Increased 99mTc Pertechnetate Uptake But Unimpressive 131I Activity in the Metastatic Mediastinal Lymph Nodes in a Thyroid Cancer Patient

Clin Nucl Med. 2019 Feb;44(2):176-178. doi: 10.1097/RLU.0000000000002405.

Abstract

False negative I accumulation in metastatic lesions of thyroid carcinoma could be due to various etiologies. Here we present a 33-year-old woman with a history of papillary thyroid cancer who had increased Tc pertechnetate activity in the mediastinal metastatic lymph nodes, which was not clearly seen on whole body I scan due to adjacent activity from lung metastases.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Biological Transport
  • Female
  • Humans
  • Iodine Radioisotopes*
  • Lung Neoplasms / secondary
  • Lymphatic Metastasis
  • Sodium Pertechnetate Tc 99m / metabolism*
  • Thyroid Neoplasms / diagnostic imaging*
  • Thyroid Neoplasms / metabolism
  • Thyroid Neoplasms / pathology*
  • Whole Body Imaging

Substances

  • Iodine Radioisotopes
  • Iodine-131
  • Sodium Pertechnetate Tc 99m