Renal Cell Carcinoma Metastasizing to the Myocardium: A Comprehensive Literature Review of Diagnostic and Therapeutic Challenges

TL;DR

This paper reviews the rare occurrence of kidney cancer spreading to the heart, highlighting the challenges in diagnosis and treatment.

Contribution

The paper provides a comprehensive literature review on the rare condition of renal cell carcinoma metastasizing to the myocardium.

Findings

Renal cell carcinoma rarely metastasizes to the heart, often mimicking cardiopulmonary conditions.

Diagnosis relies on multimodal imaging, including echocardiography and cardiac MRI.

Treatment options are limited, with outcomes remaining poor due to sparse evidence.

Abstract

Renal cell carcinoma is a type of cancer that occurs in adults and typically metastasizes to the lungs, liver, bone, and brain. Cardiac involvement is far less common and often goes unrecognized, as its clinical manifestations can mimic those of more prevalent cardiopulmonary conditions, leading to substantial morbidity. This review examines the epidemiology, mechanisms of spread, patterns of presentation, diagnostic approaches, and treatment strategies for renal cell carcinoma involving the myocardium. Mechanisms include direct extension through the inferior vena cava to the right atrium, hematogenous dissemination, and, less frequently, lymphatic spread. Clinical findings range from incidental imaging abnormalities to presentations involving heart failure, arrhythmias, or cardiac tamponade. Diagnosis relies on multimodal imaging, with echocardiography and cardiac MRI providing complementary information. Management options include surgery in selected cases and systemic therapies, although available evidence is mainly derived from case reports and small series. Overall outcomes remain poor. Early recognition, coordinated multidisciplinary care, and further research are needed to guide management in this rare clinical setting.

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