In summary, we present a case of previously undiagnosed retinal cavernous hemangioma with multiple episodes of mild vitreous hemorrhage presenting as a large clot overlying a vascular lesion.

A 33‑year‑old male presented with unilateral intermittent floaters and blurring of vision in the left eye for many years.In funduscopy of the left eye, contiguous clusters of red and dilated saccules with gray‑white surface gliosis were seen in the superior nasal quadrant. In addition, an overlying clotted vitreous hemorrhage and multiple adjacent smaller saccular aneurysmal venous dilations were visible . Fluorescein angiography showed a large blocking area caused by the clot. Multiple saccular‑shaped hyperfluorescences with plasma–erythrocyte level formation corresponding to dilated venules were visible around the clot. There was no leakage . These findings were compatible with the diagnosis of retinal cavernous hemangioma.

In our patient, the vascular lesion did not involve the macula, and no accompanying significant complications were noted; therefore, we preferred to regularly follow the patient.

Retinal cavernous hemangioma should be included in the differential diagnosis of recurrent vitreous hemorrhage.