Abstract: Objective: Analysis of CT Imaging of nasal cavity Lymphoma NK/T cells,exploring its relatively specific performance.Methods: A retrospective analysis of 5 cases of nasal cavity Lymphoma NK/T cells confirmed clinical,surgical pathology and CT data.Result: 5 cases of NK/T cell lymphomas,both involving the nose or on the front vestibule,causing nasal swelling of the skin and subcutaneous tissue,adjacent to bone destruction or slightly less obvious,lesions larger density than even,mild enhancement.Conclusion: CT found in nasal cavity tumor on the front,without or with slight destruction or deformation of bone structure adjacent to nasal swelling under the skin on the back,you should consider NK/T-cell Lymphoma of the nasal cavity.