甲状腺转移癌在尸检中常见,但临床上则罕见。本文报告4例,其中2例来自乳腺癌,另2例来自气管癌。甲状腺转移癌常来自恶性黑色素瘤、支气管癌、乳腺癌和肾癌。此癌大多无临床症状,在甲状腺中较少见到明显转移灶。甲状腺转移癌,若原发灶已控制,又未发现远处转移,则应为手术的适应症。 Metastatic thyroid cancer is common at autopsy but rare in clinical practice. This article reports 4 cases, 2 of them from breast cancer, and the other 2 from tracheal cancer. Metastatic thyroid cancer often comes from malignant melanoma, bronchial cancer, breast cancer, and kidney cancer. Most of the cancers have no clinical symptoms, and fewer metastatic lesions are seen in the thyroid gland. Thyroid metastatic carcinoma, if the primary lesion has been controlled and no distant metastasis is found, it should be an indication for surgery.