Incidental paratracheal lymph node lung adenocarcinoma in a patient with goiter: a case report

BACKGROUND: Paratracheal lymph nodes can be sites of metastasis for a variety of malignancies, but these metastases are treated differently depending on the tissue of origin. We describe a patient who underwent combined thoracoscopic and cervical resection of a multinodular goiter who was found to have incidental lung adenocarcinoma in an adjacent paratracheal lymph node despite having no pulmonary nodules. CASE DESCRIPTION: A 62-year-old male with longstanding substernal multinodular goiter presented to his primary care doctor with continued growth of his goiter. After repeatedly declining surgery, he became amenable to resection and underwent right video-assisted thoracoscopic and cervical approaches. An incidentally found separate large right paratracheal lymph node was also discovered and completely resected. Final pathology of the thyroid mass revealed hyperplastic thyroid nodules consistent with a benign goiter. However, the separate right paratracheal lymph node revealed a thyroid transcription factor 1-positive (TTF-1) specimen concerning for lung adenocarcinoma in the absence of pulmonary nodules on imaging. CONCLUSIONS: Noteworthy to this case is the minimally invasive thoracoscopic approach preventing the need for median sternotomy and preventing any increased morbidity for the patient’s incidentally found TxN3M0 lung adenocarcinoma. The patient could have been spared resection of the lymph node given its pulmonary origin as the standard of care for stage IIIB non-small cell lung cancer is definitive chemoradiation and adjuvant immunotherapy.