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A 45-year-old man presented with a mobile shadow in the central visual field of his left eye for the preceding 4 months. His visual acuity was not affected. Funduscopy showed a brownish, oval-shaped structure floating in the vitreous cavity of the left eye. B-scan ultrasound demonstrated an oval-spherical hypoechogenic structure floating at the posterior pole. The absence of pertinent medical history and normal results from systemic exploration suggested a congenital etiology. The condition was observed regularly without any evidence of change. Differential diagnosis of vitreous cysts is important in order to establish an adequate therapeutic approach., (Copyright 2014, SLACK Incorporated.)

Systemic cancer may present intraocular features in three forms: as a sign of the presence of lymphoreticular tumors, of solid tumors or as a paraneoplastic syndrome.