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We report a case in which a 52-year-old female developed a multifocal inflammatory myofibroblastic tumor (IMT) of the lung. The tumor did not overexpress the anaplastic lymphoma kinase (ALK) protein, indicating a lack of ALK rearrangement. The patient required two wedge resections in 15 months due to recurrent disease. Recurrence after the second surgery was treated with corticosteroids, which only led to a transient response (6 months). Introduction of celecoxib, a cyclooxygenase-2 inhibitor, induced a complete remission in the patient. Maintenance on celecoxib further led to a progression-free survival of 34 months. A literature review retrieved a total of eight case reports, comprising ten patients, of IMT of various anatomical sites successfully treated with non-steroidal anti-inflammatory agent (NSAID) therapy. Nine of the ten patients achieved durable complete remission. Remission occurred rapidly and persisted even after termination of NSAID therapy. Although such a successful outcome may only be achieved rarely, a trial of an NSAID should be considered in any patient in whom complete resection is not an option. Our case also demonstrates that NSAID therapy may be successful in a non-ALK rearranged tumor in which ALK inhibition is not an option.

oncology letters

Complete remission of ALK-negative plasma cell granuloma (inflammatory myofibroblastic tumor) of the lung induced by celecoxib: A case report and review of the literature