A Rare Silent Killer: Right Atrial Metastasis of Thyroid H  rthle Cell XXXX .

@entity1 @entity1353 @entity5 @entity189 @entity1151 @entity1150 @entity519 @entity1358 @entity1576 @entity3 @entity551
@entity1358 ( @entity1358 ) is a variant of a @entity189 with a tendency to higher frequency of @entity3 and a lower survival rate. However, intracavitary cardiac @entity3 from thyroid @entity1358 are extremely rare. We describe the case of a 57-year-old female with thyroid @entity1358 , 5 years after total thyroidectomy, who presented with @entity1353 associated with @entity519 and @entity551 . The computed tomography angiogram showed @entity1151 and a 6-cm right atrial mass while the lower-extremity @entity1150 studies were negative. This @entity1 received a cardiac thrombectomy using cardiopulmonary bypass support. However, intraoperatively, we found out that the mass was from the mediastinum, directly extending into the heart and clearly unresectable since it effaced at least 1/3 of the right atrial wall. The core biopsy of the mass confirmed that it was metastatic poorly differentiated @entity1358 of thyroidal origin. The @entity1 eventually died of @entity1576 due to a massive @entity1151 . For @entity5 @entity1 with unexplained @entity1353 , cardiac @entity3 should be considered regardless of anticoagulation prophylaxis, especially when there is no @entity1150 in the lower limbs. Early recognition of intracavitary cardiac @entity3 may help in providing prompt treatment and improving the prognosis.
