Mitochondrial abnormalities in progressive ophthalmoplegia.

Abstract

A clinically diagnosed case of progressive external ophthalmoplegia was biopsied and ultrastructurally evaluated. The disease was found to be characterized by numerous giant mitochondria. The intramitochondrial changes consisted of either swirls of cristae or of paracrystalline structures which were in apposition with the membranes of the cristae. The internal structure of the paracrystalline units consisted of parallel bands of material which were aligned in the same plane as the membranes of the related cristae.

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