Conclusions
In summary,this report described a patient with MLS in the thigh, accompanied by 2 recurrences after surgery and ectopic and metachronous cardiac metastases. Cardiac metastases from MLS are rare, the prognosis is poor, and long-term follow-up of patients after discharge is necessary. CMR is useful to clarify the diagnosis of cardiac metastases, to define the anatomical relationship between the metastases and cardiac tissue and to determine myocardial activity and whether the myocardium is invaded. The whole-body MRI and PET-CT are the most reliable modalities for surveillance of all likely sites of extrapulmonary metastases.