Primary Granulocytic Sarcoma of the Mediastinum

Primary granulocytic sarcoma (GS) is rare, and poses a diagnostic pitfall for both pathologists and oncologists. Previous literature showed that almost half of the patients with primary GS were misdiagnosed initially. We presented the clinico-pathological and radiological features of a patient with primary mediastinal GS, and discussed the differential diagnoses and clinical management.