CTICasesIntracardiac Mature Cystic Teratoma
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Imaging findings
Cardiac MRI demonstrates a large, heterogeneous, lobulated mass within the right ventricle, showing high signal intensity on T2-weighted and black-blood sequences with foci of fat and proteinaceous fluid. The mass is adherent to the tricuspid valve apparatus and papillary muscles, and pathology post-resection confirms a mature cystic teratoma containing multiple tissue types, including cystic spaces and focal brain tissue.
Key takeaways
Intracardiac teratomas are exceedingly rare benign germ cell tumors, typically diagnosed in infants and children but occasionally presenting in adults. They most commonly arise within the pericardial space, and primary intracardiac (cavity) presentation is highly unusual, requiring surgical resection and potentially valve replacement if the tumor is densely adherent to the subvalvular apparatus.
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