• Ling Wang, Lixia Cai, Xiangyu Chen, and Zhelan Zheng.
• Department of Ultrasound, Zhuji People's Hospital of Zhejiang Province, Zhuji.
• Medicine (Baltimore). 2021 Jan 8; 100 (1): e24225e24225.

RationalePrimary cardiac lymphoma is a rare tumor, especially a tumor located in coronary sinus (CS). The most common symptom of cardiac tumors is dyspnea, accounting for 64%, followed by chest pain, accounting for 26%. However, the cases with paroxysmal supraventricular tachycardia (SVT) as a major clinical presentation are extremely rare.Patient ConcernsWe report a 55-year-old female patient with primary CS lymphoma and paroxysmal SVT.DiagnosesAfter the surgical resection, pathology revealed the evidence of diffuse large B-cell lymphoma.InterventionsThe patient underwent chemotherapy after CS tumor resection.OutcomesThe patient was disease-free during the 6-month follow-up.LessonsCS enlargement may be the cause of SVT. Echocardiography should focus on the CS section to arrive at the right diagnosis.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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