Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 13 1 2018 02 24 24 26 EN Hikmet Sahratov Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. Adem Guler Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. Mustafa Kurkluoglu Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. Bahadır Calişkan Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. Fahri Yesil Department of Cardiovascular Surgery, Etimesgut Military Medical Hospital, Ankara, Turkey. Murat Tavlasoglu Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. Mehmet Sahin Department of Cardiovascular Surgery, Gulhane Military Medical School, Ankara, Turkey. 2016 02 22 2017 07 12 Inflammatory myofibroblastic tumors (IMTs) of the lung are rare solid tumors and usually affect children and young adults. We describe an unusual form of an IMT of the left lower lobe invading the left atrium. A 9-year-old male patient with recurrent cough was referred for an evaluation of left-lung pneumonia. Transthoracic needle biopsy was performed, and the histopathological examination showed mixed inflammatory cells. Accordingly, an IMT was considered. Left lower lobectomy was performed. A portion of the tumor invading the left atrium was resected together with the intact atrial wall. The postoperative period was uneventful, and the patient was discharged on the sixth postoperative day. https://rhythm.tums.ac.ir/index.php/jthc/article/view/500 https://rhythm.tums.ac.ir/index.php/jthc/article/download/500/647