Complex polysaccharide inclusions in skeletal muscle adjacent to sarcomas in two dogs.
Inclusions of periodic acid-Schiff-positive, amylase resistant material were found within skeletal muscle fibers adjacent to an osteosarcoma in the proximal femur of an 8-year-old intact female Cocker Spaniel dog (dog No. 1) and adjacent to a synovial cell sarcoma of the stifle joint in a 7-year-old spayed female Bouvier des Flandres dog (dog No. 2). Inclusions were pale blue-gray with hematoxylin and eosin stain and formed irregular inclusions, replacing up to approximately 80% of the fiber diameter. Inclusions from dog No. 2 were of non-membrane-bound granular to filamentous material that occasionally formed discrete, elongate electron-dense masses. The features of these inclusions were similar to those of materials previously described as complex polysaccharide, polyglucosan bodies, amylopectin, and Lafora bodies. Evidence for a generalized metabolic disorder was not found in these two dogs, suggesting that storage of complex polysaccharide can occur as a relatively nonspecific response to metabolic alterations in skeletal muscle in a variety of conditions.
Valentine
B A
BA
Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis 97331, USA.
Bildfell
R J
RJ
Cooper
B J
BJ
Giger
U
U
Fischer
K A
KA
D000687:Amylopectin / Q000378:metabolism; D000818:Animals; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005260:Female; D005266:Femoral Neoplasms / Q000473:pathology / Q000662:veterinary*; D007592:Joint Diseases / Q000473:pathology / Q000662:veterinary; D008854:Microscopy, Electron / Q000662:veterinary; D018482:Muscle, Skeletal / Q000378:metabolism* / Q000473:pathology / Q000648:ultrastructure; D012516:Osteosarcoma / Q000473:pathology / Q000662:veterinary*; D011134:Polysaccharides / Q000378:metabolism*; D013584:Sarcoma, Synovial / Q000473:pathology / Q000662:veterinary*; D013264:Stifle
D011134:Polysaccharides; D000687:Amylopectin