Münch, S.* ; Marr, L.* ; Feuerecker, B.* ; Dapper, H.* ; Braren, R.* ; Combs, S.E. ; Duma, M.N.*
Impact of F-18-FDG-PET/CT on the identification of regional lymph node metastases and delineation of the primary tumor in esophageal squamous cell carcinoma patients.
Strahlenther. Onkol. 196, 787-794 (2020)
Purpose In patients undergoing chemoradiation for esophageal squamous cell carcinoma (ESCC), the extent of elective nodal irradiation (ENI) is still discussed controversially. This study aimed to analyze patterns of lymph node metastases and their correlation with the primary tumor using F-18-fludeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) scans. Methods 102 ESCC patients with pre-treatment FDG-PET/CT scans were evaluated retrospectively. After exclusion of patients with low FDG uptake and patients without FDG-PET-positive lymph node metastases (LNM), 76 patients were included in the final analysis. All LNM were assigned to 16 pre-defined anatomical regions and classified according to their position relative to the primary tumor (above, at the same height, or below the primary tumor). In addition, the longitudinal distance to the primary tumor was measured for all LNM above or below the primary tumor. The craniocaudal extent (i.e., length) of the primary tumor was measured using FDG-PET imaging (L-PET) and also based on all other available clinical and imaging data (endoscopy, computed tomography, biopsy results) except FDG-PET (L-CT/EUS). Results Significantly more LNM were identified with F-18-FDG-PET/CT (177 LNM) compared to CT alone (131 LNM, p & x202f;< 0.001). The most common sites of LNM were paraesophageal (63% of patients, 37% of LNM) and paratracheal (33% of patients, 20% of LNM), while less than 5% of patients had supraclavicular, subaortic, diaphragmatic, or hilar LNM. With regard to the primary tumor, 51% of LNM were at the same height, while 25% and 24% of lymph node metastases were above and below the primary tumor, respectively. For thirty-three LNM (19%), the distance to the primary tumor was larger than 4 & x202f;cm. No significant difference was seen between L-CT/EUS (median 6 & x202f;cm) and L-PET (median 6 & x202f;cm, p & x202f;= 0.846) Conclusion F-18-FDG-PET can help to identify subclinical lymph node metastases which are located outside of recommended radiation fields. PET-based involved-field irradiation might be the ideal compromise between small treatment volumes and decreasing the risk of undertreatment of subclinical metastatic lymph nodes and should be further evaluated.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Chemoradiation ; Computed Tomography ; Involved-field ; Pet-based ; Pattern Of Lymph Node Metastases; Positron-emission-tomography; Phase-iii Trial; Fdg-pet; Neoadjuvant Chemoradiotherapy; Cancer; Radiotherapy; Ct; Therapy; Surgery
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2020
Prepublished im Jahr
HGF-Berichtsjahr
2020
ISSN (print) / ISBN
0179-7158
e-ISSN
1439-099X
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 196,
Heft: 9,
Seiten: 787-794
Artikelnummer: ,
Supplement: ,
Reihe
Verlag
Urban & Vogel
Verlagsort
Tiergartenstrasse 17, D-69121 Heidelberg, Germany
Tag d. mündl. Prüfung
0000-00-00
Betreuer
Gutachter
Prüfer
Topic
Hochschule
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Veröffentlichungsdatum
0000-00-00
Anmeldedatum
0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
POF Topic(s)
30203 - Molecular Targets and Therapies
Forschungsfeld(er)
Radiation Sciences
PSP-Element(e)
G-501300-001
Förderungen
Copyright
Erfassungsdatum
2020-05-28