Paroxysmal supraventricular tachycardia as a major clinical presentation of the primary coronary sinus lymphoma A case report

Rationale: Primary 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 concerns: We report a 55-year-old female patient with primary CS lymphoma and paroxysmal SVT. Diagnoses: After the surgical resection, pathology revealed the evidence of diffuse large B-cell lymphoma. Interventions: The patient underwent chemotherapy after CS tumor resection. Outcomes: The patient was disease-free during the 6-month follow-up. Lessons: CS enlargement may be the cause of SVT. Echocardiography should focus on the CS section to arrive at the right diagnosis.