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. 2013:2013:536231.
doi: 10.1155/2013/536231. Epub 2013 Mar 27.

Inclusion-body myositis associated with Alzheimer's disease

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Inclusion-body myositis associated with Alzheimer's disease

Danijela Levacic et al. Case Rep Med. 2013.

Abstract

Sporadic inclusion-body myositis (s-IBM) is a myopathy that is characterized by progressive weakness and muscle pathology demonstrating inflammation and rimmed vacuoles. In addition, similar to the pathology observed in the brains of patients with Alzheimer's disease, the deposition of beta-amyloid and phosphorylated tau proteins in muscle fibers has been reported. These shared pathologic features have prompted hypotheses suggesting a shared etiology of these two conditions. We report a case of a 73-year-old woman initially diagnosed with s-IBM who later developed Alzheimer's disease.

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Figures

Figure 1
Figure 1
(a) Muscle fiber showing rimmed vacuoles (granular, red) (long arrows), and fiber splitting (short arrow). (b) Muscle fiber showing slit-like rimmed vacuoles (Long arrows), with fiber splitting (short arrow). Histochemistry, section of anterior tibialis muscle stained with Engel's modified Gomori trichrome stain. Isopentane cooled in liquid nitrogen frozen section. 25× original magnification.

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