A Solitary Metastatic Lung Tumor from Thyroid Papillary Carcinoma Diagnosed by Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration (EBUS-TBNA): Report of a Case.

Abstract  A solitary metastatic tumor from thyroid papillary carcinoma is rarely diagnosed preoperatively. A 61-year-old woman was referred to us for investigation of a solitary nodule in the right lung field on a chest X-ray, several years after a right hemithyroidectomy for thyroid carcinoma. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) of a tumor in the right lower lobe, adjacent to the inferior pulmonary vein, revealed metastasis of thyroid papillary carcinoma. Immunohistochemical examination of histological cores obtained from the EBUS-TBNA proved extremely helpful in confirming the diagnosis. We performed right lower lobectomy with lymph node sampling, and the final pathological diagnosis was papillary carcinoma without lymph node metastasis. [ABSTRACT FROM AUTHOR]