Leukostasis retinopathy with leukemic infiltrates as onset manifestation of chronic myeloid leukemia: a case report.

PURPOSE To describe a case of retinopathy as onset manifestation of chronic myeloid leukemia (CML), successfully treated with leukapheresis and medical therapy. METHODS A 28-year-old male patient presented complaining painless acute visual impairment in his right eye (RE). He reported moderate asthenia and episodes of night sweats during the previous month. His past medical history was unremarkable. BCVA at presentation was 20/80 in RE and 20/32 in left eye (LE). Fundus examination revealed venous congestion, diffuse Roth spots, and whitish macular infiltrates in both eyes. OCT showed hyperreflective foveal infiltrates, in both eyes. Blood test showed markedly elevated white blood cells (WBCs) count (430 × 103/mm3). Clinical-instrumental examination revealed hepatosplenomegaly. These features were consistent with CML. The patient was treated with leukapheresis and nilotinib. RESULTS After 2 weeks of treatment, the WBCs count dropped (71 × 103/mm3), and the patient reported subjective improvement of symptoms. At 1-month follow-up, BCVA and retinopathy signs were improved in both eyes. OCT showed the almost complete resolution of foveal infiltrates with ellipsoid zone focal defects. At 4-months follow-up, we observed complete resolution of retinopathy. BCVA was 20/32 in RE and 20/25 in LE. OCT showed the persistence of ellipsoid zone focal defects in RE and complete anatomical restoration in LE. At 6-months follow-up, the patient was clinically well and his WBCs count was normal. CONCLUSION In our case, the CML-related retinopathy represented the onset sign of the underlying systemic pathology, leading to proper management and treatment, with hematological normalization and resolution of the retinopathy.