• Jia Li, Changli Zhou, Wanqi Liu, Xun Sun, and Xiangwei Meng.
• From the Department of Gastroenterology, First Hospital of Jilin University From the Department of Internal medicine, Nursing School of Jilin University From the Department of Gastroenterology From the Department of Pathology From the Department of Gastroenterology, First Hospital of Jilin University, Changchun, Jilin, China.
• Medicine (Baltimore). 2017 Dec 1; 96 (50): e8873e8873.

RationaleThe synchronous occurrence of lung cancer in patients with gastric neoplasms is relatively uncommon, especially the cases of synchronous coexistence of small cell lung carcinoma and diffuse large B-cell lymphoma of the stomach.Patient ConcernsWe encountered a case of synchronous primary small cell lung carcinoma and diffuse large B-cell lymphoma of the stomach. A 63-year-old patient with a 7.5 × 5.09 cm mass in the superior lobe of the right lung diagnosed with small cell lung cancer and synchronous diffuse large B-cell lymphoma of the stomach.DiagnosesThe diseases were diagnosed by the pathological biopsy and immunohistochemical methods.InterventionsAs the patient received CHOP chemotherapy, pulmonary function deterioraed. Etoposide was added to the chemotherapy.OutcomesHowever, after the first treatment, chest computed tomography showed that the mass in the superior lobe of the right lung had increased to 8.5 × 5.2 cm.LessonsThis report draws attention to the fact that the treatment of synchronous tumors is a challenge.Copyright © 2017 The Authors. Published by Wolters Kluwer Health, Inc. All rights reserved.

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