Abstract
Background
Lymph node (LN) metastasis is significantly associated with worse prognosis for patients with intrahepatic cholangiocarcinoma (ICC). Improvement in preoperative assessment on LN metastasis helps in treatment decision-making. We aimed to investigate the role of radiomics-based method in predicting LN metastasis for patients with ICC.
Methods
A total of 296 patients with ICC who underwent curative-intent hepatectomy and lymphadenectomy at two centers in China were analyzed. Radiomic features, including histogram- and wavelet-based features, shape and size features, and texture features were extracted from four-phase computerized tomography (CT) images. The clinical and conventional radiological variables which were independently associated with LN metastasis were also identified. A combined nomogram predicting LN metastasis was developed, and its performance was determined by discrimination, calibration, and stratification of long-term prognosis. The results were validated by the internal and external validation cohorts.
Results
Twenty-four radiomic features were selected into the nomogram. The established nomogram demonstrated good discrimination and calibration, with areas under the curve (AUCs) of 0.98 [95% confidence interval (CI) 0.96–0.99], 0.93 (0.88–0.98), and 0.89 (0.81–0.96) in the training and two validation cohorts, respectively. The 5-year overall survival (OS) and recurrence-free survival (RFS) rates of patients with high risk of LN metastasis as grouped by nomogram were poorer than those of patients with low risk in the training cohort (OS 28.8% versus 53.9%, p < 0.001; RFS 26.3% versus 44.2%, p = 0.001). Similar results were observed in the two validation cohorts.
Conclusions
Radiomics-based method provided accurate prediction of LN metastasis and prognostic assessment for ICC patients, and might aid the preoperative surgical decision.
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Disclosure
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Funding
This study was supported by grants from National Natural Science Foundation of China (81772531 for J.L., 62027901 for J.T., 82102140 for S.Z., and 81930053 for J.W.), Program of Shanghai Academic/Technology Research Leader (19XD1425000 for J.L.), Program of Shanghai for Key Clinical Disciplines Construction (shslczdzk02402 for F.S.), Program of Shanghai for Medical Guide (18411968900 for J.L.), and Program of Shanghai for Clinical Skill Training and Clinical Practice Innovations (SHDC2020CR4027 for J.L., SHDC2020CR5007 and SHDC12019110 for F.S.).
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Zhang, S., Huang, S., He, W. et al. Radiomics-Based Preoperative Prediction of Lymph Node Metastasis in Intrahepatic Cholangiocarcinoma Using Contrast-Enhanced Computed Tomography. Ann Surg Oncol 29, 6786–6799 (2022). https://doi.org/10.1245/s10434-022-12028-8
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DOI: https://doi.org/10.1245/s10434-022-12028-8