{Reference Type}: Case Reports {Title}: Superior caval vein syndrome and cardiac inflammatory myofibroblastic tumour in an infant. {Author}: Soares BM;Soares AM;Aiello VD; {Journal}: Cardiol Young {Volume}: 33 {Issue}: 7 {Year}: 2023 Jul 18 {Factor}: 1.023 {DOI}: 10.1017/S1047951122003845 {Abstract}: The inflammatory myofibroblastic tumour, although very rare, must be considered in the differential diagnosis of intracardiac masses in children as it has systemic implications. We present a case of an infant whose diagnosis was suspected on clinical basis and echocardiogram, but the anatomopathological analysis with immunohistochemical study was essential for the conclusion of the histological type and orientation of the clinical follow-up.