Diagnostic and Therapeutic Uptake of Intrathyroid Metastasis of Midgut Neuroendocrine Tumor on 68Ga-DOTANOC PET/CT and 177Lu-DOTATATE Imaging

Clin Nucl Med. 2019 Jul;44(7):e445-e448. doi: 10.1097/RLU.0000000000002586.

Abstract

A 58-year-old woman with 5-year history of grade 1 progressive metastatic intestinal neuroendocrine tumor with metachronous liver metastases initially treated by surgery and liver embolization underwent Ga-DOTANOC PET/CT before Lu-DOTATATE therapy. Ga-DOTANOC PET/CT revealed increased uptake in several liver metastases and right iliac lymph nodes, consistent with radiopeptide therapy, including a hypodense isthmic thyroid nodule. Fine needle ultrasound-guided biopsy of the thyroid nodule was realized. Immunohistochemistry was positive for CD56, chromogranin, and synaptophysin and negative for calcitonin, confirming neuroendocrine tumor intrathyroid metastasis. Lu-DOTATATE SPECT/CT showed therapeutic uptake on the thyroid metastasis.

Publication types

  • Case Reports

MeSH terms

  • Female
  • Humans
  • Intestinal Neoplasms / diagnostic imaging*
  • Intestinal Neoplasms / pathology
  • Middle Aged
  • Neuroendocrine Tumors / diagnostic imaging*
  • Neuroendocrine Tumors / pathology
  • Octreotide / analogs & derivatives
  • Organometallic Compounds
  • Positron Emission Tomography Computed Tomography*
  • Radiopharmaceuticals
  • Thyroid Neoplasms / diagnostic imaging*
  • Thyroid Neoplasms / secondary

Substances

  • 68Ga-DOTANOC
  • Organometallic Compounds
  • Radiopharmaceuticals
  • lutetium Lu 177 dotatate
  • Octreotide