Feridoun SabziReza Faraji2026-10-072026-10-072014https://doi.org/10.31729/jnma.2724https://hdl.handle.net/20.500.14572/8010Abstract Myxomas are the most common benign cardiac tumors. Myxomas are more common in the left heart chamber than the right side chamber. An extracardiac origin presenting as a right atrial mass is very rare. Right-sided tumors are considerably less common than left-sided tumors, and however myxoma of great vessels origin presenting as right atrial masses are rare but radiation induced villous myxoma in superior vena cava (SVC) is exceedingly rare tumor. A case of radiation induced myxoma originating in a previously undescribed location and presenting as a right atrial mass is reported. Keywords: Myxoma; Right atrial; Vena cava.en-USMyxomaRight atrialVena cavaArticle