Computed tomography (CT) findings of 56-year-old woman with primary gingival involvement (A) and 48-year-old man with nasal cavity and naso-oropharynx involvement by myeloid sarcoma (B, C). (A) Contrast-enhanced axial CT scan of the neck shows lytic destruction of the right side alveolar bone. (B) Contrast-enhanced axial CT scan of the neck shows diffuse thickening of the nasal cavity. (C)¹⁸Fluorine-labeled glucose axial PET scan shows strong focal uptake by the same lesions seen on the CT scan.