Customize your JAMA Network experience by selecting one or more topics from the list below.
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).
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).
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
Corresponding Author: Andrew G. Lee, MD, 6560 Fannin St, Ste 450, Houston, TX 77030 (email@example.com).
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Lee AG, Smith SV, Little LM. Visualization of a Hematoma of the Cloquet Canal. JAMA Ophthalmol. Published online May 01, 2016134(5):e155364. doi:10.1001/jamaophthalmol.2015.5364
Browse and subscribe to JAMA Network podcasts!
Create a personal account or sign in to: