Background: Primary cardiac lymphoma (PCL) is an extremely rare tumour that typically affects the right heart chamber. It is a life-threatening tumour presenting with rapid growth; therefore, early diagnosis and treatment are crucial for improving the prognosis of patients with PCL.

Case Summary: An 81-year-old female with a history of dermatomyositis and interstitial pneumonia was referred to the cardiology department for cardiomegaly detected on chest radiography and computed tomography (CT). She experienced shortness of breath on exertion. Electrocardiography revealed negative T-waves in various leads. Transthoracic and transoesophageal echocardiography revealed a large mass on the epicardial free wall of the left atrium and ventricle. Coronary CT angiography showed feeding vessels from the left circumflex artery and the posterolateral branch of the right coronary artery. Positron emission tomography showed elevated mass uptake and no systemic metastasis. Needle biopsy with total endoscopic anterolateral mini-thoracotomy was performed. Histopathological examination revealed diffuse large B-cell lymphoma. She received systemic chemotherapy and achieved a complete metabolic response.

Discussion: Herein, we report an extremely rare case of PCL located on the left side of the heart. Owing to the location of the tumour, percutaneous or transcatheter biopsy could not be performed. Early diagnosis with needle biopsy via anterolateral mini-thoracotomy and systemic chemotherapy resulted in good outcomes.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10712447PMC
http://dx.doi.org/10.1093/ehjcr/ytad600DOI Listing

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