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The usual criteria for a diagnosis of PM are weakness in muscles of the head, neck, trunk, upper arms or upper legs; raised blood serum concentrations of some muscle enzymes such as creatine kinase; unhealthy muscle changes on electromyography; and biopsy findings of (i) muscle cell degeneration and regeneration and (ii) chronic inflammatory ...
Inclusion body myositis (IBM) (/ m aɪ oʊ ˈ s aɪ t ɪ s /) (sometimes called sporadic inclusion body myositis, sIBM) is the most common inflammatory muscle disease in older adults. [2] The disease is characterized by slowly progressive weakness and wasting of both proximal muscles (located on or close to the torso ) and distal muscles (close ...
Myositis is a rarely-encountered medical condition characterized by inflammation affecting the muscles. [2] The manifestations of this condition may include skin issues, muscle weakness, and the potential involvement of other organs. [3] Additionally, systemic symptoms like weight loss, fatigue, and low-grade fever can manifest in individuals ...
The development of necrotizing myopathy after statin exposure is insufficient to make the diagnosis. Testing must first exclude other causes of myositis and necrotizing myopathy. [7] A muscle biopsy consistent with SAAM will demonstrate muscle cell death with muscle fiber regeneration and typically has few inflammatory cells.
Diagnosis is typically based on some combination of symptoms, blood tests, electromyography, and muscle biopsies. [2] Eighty percent of adults [5] and sixty percent of children with juvenile dermatomyositis have a myositis-specific antibody (MSA). [6] Although no cure for the condition is known, treatments generally improve symptoms. [1]
Proliferative fasciitis and proliferative myositis (PF/PM) are rare benign soft tissue lesions (i.e. a damaged or unspecified abnormal change in a tissue) that increase in size over several weeks and often regress over the ensuing 1–3 months. [1] The lesions in PF/PM are typically obvious tumors or swellings.
Polymyositis and the associated inflammatory myopathies have an associated increased risk of cancer. [3] The features they found associated with an increased risk of cancer were older age, age greater than 45, male sex, difficulty swallowing, death of skin cells, cutaneous vasculitis, rapid onset of myositis (<4 weeks), elevated creatine kinase, higher erythrocyte sedimentation rate and higher ...
Pulmonary symptoms may present early on, alongside other symptoms or they may manifest later in the progression of antisynthetase syndrome. [15] A recent study showed that pleural involvement is often associated with antisynthetase syndrome, reporting that 42.2% patients with antisynthetase syndrome had pleural effusions. [16]