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Research ArticleTeaching Case Studies

Identification of Wandering Masses and Tumor Heterogeneity on 68Ga-DOTATATE and 18F-FDG PET/CT in Metastatic Grade II Neuroendocrine Tumor with Increased Somatostatin Receptor Expression After Combined Chemotherapy and PRRT

Parth Baberwal, Rahul Parghane and Sandip Basu
Journal of Nuclear Medicine Technology September 2024, 52 (3) 272-273; DOI: https://doi.org/10.2967/jnmt.123.267286
Parth Baberwal
Radiation Medicine Centre, Bhabha Atomic Research Centre, Tata Memorial Hospital Annexe, Mumbai, India, and Homi Bhabha National Institute, Mumbai, India
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Rahul Parghane
Radiation Medicine Centre, Bhabha Atomic Research Centre, Tata Memorial Hospital Annexe, Mumbai, India, and Homi Bhabha National Institute, Mumbai, India
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Sandip Basu
Radiation Medicine Centre, Bhabha Atomic Research Centre, Tata Memorial Hospital Annexe, Mumbai, India, and Homi Bhabha National Institute, Mumbai, India
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Abstract

Neuroendocrine tumors (NETs) may manifest as large masses in the abdominopelvic region that exhibit mobility and shifting, potentially leading to diagnostic uncertainty both before and after treatment. A meticulous analysis of PET/CT scans is advantageous in accurately identifying the precise location of large abdominopelvic masses. Tumor heterogeneity may be present in NETs with large abdominopelvic masses and may be easily identified on dual-tracer (68Ga-DOTATATE and 18F-FDG) PET/CT scans. In this scenario, the combined use of chemotherapy and peptide receptor radionuclide therapy is a more effective treatment option than monotherapy. Here, we present a case of a NET with wandering, large, heterogeneous masses in the abdominopelvic regions that were identified using dual-tracer PET/CT. After the administration of temozolomide chemotherapy in a combined chemotherapy–peptide receptor radionuclide therapy approach, we observed an upregulation in the expression of somatostatin receptor in the abdominopelvic masses.

  • neuroendocrine tumor
  • 68Ga-DOTATATE
  • 18F-FDG
  • PET/CT
  • somatostatin receptor
  • peptide receptor radionuclide therapy

Footnotes

  • Published online Mar. 12, 2024.

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Journal of Nuclear Medicine Technology: 52 (3)
Journal of Nuclear Medicine Technology
Vol. 52, Issue 3
September 1, 2024
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Identification of Wandering Masses and Tumor Heterogeneity on 68Ga-DOTATATE and 18F-FDG PET/CT in Metastatic Grade II Neuroendocrine Tumor with Increased Somatostatin Receptor Expression After Combined Chemotherapy and PRRT
Parth Baberwal, Rahul Parghane, Sandip Basu
Journal of Nuclear Medicine Technology Sep 2024, 52 (3) 272-273; DOI: 10.2967/jnmt.123.267286
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Keywords

  • neuroendocrine tumor
  • 68Ga-DOTATATE
  • 18F-FDG
  • PET/CT
  • somatostatin receptor
  • Peptide Receptor Radionuclide Therapy
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Identification of Wandering Masses and Tumor Heterogeneity on 68Ga-DOTATATE and 18F-FDG PET/CT in Metastatic Grade II Neuroendocrine Tumor with Increased Somatostatin Receptor Expression After Combined Chemotherapy and PRRT
Parth Baberwal, Rahul Parghane, Sandip Basu
Journal of Nuclear Medicine Technology Sep 2024, 52 (3) 272-273; DOI: 10.2967/jnmt.123.267286

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