TY - JOUR
T1 - Shape and Enhancement Characteristics of Pancreatic Neuroendocrine Tumor on Preoperative Contrast-enhanced Computed Tomography May be Prognostic Indicators
AU - Okabe, Hirohisa
AU - Hashimoto, Daisuke
AU - Chikamoto, Akira
AU - Yoshida, Morikatsu
AU - Taki, Katsunobu
AU - Arima, Kota
AU - Imai, Katsunori
AU - Tamura, Yoshitaka
AU - Ikeda, Osamu
AU - Ishiko, Takatoshi
AU - Uchiyama, Hideaki
AU - Ikegami, Toru
AU - Harimoto, Norifumi
AU - Itoh, Shinji
AU - Yamashita, Yo ichi
AU - Yoshizumi, Tomoharu
AU - Beppu, Toru
AU - Yamashita, Yasuyuki
AU - Baba, Hideo
AU - Maehara, Yoshihiko
N1 - Publisher Copyright:
© 2016, Society of Surgical Oncology.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - Background: Prognostic indicators of the malignant potential of pancreatic neuroendocrine tumors (PNET) are limited. We assessed tumor shape and enhancement pattern on contrast-enhanced computed tomography as predictors of malignant potential. Methods: Sixty cases of PNET patients undergoing curative surgery from 2001 to 2014 were enrolled onto our retrospective study. Preoperative enhanced CTs were assessed, and criteria defined for regularly shaped and enhancing tumors (group 1), and irregularly shaped and/or enhancing tumors (group 2). The relation of tumor shape and enhancement pattern to outcome was assessed. Results: Interobserver agreement was substantial (kappa = 0.74). Group 2 (n = 24) was significantly correlated with synchronous liver metastasis (23 vs. 0 %), lymph node metastasis (36 vs. 3 %), pathologic capsular invasion (68 vs. 8 %), larger tumor size (30 vs. 12 mm), tumor, node, metastasis classification system (TNM) stage III/IV disease (46 vs. 3 %), and histologic grade 2/3 (41 vs. 0 %). Multivariate analysis revealed that tumor grade 2/3 and group 2 criteria correlated with tumor relapse (hazard ratio 6.5 and 13.6, P = 0.0071 and 0.039, respectively), and that only group 2 criteria were independently correlated with poor overall survival (hazard ratio 5.56e + 9, P = 0.0041). Conclusions: Irregular tumor shape/enhancement on preoperative computed tomography is a negative prognostic factor after curative surgery for PNET.
AB - Background: Prognostic indicators of the malignant potential of pancreatic neuroendocrine tumors (PNET) are limited. We assessed tumor shape and enhancement pattern on contrast-enhanced computed tomography as predictors of malignant potential. Methods: Sixty cases of PNET patients undergoing curative surgery from 2001 to 2014 were enrolled onto our retrospective study. Preoperative enhanced CTs were assessed, and criteria defined for regularly shaped and enhancing tumors (group 1), and irregularly shaped and/or enhancing tumors (group 2). The relation of tumor shape and enhancement pattern to outcome was assessed. Results: Interobserver agreement was substantial (kappa = 0.74). Group 2 (n = 24) was significantly correlated with synchronous liver metastasis (23 vs. 0 %), lymph node metastasis (36 vs. 3 %), pathologic capsular invasion (68 vs. 8 %), larger tumor size (30 vs. 12 mm), tumor, node, metastasis classification system (TNM) stage III/IV disease (46 vs. 3 %), and histologic grade 2/3 (41 vs. 0 %). Multivariate analysis revealed that tumor grade 2/3 and group 2 criteria correlated with tumor relapse (hazard ratio 6.5 and 13.6, P = 0.0071 and 0.039, respectively), and that only group 2 criteria were independently correlated with poor overall survival (hazard ratio 5.56e + 9, P = 0.0041). Conclusions: Irregular tumor shape/enhancement on preoperative computed tomography is a negative prognostic factor after curative surgery for PNET.
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U2 - 10.1245/s10434-016-5630-4
DO - 10.1245/s10434-016-5630-4
M3 - Article
C2 - 27896509
AN - SCOPUS:84997703737
VL - 24
SP - 1399
EP - 1405
JO - Annals of Surgical Oncology
JF - Annals of Surgical Oncology
SN - 1068-9265
IS - 5
ER -