NKT cell lymphoma can be cured. Most of the NKT cell lymphomas are located outside the lymph nodes, and the primary lesions often occur in the nasal cavity and nasopharynx, which is clinically known as nasal NKT cell lymphoma, but some of them can also occur outside the nasal cavity or nasopharynx, such as in the testes and mediastinum, which is known as extranasal NKT cell lymphoma. The prognosis of nasal NKT cell lymphoma is relatively better than that of extranasal NKT cell lymphoma, especially for early stage nasal NKT cell lymphoma, after reasonable treatment, the prognosis is relatively good, generally the 5-year survival can reach 60%-70%, and may be cured.