Abstract:
:Paroxysmal tonic upgaze of childhood is an eye movement abnormality characterized by periodic episodes of conjugate upward eye deviation. Although the spectrum of paroxysmal tonic upgaze has broadened considerably, a specific pathophysiology has not been elucidated. We report an infant with paroxysmal tonic upgaze who presented to his pediatrician with associated hypotonia and gross motor delay. High-resolution chromosome analysis demonstrated a supernumerary dicentric bisatellited marker chromosome. Analysis revealed partial tetrasomy of 15q. Given the significant amount of euchromatin demonstrated, it is likely that the chromosomal abnormalities are causative for the constellation of manifestations in this patient. To date, a specific genetic abnormality has not been associated with paroxysmal tonic upgaze. The finding of a genetic association with paroxysmal tonic upgaze might help characterize the substrate for ophthalmologic manifestations. Further study in this chromosomal region in patients with paroxysmal tonic upgaze is warranted.
journal_name
J Child Neuroljournal_title
Journal of child neurologyauthors
Joseph K,Avallone J,Difazio Mdoi
10.1177/08830738050200021601subject
Has Abstractpub_date
2005-02-01 00:00:00pages
165-8issue
2eissn
0883-0738issn
1708-8283journal_volume
20pub_type
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