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

We studied four cases of proliferative myositis by the avidin-biotin-peroxidase complex technique, using a panel of 12 antibodies, and by electron microscopy. The aim was to clarify the nature of their constituent cells, specifically the giant ganglion-like cells and spindle cells, and to discuss the implications for histogenesis. In all cases, both cell types showed positive cytoplasmic staining with antibodies to vimentin, actin (C4), and alpha-smooth muscle actin-1, but in only one was there positive staining with desmin. No staining was obtained with factor XIIIa, muramidase, alpha-1-antitrypsin, myoglobin, S-100 protein, CAM 5.2, factor VIII-related antigen, or neuron-specific enolase. By electron microscopy, both types of cells were seen to contain numerous thin filaments, dense bodies, coated and pinocytotic vesicles, active and dilated rough endoplasmic reticulum, few microvilli, and incomplete desmosomal junctions. Our findings imply a myofibroblastic nature for the giant ganglion-like cells and spindle cells. Our observations also support the hypothesis that they are derived from a pericytic cell.
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PMID:Proliferative myositis. An immunohistochemical and ultrastructural study. 205 61

We report about two female patients with a histopathological proven granulomatous myositis associated with a fasciitis. One patient showed noncaseating granulomas in the muscle fascia. She suffered from symmetrical contractures of the digital flexors and ankles. The second patient showed uveitis and polyneuropathy, too. In addition, increased activities of the angiotensin-converting-enzyme and lysozyme in the sera suggested that both cases represent a new form of sarcoidosis.
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PMID:[Fasciitis in granulomatous myositis--an atypical manifestation of sarcoidosis?]. 233 6

Necrotizing soft tissue infections (NSTIs) are aggressive severe soft tissue infection that cause rapid and widespread infection and necrosis of the skin and soft tissues and are highly lethal. NSTIs include necrotizing cellulitis, adipositis, fasciitis and myositis/myonecrosis and have significant potential for extensive soft tissue and limb loss. Early diagnosis and treatment of NSTIs remains the cornerstone of therapy. Timely aggressive surgical debridement and early appropriate antibiotic treatment are required for a successful outcome and clinical cure. Mortality rate has decreased from 25-50% in past years, to 10-16% in recent years with aggressive surgical and medical management. Additional innovative strategies for the treatment of NSTIs, including intravenous immuno-globulin G (IVIG), hyperbaric oxygen, and vacuum-assisted closure, do not yet have definitive evidence of efficacy, but may be considered in patients at high risk of death. A comprehensive knowledge of the pathophysiology, diagnostic features, causative microbial pathogens, and treatment strategies (including surgical debridement and antimicrobial therapy) is required for successful management of NSTIs.
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PMID:Necrotizing soft tissue infections. 2066 22

A 65-year-old man was diagnosed with systemic sclerosis on the basis of skin thickening and positivity of anti-Scl-70 antibodies. Because myogenic enzymes, such as creatinine phosphokinase and aldorase, were also elevated, myopathy or myositis associated with systemic sclerosis was considered. Muscle magnetic resonance imaging and gallium scintigraphy did not show abnormalities. Findings of muscle biopsy demonstrated presence of noncaseating granulomas with multinucleated giant cells. In addition, serum angiotensin-converting enzyme and lysozyme were elevated, and therefore a diagnosis of sarcoid myopathy was made. Further, renal sarcoidosis was revealed with renal biopsy. Prednisolone (40 mg/day) improved both the myopathy and nephritis. Sarcoid myopathy is a rare condition, but it should be considered when myogenic enzymes are elevated in the patient with systemic sclerosis. Further, muscle biopsy may be essential to make an accurate diagnosis in such condition.
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PMID:A case of sarcoidosis developing as sarcoid myopathy concomitant with systemic sclerosis and review of the literature. 2167 19