Anterior Chamber Cytology Confirms the Diagnosis of T-cell Prolymphocytic Leukemia Masquerading as Viral Retinal Necrosis.

T-PLL can rarely masquerade as a viral retinal necrosis. Diagnostic work-up should therefore always rule out the infectious causes of retinitis. Anterior chamber tap can sometimes prove useful in the diagnosis of T-PLL even in the absence of a hypopyon, avoiding the need for vitrectomy.