Abstract
Objective: To report a case of a patient diagnosed in July 2019 with leukostasis secondary to acute myeloid leukemia, with manifestation of acute respiratory syndrome. Case details: Patient from Manaus-AM, 70 years old, presenting with abdominal pain and significant chest discomfort beginning three months ago, seeking emergency service three times, and being diagnosed with atrial fibrillation. Important leukocytosis (> 200,000) was found in exams in the emergency department. Interned for diagnostic investigation. The patient only improved her clinical condition after performing cytoreduction with hydroxyurea, with a decrease in the leukocyte count to 50,000. With that, the clinical diagnosis of leukostasis, secondary to acute myeloid leukemia, was reached, with significant pulmonary and mild neurological impairment. Final considerations: The follow-up of this case allowed us to observe the complexity of the clinical picture developed by the patient and the importance of early diagnosis and the establishment of adequate treatment, preventing the symptoms from getting worse, putting the patient's life at risk.