Abstract
We experienced a case of minimal thyroid carcinoma diagnosed by a solitary pulmonary nodule.
A 70-year-old woman visited a medical practitioner because of a cough, and was referred to our hospital due to an abnormality on the chest X-ray. Chest computed tomography (CT) showed a small nodule in the right upper lobe (S3). Because the nodule was diagnosed as adenocarcinoma by aspiration biopsy cytology during surgery, a right upper and middle lobe lobectomy was perfomed. The nodule in the right lung was diagnosed as metastasis from a thyroid carcinoma by histopathology, and subtotal thyroidectomy and neck dissection (D2a) were therefore perfomed two months later. There was micropapillary carcinoma of 8mm, 5mm and 3mm in the thyroid gland, but there was no cervical lymph node metastasis. There has been no recurrence so far.
