<sup>18</sup>F-DOPA PET/CT at the Forefront of Initial or Presurgical Evaluation of Small-Intestine Neuroendocrine Tumors - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue J.Nucl.Med. Année : 2022

18F-DOPA PET/CT at the Forefront of Initial or Presurgical Evaluation of Small-Intestine Neuroendocrine Tumors

Eric Ouvrard
  • Fonction : Auteur
Louis de Mestier
  • Fonction : Auteur
Caroline Boursier
  • Fonction : Auteur
Boumediene Lachachi
  • Fonction : Auteur
Nicolas Sahakian
  • Fonction : Auteur
Elodie Chevalier
  • Fonction : Auteur
Nidaa Mikail
  • Fonction : Auteur
Josefina Carullo
  • Fonction : Auteur
Aurélie Bando-Delaunay
  • Fonction : Auteur
Thomas Walter
Gabriel G. Malouf
  • Fonction : Auteur
Pietro Addeo
  • Fonction : Auteur
Gilles Poncet
  • Fonction : Auteur
Frederic Sebag
  • Fonction : Auteur
Rachida Lebtahi
  • Fonction : Auteur
Bernard Goichot
  • Fonction : Auteur
David Taïeb
  • Fonction : Auteur

Résumé

Our objective was to compare the respective value of 68Ga-DOTATOC and 18F-DOPA PET/CT for initial staging or presurgical work-up of patients with small-intestine neuroendocrine tumors (SiNETs). Methods: This was a retrospective, multicenter, noninterventional investigation involving 53 non–surgically treated SiNET patients who underwent both 68Ga-DOTATOC and 18F-DOPA PET/CT within a 6-mo interval without surgical intervention or therapeutic change between the 2 PET/CT studies. Percentage detection rate was calculated according to per-region and per-lesion analyses. Sensitivity for primary tumor detection was assessed in 37 surgically treated patients, taking surgical results (76 SiNETs) as the diagnostic gold standard. Results: 68Ga-DOTATOC PET/CT and 18F-DOPA PET/CT individually identified at least 1 primary SiNET in 92% (34/37) of the patients. Intestinal tumor multifocality was confirmed by histology in 8 patients. 68Ga-DOTATOC and 18F-DOPA PET/CT were concordantly positive for tumor multifocality in 5 patients, discordantly positive in 2 patients, and concordantly negative in 1 patient. The detection rate for subdiaphragmatic nodal metastases on per-region–based analysis was 91% and 98% for 68Ga-DOTATOC and 18F-DOPA PET/CT, respectively (P = 0.18). 18F-DOPA PET/CT detected a higher number of abnormal subdiaphragmatic nodes (P = 0.009). Regarding mesenteric nodes only, 18F-DOPA PET/CT detected more positive regions (P = 0.005) and nodal lesions (P = 0.003) than 68Ga-DOTATOC PET/CT, including nodes at the origin of mesenteric vessels. For detection of distant metastases, 68Ga-DOTATOC and 18F-DOPA PET/CT performed equally well on a per-region–based analysis. As compared with 68Ga-DOTATOC, 18F-DOPA PET/CT detected more hepatic (P < 0.001), peritoneal (P < 0.001), and lung metastases (P < 0.001). Conclusion: 18F-DOPA PET/CT detected more lesions than 68Ga-DOTATOC PET/CT in the studied patients. The respective roles of the two should be discussed in terms of disease staging and treatment selection.

Dates et versions

hal-03954228 , version 1 (24-01-2023)

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Eric Ouvrard, Louis de Mestier, Caroline Boursier, Boumediene Lachachi, Nicolas Sahakian, et al.. 18F-DOPA PET/CT at the Forefront of Initial or Presurgical Evaluation of Small-Intestine Neuroendocrine Tumors. J.Nucl.Med., 2022, 63 (12), pp.1865-1870. ⟨10.2967/jnumed.122.263984⟩. ⟨hal-03954228⟩
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