Clinical Etiology of Hypermetabolic Pelvic Lesions in Postoperative Positron Emission Tomography/Computed Tomography for Patients With Rectal and Sigmoid Cancer.
- Author:
Yun Hee KANG
1
;
Eunji HAN
;
Geon PARK
Author Information
- Publication Type:Original Article
- Keywords: Colorectal neoplasms; Fluorodeoxyglucose F18; Local neoplasm recurrence; Positron-emission tomography
- MeSH: Abscess; Carcinoma; Colon, Sigmoid*; Colorectal Neoplasms; Electrons*; Female; Fistula; Fluorodeoxyglucose F18; Humans; Lost to Follow-Up; Lymph Nodes; Neoplasm Recurrence, Local; Ovary; Positron-Emission Tomography; Positron-Emission Tomography and Computed Tomography; Recurrence; Retrospective Studies; Sigmoid Neoplasms*; Tomography, X-Ray Computed
- From:Annals of Coloproctology 2018;34(2):78-82
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: The purpose of this study was to present various clinical etiologies of hypermetabolic pelvic lesions on postoperative positron emission tomography/computed tomography (PET/CT) images for patients with rectal and sigmoid cancer. METHODS: Postoperative PET/CT images for patients with rectal and sigmoid cancer were retrospectively reviewed to identify hypermetabolic pelvic lesions. Positive findings were detected in 70 PET/CT images from 45 patients; 2 patients who were lost to follow-up were excluded. All PET findings were analyzed in comparison with contrast-enhanced CT. RESULTS: A total of 43 patients were classified into 2 groups: patients with a malignancy including local recurrence (n = 30) and patients with other benign lesions (n = 13). Malignant lesions such as a local recurrent tumor, peritoneal carcinomatosis, and incidental uterine malignancy, as well as various benign lesions such as an anastomotic sinus, fistula, abscess, reactive lymph node, and normal ovary, were observed. CONCLUSION: PET/CT performed during postoperative surveillance of rectal and sigmoid colon cancer showed increased fluorodeoxyglucose uptake not only in local recurrence, but also in benign pelvic etiologies. Therefore, physicians need to be cautious about the broad clinical spectrum of hypermetabolic pelvic lesions when interpreting images.
