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3 "Hee Mang Yoon"
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Original Articles
Malignant Hepatocellular Neoplasm, Not Otherwise Specified, Displays Poorer Chemoresponsiveness and Postoperative Prognosis Than Hepatoblastoma
In Hye Song, Sujin Gang, Hee Mang Yoon, Pyeong Hwa Kim, Bokyung Ahn, Jihun Kim, Deok Hoon Kim, Jung-Man Namgoong, Kyung-Nam Koh
Received February 1, 2025  Accepted May 9, 2025  Published online May 12, 2025  
DOI: https://doi.org/10.4143/crt.2025.117    [Epub ahead of print]
AbstractAbstract PDFSupplementary Material
Purpose
Malignant hepatocellular neoplasm, not otherwise specified (HCN-NOS) is a provisional diagnostic entity, characterised by intermediate or a combination of hepatoblastoma and pediatric hepatocellular carcinoma (p-HCC) features. We compared the characteristics of HCN-NOS with hepatoblastoma and p-HCC.
Materials and Methods
The records of 148 pediatric patients diagnosed with hepatocellular malignancy after resection were retrieved from the institutional database. Clinical parameters and histopathology slides were reviewed to re-establish each patient’s diagnosis. Molecular analyses were conducted in 37 patients.
Results
Patients were profiled as 21 (14.2%) with HCN-NOS, 109 (73.6%) with hepatoblastoma, and 18 (12.2%) with p-HCC. The median age was 8.6 years in HCN-NOS, 1.2 years in hepatoblastoma, and 7.9 years in p-HCC. Background liver disease was frequently observed in p-HCC (11/18, 61%) but infrequent in HCN-NOS (4/21, 19%) and hepatoblastoma (4/109, 3.7%). HCN-NOS presented with a more advanced PRETEXT stage (p=0.012), metastasis (p < 0.001), and lymphovascular invasion (p < 0.001) than hepatoblastoma and p-HCC. Patients with HCN-NOS received longer cycles of preoperative chemotherapy; however, they reported a lower decrease in serum alpha-fetoprotein and tumor size than hepatoblastoma (p=0.043, p=0.004, and p=0.044, respectively). HCN-NOS was an independent poor prognostic factor for event-free survival (hazard ratio, 4.968; 95% confidence interval, 2.004 to 12.32; p < 0.001).
Conclusion
The possibility of HCN-NOS should be considered in pediatric patients with liver cancer, especially those ≥ 5 years old with no background liver disease. Because HCN-NOS exhibits poor chemoresponsiveness and unfavourable postoperative prognosis, liver transplantation should be strongly considered.
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Pediatric cancer
Prognostic Value of POST-Treatment Extent of Tumor (POSTTEXT) System in Patients with Hepatoblastoma
Hana Jeong, Hee Mang Yoon, Pyeong Hwa Kim, Ah Young Jung, Young Ah Cho, Jin Seong Lee, Kyung-Nam Koh, Jung-Man Namgoong
Cancer Res Treat. 2025;57(4):1198-1206.   Published online January 20, 2025
DOI: https://doi.org/10.4143/crt.2024.600
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
This study aimed to assess prognostic values of the POST-Treatment Extent of tumor (POSTTEXT) system and clinical factors after neoadjuvant chemotherapy in hepatoblastoma patients and evaluate benefits of post-treatment imaging and clinical factors concomitant with Children’s Hepatic Tumors International Collaboration–Hepatoblastoma Stratification (CHIC-HS) system.
Materials and Methods
This single-center retrospective study of hepatoblastoma cases (2006-2022) included pediatric patients receiving ≥ 4 cycles of neoadjuvant chemotherapy, with pre- and post-treatment imaging and complete medical records. Clinical data included age, sex, and serum α-fetoprotein (AFP) levels. Cox regression analyses identified predictors of event-free survival (EFS). Time-dependent receiver operating characteristic curves assessed the predictive power of combining the CHIC-HS risk stratification with post-treatment factors. Inter-reader agreement was analyzed using weighted kappa.
Results
Among the 109 hepatoblastoma patients, 73 (mean age, 2.2±2.7 years) met the inclusion criteria. Prognostic factors for EFS included AFP levels after the fourth cycle of neoadjuvant chemotherapy (hazard ratio [HR], 1.233; 95% confidence interval [CI], 1.086 to 1.400; p=0.001), tumor size change ratio (HR, 0.654; 95% CI, 0.448 to 0.955; p=0.030), and POSTTEXT annotation factor M (HR, 5.209; 95% CI, 1.639 to 16.553; p=0.005). Incorporating AFP levels after the fourth cycle of neoadjuvant chemotherapy into the CHIC-HS improved predictive power (p=0.043). POSTTEXT system showed better inter-reader agreement than PRE-Treatment Extent of tumor (PRETEXT).
