title: Metastatic Papillary Thyroid Carcinoma Presenting as Abducens Palsy Complicated by Ocular Neuromyotonia.
abstract: Papillary thyroid carcinoma (PTC) is a type of well-differentiated thyroid cancer that accounts for the majority of thyroid malignancies. The prognosis of PTC is very good and distant metastases are rare, especially to the skull base. The authors report the case of a 47-year-old woman with biopsy-proven PTC treated with surgery and radiation therapy who presented with headache and diplopia after 5 years and was found to have clivus and cavernous sinus metastasis. Following radiation therapy for her skull base and cavernous sinus lesion, she subsequently developed sixth nerve ocular neuromyotonia. Possible causes and treatments are reviewed.
authors.affiliation: Department of Neurology, Baylor Scott and White Health , Temple, Texas, USA.
authors.forename: Niloofar
authors.identifier: 0000-0002-0312-6296
authors.initials: N
authors.lastname: Yari
authors.affiliation: Centro Medico Zambrano Hellion-Tec Salud , Monterrey, Mexico.
authors.forename: Angelina
authors.initials: A
authors.lastname: Espino Barros Palau
authors.affiliation: Department of Ophthalmology and Visual Sciences, University Hospitals Eye Institute, Case Western Reserve University School of Medicine , Cleveland, Ohio, USA.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Morgan
authors.affiliation: UT MD Anderson Cancer Center , Houston, Texas, USA.
authors.forename: Nicholas B
authors.initials: NB
authors.lastname: Levine
authors.affiliation: UT MD Anderson Cancer Center, Houston, Texas, USA; Department of Ophthalmology, Houston Methodist Hospital, Houston, Texas, USA; Departments of Ophthalmology, Neurology, and Neurosurgery, Weill Cornell Medical College, Houston, Texas, USA; University of Texas Medical Branch, Galveston, Texas, USA.
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Lee
keywords: Abducens palsy; clivus; metastasis; ocular neuromyotonia; papillary thyroid cancer; skull