Abstract
We report DTI and fiber tractography findings in a case of hypertrophic olivary degeneration. A 51-year-old man presented with an abnormal gait and visual difficulties. MR imaging showed enlargement of the right medullary olive and a vascular lesion in the right pontine tegmentum. Fiber tractography showed decreased volume of the right central tegmental tract, supporting a diagnosis of HOD.
Highlights
H OD is a degenerative disorder of the inferior olivary nucleus that occurs after an insult to the dentatorubro-olivary pathway
We present a case of hypertrophic olivary degeneration in which demonstration of a decrease in the volume of the central tegmental tract by DTI and fiber tractography contributed to the diagnosis
Lesions in contralateral cerebellum and superior cerebellar peduncle or the ipsilateral brain stem involving the red nucleus and central tegmental tract are likely to result in HOD, whereas lesions of inferior cerebellar peduncle do not cause HOD
Summary
We present a case of hypertrophic olivary degeneration in which demonstration of a decrease in the volume of the central tegmental tract by DTI and fiber tractography contributed to the diagnosis. There was decreased volume of the central tegmental tract ipsilateral to the medullary lesion without deviation, deformation, or interruption.
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