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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).
Lee AG, Smith SV, Little LM. Visualization of a Hematoma of the Cloquet Canal. JAMA Ophthalmol. 2016;134(5):e155364. doi:10.1001/jamaophthalmol.2015.5364