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  • Becker muscular dystrophy  (1)
  • Endothelial cell  (1)
  • Paraneoplastic phenomenon  (1)
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  • 1
    ISSN: 1432-0533
    Keywords: Key words Thrombomodulin ; Paraneoplastic phenomenon ; Endothelial cell ; Myalgia ; Thrombophlebitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We found a microvascular endothelial abnormality in a biopsy specimen from the gastrocnemius muscle of a patient with gastric cancer, who had severe myalgia and angialgia in the calf region with the symptoms of thrombophlebitis. There were no definite findings of inflammatory myopathy in histochemical and immunohistochemical studies. Electron microscopic examination revealed the accumulation of abnormal mitochondria in the subsarcolemmal area, and a fair number of degenerating capillaries. Immunohistochemical analysis of procoagulant or anticoagulant factors revealed marked reduction of thrombomodulin (TM) expression on small vessels and capillaries. Although a reduction of TM on small vessels has been observed around perifascicular atrophic fibers in patients with dermatomyositis, histochemical findings of the present patient showed no perifascicular atrophy or severely degenerating fibers. These pathological findings in the patient may be related to a malignant neoplasm and may be one of the causes of disseminated intravascular coagulation (DIC), which is the main complication of malignant neoplasms. Further studies are necessary to determine whether the reduction of TM on the small vessels and capillaries in skeletal muscle is a predictor of some severe condition such as DIC or a rare pathological finding in some special condition such as scirrhous carcinoma with thrombophlebitis.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Key words Utrophin ; Becker muscular dystrophy ; Thrombosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We previously reported a patient with Becker muscular dystrophy (BMD) who exhibited a benign clinical phenotype and marked expression of utrophin on the muscle cell membrane. The patient developed multiple episodes of thrombosis (middle cerebral and femoral arteries) in the course of the disease. We re-examined the biopsy muscle specimen from the patient immunohistochemically as to the expression of procoagulant or anticoagulant factors. We found a lower expression of thrombomodulin on the muscle cell membrane in the BMD patient compared with other BMD or Duchenne muscular dystrophy (DMD) patients. Although utrophin up-regulation in muscle is thought to prevent the muscle wasting in dystrophin-deficient DMD or BMD, the data obtained in the present study indicate that up-regulated utrophin may have an unexpected influence on the function of the vascular or coagulation system.
    Type of Medium: Electronic Resource
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