Inflammatory myofibroblastic tumor (IMT), a benign and rare neoplasm, of mesenchymal origin, pseudoarcomatous, is responsible for about 0.7% of all neoplastic presentations in the pulmonary region, being the most frequent cause of pulmonary nodules in pediatric patients, approximately 50% of the presentations. Thus, the present study aims to report a rare case of IMT in the lung site in a 31-year-old patient undergoing treatment for breast cancer, according to a literary review, relating the data according to the clinical presentation. Due to scarce documentation in the medical literature, no cases were found similar to the one described in relation to the reported oncological primary condition of the patient, making the present case a clinical challenge in modern medical practice.