Abstract: @@ Inflammatory myofibroblastic tumour (IMT) is rare in the nasal sinus. IMT is always considered as a stromal tumour with undetermined or low biological aggressiveness related to inflammatory fibrosarcoma.1,2 In February 2002, a case of IMT in the left maxillary was admitted to our department. However, the tumour was extremely malignant: radical excision and radiotherapy combined with chemotherapy after surgery did not contain it.