corpora amylacea (polyglucosan body)

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Introduction

Corpora amylacea accumulate with age in astrocyte processes, principally in subpial & subependymal regions around blood vessels. They are spherical, basophilic, PAS(+), sometimes concentrically laminated structures with a diameter of 1-150 uM. Ultrastructurally, they are composed of branched filaments 8 nM in diameter. Composition is chiefly glucose polymers with variable content of phosphate & sulfate. Protein content is <5%.

More general terms

References

  1. Cotran et al Robbins Pathologic Basis of Disease, W.B. Saunders Co, Philadelphia, PA 1989 pg 1388.