Congratulations to the winner of our October quiz, Anna Gabrielian, MD, Chief Resident, Section of Ophthalmology and Visual Science, Department of Surgery, University of Chicago, Chicago, Illinois. The correct answer to our October challenge was leukemia. For a complete discussion of this case, see the Letters: Research Letters section in the November Archives (Bhatnagar A, Wilkinson LB, Tyagi AK, Willshaw HE. Subinternal limiting membrane hemorrhage with perimacular fold in leukemia. Arch Ophthalmol. 2009;127:1548-1550).