We report on a unique case of diffuse large B-cell lymphoma of the cecum, which presented as a subepithelial tumor. A 62- year-old woman with abdominal pain underwent a colonoscopy, resulting in detection of a subepithelial tumor measuring 2 cm in the cecum. We performed a right hemicolectomy with diagnostic and curative intent; histological examination and immunohistochemical staining of the resected tumor indicated a diagnosis of diffuse large B-cell lymphoma. The patient achieved complete remission with combination chemotherapy.

• Jung Mi Chang(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Younjoo Kim(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences) Corresponding Author
• Hye Jin Kang(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Jeong Su Baek(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Ei Rie Cho(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Seong Hyeon Lee(Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Ui Sup Shin(Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)
• Sun Hoo Park(Department of Pathology, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences)