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Journal of Medical Oncology and Therapeutics | Volume: 3
July 23-25, 2018 | Moscow, Russia
12th World Cancer Congress
Diagnostic accuracy of incidental focal colonic uptake on 18F-FDG PET/CT in patients with non-
abdominal Cancers
Yusuf Gunay, Emrah Caglar and Rabiye Uslu Erdemir
Bulent Ecevit University, Turkey
An imaging modality 18 F-FDG PET/CT has been gaining
popularity in screening and staging of malignant diseases.
Meanwhile, incidental colonic focal lesions can be identified on
PET/CT in patients who undergo PET/CT for other reasons than
expected colon diseases. The aim of this study was to evaluate
the accuracy of incidentally detected colonic lesions on PET/
CT and to correlate with colonoscopy and histopathological
findings.
Patients those who underwent PET/CT for non-abdominal
cancer work-up with incidentally identified focal colorectal
radiotracer activity on PET/CT were included to study . Patients
with known colorectal cancers were excluded. Colonoscopy
was performed in all patients with this incidental finding in
order to exclude colonic malignancy. Maximum standardized
uptake value (SUVmax), CT findings, colonoscopy findings
and histopathological results were analyzed in all patients.
True positive lesions were considered as colorectal cancer,
adenomatosus adenomas and hyperplastic polyps.
Focal PET/CT colorectal activity was incidentally detected in
49 patients with no previous history of colorectal cancer. Of
the 49 patients, 35 (71,4%) colonoscopies were performed.
Based on pathological findings, fourteen patients (40 %)
had adenomatous polyps, 7 (20%) had hyperplastic polyps,
5 (14,3%) had adenocarcinoma. Nine patients (25,7%) had
normal colonoscopic examination. The reason for PET/CT
was done as follows: Bronchopulmonary cancer 27 (55.1%),
breast cancer 11 (22.4%), larynx cancer 7 (14.3%) and 4 (8.2%)
miscellaneous non-abdominal cancers. The average SUVmax
values of adenocancers and adenomatous /hyperplastic polyps
were 13.5 and 6.11. The average size of adenocancer and polyps
were 21m and 7.2 mm repectively.
Based on this study, we recommend to do colonoscopy and
histological analysis in all patients with unexpected focal
FDG activity found in colon during a PET/CT examination for
unrelated reasons.
Speaker Biography
Yusuf Gunay graduated from Ankara University medical school in 1999 and then
completed a general surgery residency at Ankara Numune Hospital, Ankara, Turkey.
He then completed his first abdominal transplant surgery fellowship at The Ohio State
University in 2010 and followed by MIS fellowship at University of Iowa in 2011 and the
second Abdominal Transplant Surgery fellowship at University of Pittsburgh Medical
Center in June 2017. Currently, he is an assistant professor at Bulent Ecevit University,
Zonguldak, Turkey. He has many publications mainly in abdominal transplant surgery.
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