Accessory extraocular muscles are rare intraorbital congenital structures that can cause diplopia and restrictive strabismus.
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| http://dx.doi.org/10.5334/jbsr.3807 | DOI Listing |
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Accessory Extraocular Muscle: A Rare Cause of Strabismus.
J Belg Soc Radiol
November 2024
Neuroradiology Unit, Medical Imaging Department, Coimbra Local Health Unit, Coimbra, Portugal.
Accessory extraocular muscles are rare intraorbital congenital structures that can cause diplopia and restrictive strabismus.
View Article and Find Full Text PDFRadiologic evaluation in the diagnosis of diplopia due to unilateral accessory extraocular muscle.
Radiol Case Rep
January 2025
Department of Neurointerventional Radiology, Reno Radiological Associates, Reno, NV 89434, USA.
This case report details a case of a 52-year-old female with a history of diplopia and an elevation deficit in her right eye. Initially misdiagnosed as an atavistic retractor bulbi muscle in 2005 via MRI, symptoms persisted despite surgical excision. Follow-up MRI in 2023 confirmed no changes, ruling out other causes like nerve palsy or schwannoma, and ultimately guiding diagnosis towards an accessory extraocular muscle.
View Article and Find Full Text PDFNumerical Aberrations of the Extraocular Muscles and the Levator Palpebrae Superioris: An Anatomical and Clinical Insight.
Ophthalmic Plast Reconstr Surg
October 2024
Department of Ophthalmology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A.
Purpose: To comprehensively review the literature about numerical aberrations of the orbital muscles of ocular motility (here referred to as extraocular muscles [EOMs]) and the levator palpebrae superioris (LPS).
Methods: The authors summarize the embryologic bases and the possible etiopathogenetic causes of numerical aberrations of the EOMs and the LPS and organize these lesions into several broad categories. The clinical and radiologic diagnostic challenges are discussed.
Challenges in management of congenital enophthalmos due to anomalous accessory orbital extraocular muscle bands.
Strabismus
September 2024
Department of Ophthalmology, Boston Children's Hospital, Boston, MA, USA.
Article Synopsis
- Congenital enophthalmos is a rare eye condition where the eyeball is displaced backward, often linked to orbital bone issues or defects in eye development; this report details two unrelated cases caused by unusual accessory orbital muscle bands.
- The study reviewed case records of two patients with this condition, using high-resolution MRI to explore imaging features and surgical outcomes, including a 3D model for one case's surgical approach.
- Findings showed both patients had severe unilateral enophthalmos, but one required no surgery due to risks near the optic nerve, while the other didn't improve post-surgery due to scarring, highlighting the diagnostic and treatment challenges of this rare condition.
Accuracy of Repetitive Ocular Vestibular-Evoked Myogenic Potentials to Diagnose Myasthenia Gravis in Patients With Ptosis or Diplopia.
Neurology
May 2024
From the Neurology Department (Y.V., M.K.S., C.J.B., D.S., B.S., K.P.W.), Clinical Neuroscience Center, and Ophthalmology Department (M.A.W., F.C.F., T.S.-M., C.J.B., K.P.W.), University Hospital Zurich, University of Zurich, Switzerland; Neurology Department and Institute of Clinical Neurosciences (S.R.), Royal Prince Alfred Hospital, Camperdown; and Central Clinical School (S.R.), Faculty of Medicine and Health, University of Sydney, Australia.
Background And Objectives: We developed repetitive ocular vestibular-evoked myogenic potentials (roVEMP) as an electrophysiologic test that allows us to elicit the characteristic decrement of extraocular muscles in patients with ocular myasthenia gravis (OMG). Case-control studies demonstrated that roVEMP reliably differentiates patients with OMG from healthy controls. We now aimed to evaluate the diagnostic accuracy of roVEMP for OMG diagnosis in patients with ptosis and/or diplopia.
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