis and myositis ossificans diagnosed by fine needle aspiration cytology: report of four cases and review of the literature. 2089 Sep 98

Proliferative myositis, a pseudosarcomatous lesion of skeletal muscle, is quite rare in the pediatric population. While benign, it is not always recognized as such, and may be treated with an extensive resection that can result in permanent disfigurement. We report a case of an infant with the diagnosis of proliferative myositis, who to our knowledge is the youngest patient to be evaluated with magnetic resonance imaging (MRI). Although the MRI findings are non-specific, we highlight the importance of considering proliferative myositis in the differential diagnosis of a soft tissue mass, which ultimately might prevent an overly aggressive resection in a child.
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PMID:Proliferative myositis: expanding the differential diagnosis of a soft tissue mass in infancy. 2191 82

Proliferative myositis (PM) along with proliferative fasciitis and nodular fasciitis are a group of pseudosarcomatous myofibroblastic proliferations. Although the histologic presentation of each is almost identical, the magnetic resonance imaging (MRI) appearance of proliferative myositis is closer to that of inflammatory myopathies. We report a case of PM in which the imaging and histologic features combine typical findings of PM with unusual imaging features, suggesting of reactive (or nodular) fasciitis.
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PMID:Atypical proliferative myositis: original MR description with pathologic correlation: case report. 2460 11

We report a case of a 51-year-old woman who presented with a rapidly enlarging, painful, midline neck mass that developed over a three day period. A CT scan of the neck showed a solid circumscribed mass in the sternohyoid muscle. The initial differential diagnosis included inflammation of thyroglossal duct remnant, an abnormal lymph node, and thyroid carcinoma. The patient underwent operative excision with final pathology revealing proliferative myositis. Proliferative myositis is an uncommon benign proliferation of skeletal muscle and has only been reported a limited number of times in the head and neck region.
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PMID:Benign proliferative myositis of the sternohyoid muscle: review and case report. 2523 69


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