Prognostic value of metabolic parameters on 18F-fluorodeoxyglucose positron tomography/computed tomography in classical rectal adenocarcinoma

• Published in: Scientific reports Vol. 11; no. 1; p. 12947
• Main Authors: Choi, Byung Wook, Kang, Sungmin, Bae, Sung Uk, Jeong, Woon Kyung, Baek, Seong Kyu, Song, Bong-Il, Won, Kyoung Sook, Kim, Hae Won
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 21.06.2021; Nature Publishing Group; Nature Portfolio
• Subjects: 692/4017; 692/4020; 692/4028; 692/499; 692/53; Adenocarcinoma; Calcium channels; Carcinoembryonic antigen; Colorectal cancer; Computed tomography; Glycolysis; Humanities and Social Sciences; Lymph nodes; Medical prognosis; Metabolism; Metastases; Metastasis; multidisciplinary; Multivariate analysis; Positron emission tomography; Rectum; Risk factors; Science; Science (multidisciplinary); Survival; Tomography; Tumors
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-021-92118-x

We aimed to investigate the prognostic value of the metabolic parameters of 18 F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) in classical rectal adenocarcinoma (CRAC). We retrospectively reviewed 149 patients with CRAC who underwent preoperative 18 F-FDG PET/CT at initial diagnosis followed by curative surgical resection. 18 F-FDG PET/CT metabolic parameters including maximum standardized uptake value (SUVmax), metabolic tumour volume (MTV), and total lesion glycolysis (TLG) for disease-free survival (DFS) and overall survival (OS) were evaluated for prognostic significance by univariate and multivariate analyses, along with conventional risk factors including pathologic T (pT) stage, lymph node (LN) metastasis, lymphovascular invasion (LVI), perineural invasion (PNI), and preoperative carcinoembryonic antigen (CEA) level. On univariate analysis, high pT stage, positive LN metastasis, LVI, PNI, MTV, and TLG were significant prognostic factors affecting DFS (all P  < 0.05), while CEA level, high pT stage, positive LN metastasis, LVI, PNI, MTV, and TLG affected OS (all P  < 0.05). On multivariate analysis, positive LN metastasis, LVI, MTV, and TLG were independent prognostic factors affecting DFS (all P  < 0.05), while CEA level, positive LN metastasis, and MTV affected OS (all P  < 0.05). Thus, the volume-based metabolic parameters from preoperative 18 F-FDG PET/CT scans are independent prognostic factors in patients with CRAC.