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Somatostatin Receptor Positron Emission Tomography: Beyond Gastroenteropancreatic Neuroendocrine Tumors

  • Gagandeep Choudhary
  • Samuel GalganoEmail author
Nuclear Medicine & PET/CT Imaging (R Flavell, Section Editor)
  • 30 Downloads

Abstract

Purpose of Review

Similar to various gastroenteropancreatic (GEP) neuroendocrine tumors (NETs), somatostatin receptors (SSTRs) are overexpressed in a wide array of malignant and benign conditions. Using somatostatin positron emission tomography (PET) analogs ([68Ga]DOTA-peptides) this overexpression of SSTRs can be exploited for clinical management in terms of diagnosis, therapy, and for peptide receptor radionuclide therapy (PRRT).

Recent Findings

Recent reports suggest that [68Ga]DOTA-peptide PET tracers have an emerging role in the management of wide array of non-GEP-NETs due to overexpression of SSTRs. The potential role of SSTR-PET imaging in the management of medullary thyroid cancer, paraganglioma, Merkel cell carcinoma, phosphaturic mesenchymal tumors, and inflammation will be discussed. The emerging role of theranostic and personalized medicine with PRRT using peptides labeled with yttrium-90 (90Y) or lutetium-177 (177Lu) beta emitters will also be discussed.

Summary

SSTR-PET imaging with [68Ga]DOTA-peptides has utility in malignant and benign conditions other than GEP-NETs. Combining SSTR-PET with other anatomic and functional imaging modalities has demonstrated superior diagnostic accuracy. The presence of SSTRs in these conditions opens up new possibilities in the management of these conditions in terms of imaging and therapeutics.

Keywords

Somatostatin receptor Medullary thyroid cancer Paraganglioma Inflammation Positron emission tomography (PET) [68Ga]DOTATATE 

Notes

Compliance with Ethical Guidelines

Conflict of interest

Gagandeep Choudhary declares no potential conflicts of interest. Samuel Galgano reports research support from Advanced Accelerator Applications.

Human and Animal Rights

This article does not contain any studies with human or animal subjects performed by any of the authors.

References

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Authors and Affiliations

  1. 1.Division of Molecular Imaging & Therapeutics and Neuroradiology, Department of RadiologyUniversity of Alabama at BirminghamBirminghamUSA
  2. 2.Division of Abdominal Imaging and Molecular Imaging & Therapeutics, Department of RadiologyUniversity of Alabama at BirminghamBirminghamUSA

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