Primary cardiac tumours in children are very rare, and most of them are non-cancerous. The disease often starts without obvious symptoms, and the symptoms that do occur can be varied, including issues like blockages, irregular heartbeats, clots, or systemic problems. Factors such as a child's age, medical history, the tumour's location, its size, and the number of masses are all important in differential diagnosis. CMR tissue characterization can help reduce the likelihood of misdiagnosis in children and lessen the stress of invasive procedures for both the child and their family. In our patient, we used Cine SSFP, T1 and T2 Weighted, gadolinium imaging and  Diffusion-weighted imaging. DWI is more well-known for CNS tumours and is helpful in differentiating between benign and malignant masses. Benign tumours in CNS mostly show free diffusion and no restriction. We assumed that the large size and immobility of the tumour allowed the correct technical performance of DWI. However, more research is needed to understand how well this promising technique can be used in cardiac masses.
In our case, the child has been diagnosed with a fibroma, and after a multidisciplinary team discussion, surgery was not an option for the patient, and she is currently under observation.