2 research outputs found
A case of isolated thyroid metastasis that was diagnosed 24 years after renal cancer surgery
Get PDF 転移性甲状腺癌において原発部位は腎癌が最も多いとされているが，今回腎癌術後24年と長期間経過後に孤立性甲状腺転移の症例を経験したので報告する．症例は68歳，女性．既往歴に右乳癌，両側肺癌，左腎癌あり．右乳癌温存術後の放射線治療目的に前医より当院放射線治療部に紹介．位置決め CT で甲状腺右葉腫瘤を指摘され当科紹介．頸部超音波で甲状腺右葉に約３㎝大の被膜を有する低エコー腫瘤を認めた．穿刺吸引細胞診で良性との結果で経過観察としていた．その後，腫瘤の増大を認めたため，手術を勧め，甲状腺右葉切除術を行った．術後病理検査で腎癌（淡明細胞癌）の転移との診断であった．その後当院泌尿器科に紹介し，全身精査するも明らかな遠隔転移なく経過観察となっている．腎癌術後に甲状腺腫瘤を認める場合は転移の可能性を考慮する必要性があると考える． Renal cancer is the most common primary site of metastatic thyroid cancer. We report a case of solitary thyroid metastasis 24 years after renal cancer surgery. The patient was a 68-year-old woman. She had a history of right breast cancer, bilateral lung cancer, and left kidney cancer. She was referred to our radiotherapy department by her previous doctor for radiotherapy after right breast-conserving surgery as a positioning CT scan revealed a mass in the right lobe of the thyroid gland. Cervical ultrasound showed a hypoechoic mass with a capsule about 3 cm in size in the right lobe of the thyroid gland. Puncture aspiration cytology revealed that the mass was benign, and the patient was followed up for observation. Subsequently, the mass was found to be enlarged and surgery was recommended. Right lobe thyroidectomy was performed. Postoperative pathological examination revealed metastasis of renal cancer (clear cell carcinoma). The patient was referred to the Department of Urology at our hospital for a full-body examination, but there was no obvious distant metastasis, and the patient was under observation. When a thyroid mass is found after renal cancer surgery, the possibility of metastasis should be considered
