Acute myeloid leukemia
B. Order a complete blood cell count
The patient started treatment with oral prednisone, 60 mg/d. Test results for syphilis, tuberculosis, and sarcoidosis were negative. One week later, the patient presented with fatigue and shortness of breath. A complete blood cell count revealed a white blood cell count of 90 000 cells/μL (reference range, 4500-10 000 cells/μL) (to convert to ×109 per liter, multiply by 0.001). A bone marrow biopsy specimen showed immature myeloid cells, which prompted a diagnosis of acute myeloid leukemia (AML).
Ocular involvement in AML is common, occurring in 73% to 89% of eyes according to a postmortem study.1 Involvement of the retina is found more frequently than other ocular tissues. Typical manifestations of ocular involvement include retinal hemorrhages and dilation as well as tortuosity of the venules.2