title: [Regressive mitochondrial abnormalities in the muscular biopsy of a bicycling champion].
abstract: The onset of severe muscle cramps in the course of road racing led a champion to undergo a muscle biopsy. Fuscinophilic deposits were detected around muscle cell fibers together with a few PAS positive deposits. These findings were related to the accumulation of abnormal mitochondria and glycogen granules. The subsequent study of the mitochondrial respiratory chain did not reveal any modification and so ruled out a genuine mitochondrial myopathy. Such mitochondrial modifications are probably related to the onset of muscle cramps, but no metabolic disturbance could be found to account for these two phenomena.
authors.affiliation: Laboratoire d'Anatomie Pathologique, Centre Hospitalier Régional de Bordeaux, Hôpital Pellegrin.
authors.forename: C
authors.initials: C
authors.lastname: Vital
authors.forename: M
authors.initials: M
authors.lastname: Coquet
authors.forename: F
authors.initials: F
authors.lastname: Bellocq
authors.forename: T
authors.initials: T
authors.lastname: Letellier
authors.forename: T
authors.initials: T
authors.lastname: Vital
authors.forename: J P
authors.initials: JP
authors.lastname: Mazat
mesh_terms: D000328:Adult; D001642:Bicycling; D001706:Biopsy; D006801:Humans; D008297:Male; D008931:Mitochondria, Muscle / Q000648:ultrastructure*; D017240:Mitochondrial Myopathies / Q000150:complications / Q000473:pathology*; D009120:Muscle Cramp / Q000209:etiology*
vernacular_title: Anomalies mitochondriales régressives dans la biopsie musculaire d'un champion cycliste.