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Ophthalmic Images
May 12, 2016

Visualization of a Hematoma of the Cloquet Canal

Author Affiliations
  • 1Department of Ophthalmology, Blanton Eye Institute, Houston Methodist Hospital, Houston, Texas
  • 2Baylor College of Medicine, Houston, Texas
  • 3Department of Ophthalmology, Neurology, and Neurosurgery, Weill Cornell Medicine, New York, New York
  • 4Department of Ophthalmology, University of Texas Medical Branch, Galveston
  • 5Baylor College of Medicine and the University of Iowa Hospitals and Clinics, Iowa City
JAMA Ophthalmol. 2016;134(5):e155364. doi:10.1001/jamaophthalmol.2015.5364

A white man in his mid to late forties with a history of Huntington disease presented with acute painful left eye vision loss. He was diagnosed with acute angle-closure glaucoma secondary to iris neovascularization and underwent diode cyclophotocoagulation after combination topical and systemic medical treatment failed. Workup included ultrasonography examination owing to unsuccessful left fundus visualization. This revealed a hyperechoic lesion within the vitreous, consistent with a Cloquet canal hematoma (Figure, A). Magnetic resonance imaging of the orbit also confirmed the intravitreal hyperintense lesion located anterior to the optic nerve (Figure, B).

Figure.
A, B-scan ultrasonography of the left eye shows a Cloqeut canal hematoma (arrowhead). B, Magnetic resonance imaging demonstrates acute hemorrhagic products that appear hyperintense on T1 sequence (arrowhead).

A, B-scan ultrasonography of the left eye shows a Cloqeut canal hematoma (arrowhead). B, Magnetic resonance imaging demonstrates acute hemorrhagic products that appear hyperintense on T1 sequence (arrowhead).

Discussion

The Cloquet canal, or hyaloid canal, surrounds the hyaloid artery during embryonic growth, and persists in most healthy mature eyes.1-3 The patient’s imaging illustrates not only the persistent Cloquet canal but also its role as a potential space for hematoma formation following a retinal hemorrhage.4,5

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Article Information

Corresponding Author: Andrew G. Lee, MD, 6560 Fannin St, Ste 450, Houston, TX 77030 (aglee@tmhs.org).

Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.

References
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Mann  IC.  The relations of the hyaloid canal in the foetus and in the adult.  J Anat. 1928;62(pt 3):290-296.PubMedGoogle Scholar
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