TY - JOUR
T1 - Oculomotor Abnormalities in Large Cerebellopontine Angle Tumors
T2 - A Case Series of Bruns' Nystagmus
AU - Bilotta, Giada
AU - Stultiens, Joost
AU - Menovsky, Tomas
AU - Temel, Yasin
AU - Lammers, Marc
AU - Vanderveken, Olivier M.
AU - van de Berg, Raymond
AU - Van Rompaey, Vincent
PY - 2022/7
Y1 - 2022/7
N2 - Patients with large or giant large cerebellopontine angle lesions can present with a wide range of audiovestibular symptoms, including Bruns' nystagmus. This is a rare variant of bidirectional nystagmus, characterized by a combination of slow, large-amplitude nystagmus when looking to the side of the lesion and rapid small-amplitude nystagmus when looking to the contralateral side. This phenomenon arises due to a unique situation in which 2 different neural circuits, specifically the floccular pathways and peripheral vestibular pathways, are simultaneously involved. The presence of Bruns' nystagmus is a good indicator for large CPA lesions of at least 3 cm in diameter with compression and displacement of the cerebellum, comprising the flocculus, and/or the brainstem. A case series of 4 different cases illustrates that investigating the presence of such nystagmus could be incorporated into the common diagnostic work-up of CPA lesions, since it is of particular interest in localizing large CPA tumors requiring urgent imaging.
AB - Patients with large or giant large cerebellopontine angle lesions can present with a wide range of audiovestibular symptoms, including Bruns' nystagmus. This is a rare variant of bidirectional nystagmus, characterized by a combination of slow, large-amplitude nystagmus when looking to the side of the lesion and rapid small-amplitude nystagmus when looking to the contralateral side. This phenomenon arises due to a unique situation in which 2 different neural circuits, specifically the floccular pathways and peripheral vestibular pathways, are simultaneously involved. The presence of Bruns' nystagmus is a good indicator for large CPA lesions of at least 3 cm in diameter with compression and displacement of the cerebellum, comprising the flocculus, and/or the brainstem. A case series of 4 different cases illustrates that investigating the presence of such nystagmus could be incorporated into the common diagnostic work-up of CPA lesions, since it is of particular interest in localizing large CPA tumors requiring urgent imaging.
KW - Brainstem
KW - Cerebellum
KW - Neurilemmoma
KW - Pathologic nystagmus
KW - Vertigo
U2 - 10.5152/B-ENT.2022.21793
DO - 10.5152/B-ENT.2022.21793
M3 - Article
SN - 1781-782X
VL - 18
SP - 204
EP - 207
JO - B-ENT
JF - B-ENT
IS - 3
ER -