A 87-yr-old man with a history of neurosyphilis and thyroid isthmusectomy for follicular
carcinoma 40 yr previously was admitted to the hospital for evaluation of a recent onset of …

A follow-up total-body I-131 scan in a patient with follicular thyroid carcinoma demonstrated
radionuclide accumulation in the right hemithorax. Originally thought to be pulmonary …

In patients with differentiated thyroid cancer, radioiodine uptake in the mediastinal area most
often indicates thyroid cancer metastasis. We review 15 radioiodine whole-body scans …

McDougall listed 42 cases of physiologic and pathologic causes of abnormal distribution of
radioiodine that can be misinterpreted for metastatic cancer in whole-body I-131 scans. The …

Whole body imaging with radioiodine can detect functioning metastases, which can often be
effectively treated with appropriate amounts of radioiodine. Non-physiologic I-131 uptake …

A 78-year-old woman underwent neck and chest survey for follow-up of papillary carcinoma
of the thyroid. Forty years earlier the patient had a thyroidectomy, and 20 years earlier I-131 …

False-Positive I-131 Images Mimicking Thyroid Cancer Metasta... : Clinical Nuclear Medicine
False-Positive I-131 Images Mimicking Thyroid Cancer Metastasis: The Nose Ring Sign …

Radioiodine scans are highly specific for detecting metastases of well-differentiated thyroid
carcinomas. However, false-positive 131I whole-body scans may occur as illustrated in the …

After surgery for a papillary carcinoma of the thyroid, a 22-year-old man received I-131
therapy for thyroid ablation. A meningioma had been removed when the patient was 4 years …

In the post-thyroidectomy patient who has received I-131 ablation for thyroid carcinoma,
focal uptake on repeat total body images is usually interpreted as being indicative of …