title: Olivary degeneration after cerebellar or brain stem haemorrhage: MRI.
abstract: Magnetic resonance (MR) images of seven patients with olivary degeneration caused by cerebellar or brain stem haemorrhages were reviewed. In four patients with cerebellar haemorrhage, old haematomas were identified as being located in the dentate nucleus; the contralateral inferior olivary nuclei were hyperintense on proton-density- and T2-weighted images. In two patients with pontine haemorrhages, the old haematomas were in the tegmentum and the ipsilateral inferior olivary nuclei, which were hyperintense. In one case of midbrain haemorrhage, the inferior olivary nuclei were hyperintense bilaterally. The briefest interval from the ictus to MRI was 2 months. Hypertrophic olivary nuclei were observed only at least 4 months after the ictus. Olivary degeneration after cerebellar or brain stem haemorrhage should not be confused with ischaemic, neoplastic, or other primary pathological conditions of the medulla.
authors.affiliation: Department of Radiology, Kyushu University Hospital, Fukuoka, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Uchino
authors.forename: K
authors.initials: K
authors.lastname: Hasuo
authors.forename: K
authors.initials: K
authors.lastname: Uchida
authors.forename: S
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Tsukamoto
authors.forename: M
authors.initials: M
authors.lastname: Ohno
authors.forename: K
authors.initials: K
authors.lastname: Masuda
mesh_terms: D000368:Aged; D001933:Brain Stem / Q000473:pathology; D002526:Cerebellar Diseases / Q000175:diagnosis*; D002531:Cerebellum / Q000473:pathology; D002543:Cerebral Hemorrhage / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D009847:Olivary Nucleus / Q000473:pathology; D009849:Olivopontocerebellar Atrophies / Q000175:diagnosis*; D011149:Pons / Q000473:pathology; D012189:Retrospective Studies