Degenerazione ipertrofica delle olive inferiori Segnalazione di un caso

Abstract

Olivary hypertrophic Degeneration (OHD) is usually due to hemorrhagic lesions in the “Guillain Mollaret” triangle: trangular morphologic and functional relationship between the red nucleus and inferior olivary nucleus on one side and the controlateral dentate nucleus.

The hemorrhage involves the pons-midbrain tegmentum on the same side of the olive or the controlateral superior cerebellar peduncle and/or dentate nucleus.

It is regarded as transsynaptic degeneration and has typical MR features: morphologic changes and increased signal intensity on DP-T2 weighted images, with a carachteristic chronologic evolution after acute injury.

We present a case report.

Keywords

Olive hypertrophy Hemorrage

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References

Goto

Kaneko

: Olivary enlargment: Chronological and morphometric analysis. Acta Neurophat 54: 275–282, 1981.

Hirono

Kameyama

: MR demonstration of a unilateral olivary hypertrophy caused by pontine tegmental hematome. Neuroradiology 32: 340–342, 1990.

Kim

Lee

: Cerebellar MR changes in patients with olivary hypertrophic degeneration. ASNR, 15: 1715–1719, 1994.

Kitajima

Korogi

: Hypertrophic olivary degeneration: MR imaging and pathologic findings. Radiology, 192: 539–543, 1994.

Revel

Brugieres

: MR appearance of hypertrophic olivary degeneration after controlateral cerebellar hemorrhage. Am J Neuroradiol, 12: 71–72, 1991.

Terao

Sobue

: Serial MRI of olivary hypertrophy: Long term follow-up of a patient with the “top of the basilar” syndrome. Neuroradiology 37: 427–428, 1995.

Uchino

Hasuo

: Olivary degeneration after cerebellar or brainstem hemorrhage: MRI. Neuroradiology, 35: 335–338, 1993.

Zarranz

Font

: MR imaging of presumed olivary hypertrophy in palatal myoclonus. Am J Neuroradiol, 11: 1164, 1990.