Occult papillary carcinoma of the thyroid with distant metastases

摘要: It is well established that small clinically undetected thyroid carcinomas can produce extensive lymphatic metastases. However, occult papillary carcinoma of the presenting as a large blood-borne metastasis and leading to death are both uncommon. The authors report two unusual cases thyroid. first case 2.4 mm microscopic solitary pulmonary metastasis, one smallest reported primary distant hematogenous metastasis. second represents lethal with metastases not diagnosed until autopsy. These effectively illustrate absence detectable abnormality does exclude possibility from minute or