Abstract
Tumor thrombus in left atrium (LA) is very rare but a serious complication in patients with malignancy. It has a significant impact on clinical decision making, staging and prognosis in oncological patients. Tumor thrombus is seen in a wide variety of malignancies. While rare, lung cancer tumor thrombus may occur. Rarely, it can even extend into LA. Usually, it is managed by surgical resection with chemotherapy. We describe a rare case of tumor thrombus in a patient with squamous cell carcinoma of lung that was managed with chemo- and radiation therapy.