Surgical resection of an ectopic thyroid carcinoma mimicking a right atrial mass in a dog

Abstract

AbstractThis case report describes the clinical presentation, imaging, treatment and outcome of a patient diagnosed with an ectopic thyroid carcinoma originating from the aortic body that was adhered to the right auricular appendage on the heart. The patient was diagnosed during investigation for pericardial effusion and underwent a surgical intervention with a subtotal pericardiectomy and excision of the mass. The mass was submitted for histopathology and was consistent with an ectopic thyroid carcinoma. The patient was followed up with an oncologist for treatment with toceranib phosphate (Palladia; Zoetis) and herbal supplements. Over 1 year and 7 months after surgery, the patient later developed and underwent treatment for a hepatic carcinoma and subsequently transitional cell carcinoma of the urinary bladder. The patient is still alive without evidence of metastasis of the ectopic thyroid carcinoma upon submission of this case report 35 months after initial presentation.