Cancer is known to be a hypercoagulable state as described initially
by Trousseau in 1865.1 The mechanism is
not well understood. Among the thrombotic events that may accompany tumors,
ophthalmic thrombosis, especially retinal vein occlusion, is a known but uncommon
phenomenon. However, simultaneous bilateral central retinal vein occlusion
is quiet rare and was never described in the literature as a symptom of cancer.
Segev F, Segev A, Livne A, Assia EI, Mekori YA. Bilateral Central Retinal Vein Occlusion in a Patient With Occult Colon Cancer. Arch Ophthalmol. 2001;119(10):1552–1553. doi:
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