Conclusion
Predictors of EFS in hepatoblastoma include AFP levels after the fourth cycle of neoadjuvant chemotherapy, tumor size change ratio, and metastasis (POSTTEXT M). Combining AFP levels after the fourth cycle of neoadjuvant chemotherapy to the CHIC-HS improved the predictive ability.
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Children’s Hepatic Tumors International Collaboration-Hepatoblastoma Stratification (CHIC-HS) System for Pediatric Patients with Hepatoblastoma: A Retrospective, Hospital-Based Cohort Study in South Korea
Pyeong Hwa Kim, Hyun Joo Shin, Hee Mang Yoon, Young Hun Choi, Jung-Man Namgoong, Dae Yeon Kim, Kyung-Nam Koh, Mi-Jung Lee, Haesung Yoon, Chuhl Joo Lyu, Jung Woo Han, Seung Min Hahn, Young Ah Cho
Cancer Res Treat. 2022;54(1):253-258.   Published online March 24, 2021
DOI: https://doi.org/10.4143/crt.2021.265
AbstractAbstract PDFPubReaderePub
Purpose
In 2017, the Children’s Hepatic Tumors International Collaboration-Hepatoblastoma Stratification (CHIC-HS) system was introduced. We aimed to evaluate the accuracy of CHIC-HS System for the prediction of event-free survival (EFS) in Korean pediatric patients with hepatoblastoma.
Materials and Methods
This two-center retrospective study included consecutive Korean pediatric patients with histopathologically confirmed hepatoblastoma from March 1988 through September 2019. We compared EFS among four risk groups according to the CHIC-HS system. Discriminatory ability of CHIC-HS system was also evaluated using optimism-corrected C-statistics. Factors associated with EFS were explored using multivariable Cox regression analysis.
Results
We included 129 patients (mean age, 2.6±3.3 years; female:male, 63:66). The 5-year EFS rates in the very low, low, intermediate, and high-risk groups, according to the CHIC-HS system were 90.0%, 82.8%, 73.5%, and 51.3%, respectively. The CHIC-HS system aligned significantly well with EFS outcomes (p=0.004). The optimism-corrected C index of CHIC-HS was 0.644 (95% confidence interval [CI], 0.561 to 0.727). Age ≥ 8 (vs. age ≤ 2; hazard ratio [HR], 2.781; 95% CI, 1.187 to 6.512; p=0.018), PRE-Treatment EXTent of tumor (PRETEXT) stage IV (vs. PRETEXT I or II; HR, 2.774; 95% CI, 1.228 to 5.974; p=0.009), and presence of metastasis (HR, 2.886; 95% CI, 1.457 to 5.719; p=0.002), which are incorporated as the first three nodes in the CHIC-HS system, were independently associated with EFS.
Conclusion
The CHIC-HS system aligned significantly well with EFS outcomes in Korean pediatric patients with hepatoblastoma. Age group, PRETEXT stage, and presence of metastasis were independently associated with EFS.

Citations

Citations to this article as recorded by  
  • The importance of age as a prognostic predictor of childhood hepatoblastoma: an analysis of single-center childhood hepatoblastoma in China
    Zhen Li, Hong Jiang, Yuan-Qi Wang, Wen-Qing Wang, Li-Bin Huang, Jun-Cheng Liu, Hong-Man Xue
    BMC Pediatrics.2025;[Epub]     CrossRef
  • Prognostic prediction of hepatoblastoma in children: development and validation of machine learning models—an SEER-based study
    Jianfeng Luo, Kaikun Huang, Le Zheng, Long Li
    Updates in Surgery.2025;[Epub]     CrossRef
  • Prognostic Value of POST-Treatment Extent of Tumor (POSTTEXT) System in Patients with Hepatoblastoma
    Hana Jeong, Hee Mang Yoon, Pyeong Hwa Kim, Ah Young Jung, Young Ah Cho, Jin Seong Lee, Kyung-Nam Koh, Jung-Man Namgoong
    Cancer Research and Treatment.2025; 57(4): 1198.     CrossRef
  • Elevated serum uric acid is associated with the risk of advanced staging and vascular involvement in patients with hepatoblastoma: a 14-year retrospective study
    Yunlan Zhou, Jinning Li, Yanhui Ma, Mengjie Tang, Xiaojun Yuan, Lisong Shen
    Frontiers in Oncology.2023;[Epub]     CrossRef
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