Regional PET/CT after water gastric inflation for evaluating loco-regional disease of gastric cancer

Soo Jin Lee, Won Woo Lee, Hai Jeon Yoon, Ho Young Lee, Kyoung Ho Lee, Young Hoon Kim, Do Joong Park, Hyung Ho Kim, Young So, Sang Eun Kim

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Objective: We aimed to improve diagnostic accuracy of 18F- fluoro-2-deoxyglucose (FDG) PET/CT for gastric cancer with water gastric inflation. Materials and methods: 44 gastric cancer patients (M:F = 30:14, age ± std = 62.1 ± 14.5y) were enrolled before surgery. Fifty minutes after injection of FDG (0.14 mCi/kg body weight), whole body PET/CT was performed first and then regional PET/CT over gastric area was obtained 80 min post FDG injection after water gastric inflation. Diagnostic accuracies for loco-regional lesions were compared between whole body and regional PET/CT. Results: 48 primary tumors (23 EGC and 25 AGC) and 348 LN stations (61 metastatic and 287 benign) in 44 patients were investigated. Primary tumor sensitivity of whole body PET/CT (50% = 24/48) was significantly improved by regional PET/CT (75% = 36/48, p < 0.005). Sensitivity of whole body PET/CT (24.6% = 15/61) for LN metastasis was also significantly improved by regional PET/CT (36.1% = 22/61, p < 0.01), whereas specificity of whole body PET/CT (99.3% = 285/287) was not compromised by regional PET/CT (98.3% = 282/287, p > 0.05). Higher primary tumor FDG uptake in regional PET/CT indicated shorter progress-free survival (p = 0.0003). Conclusion: Diagnostic accuracy of whole body PET/CT for loco-regional disease of gastric cancer could be significantly improved by regional PET/CT after water gastric inflation and prognosis could be effectively predicted by primary tumor FDG uptake in regional PET/CT.

Original languageEnglish
Pages (from-to)935-942
Number of pages8
JournalEuropean Journal of Radiology
Volume82
Issue number6
DOIs
StatePublished - Jun 2013

Bibliographical note

Funding Information:
This study was supported in part by a grant of the Korea Healthcare Technology R&D Project , Ministry of Health and Welfare ( A111627 ), and by grants from the National Research Foundation (NRF) , Ministry of Education, Science and Technology (MEST), ( 2012M2B2A9A02029612 and Basic Science Research Program 2012R1A1A2001060 ), Republic of Korea.

Keywords

  • FDG
  • Gastric cancer
  • PET/CT
  • Staging

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