title: "Nine" syndrome: A new neuro-ophthalmologic syndrome: Report of two cases.
abstract: "Eight-and-a-half" syndrome is a rare condition involving the ipsilateral abducens nucleus or paramedian pontine reticular formation (PPRF), the ipsilateral medial longitudinal fasciculus (MLF), and the adjacent facial colliculus/facial nerve fascicle. The condition is often caused by a lesion (vascular or demyelinating) in the dorsal tegmentum of the caudal pons. There are new variants of this syndrome caused by extension of lesion to involve new adjacent structures in pontine tegmentum. We report two patients with different etiology presenting with clinical features suggestive of eight-and-a-half syndrome associated with hemiataxia representing "nine" syndrome (8½ + ½ = 9) adding new dimension to "eight-and-a-half" syndrome.
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Rohan R
authors.initials: RR
authors.lastname: Mahale
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Anish
authors.initials: A
authors.lastname: Mehta
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Aju Abraham
authors.initials: AA
authors.lastname: John
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Mahendra
authors.initials: M
authors.lastname: Javali
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Mirza Masoom
authors.initials: MM
authors.lastname: Abbas
authors.affiliation: Department of Neurology, Mathikere Sampangappa Ramaiah Medical College and Hospital, Bangalore, Karnataka, India.
authors.forename: Srinivasa
authors.initials: S
authors.lastname: Rangasetty
keywords: Demyelination; eight-and-a-half syndrome; hemorrhage; medial longitudinal fasciculus; paramedian pontine reticular formation; pons; tegmentum