Granulocytic Sarcoma of the lung in Acute Myeloid Leukemia

Background: Granulocytic sarcoma, an uncommon solid, extra-medullary tumor is a rare presentation of acute myeloid leukemia. Case characteristics: A seven-year old boy admitted to the hospital for treatment of leukemia having radiological findings of consolidation in one lung. Observation/Intervention: A bronchoalveolar lavage was done which was negative for tubercular, bacterial, and fungal infection but showed blast cells. Outcome: On day seven of chemotherapy, a repeat chest x-ray showed resolution of the lesion. A highresolution Computerized tomography of chest repeated after one month of induction showed resolution. Message: A consolidation on chest radiograph in acute myeloid leukemia can be a granulocytic sarcoma of the lung; a bronchoalveolar lavage may be offered to confirm or refute this diagnosis.