Cancer Research and Treatment

Original Articles

Pancreatic High-Grade Neuroendocrine Neoplasms in the Korean Population: A Multicenter Study: Haeryoung Kim, Soyeon An, Kyoungbun Lee, Sangjeong Ahn, Do Youn Park, Jo-Heon Kim, Dong-Wook Kang, Min-Ju Kim, Mee Soo Chang, Eun Sun Jung, Joon Mee Kim, Yoon Jung Choi, So-Young Jin, Hee Kyung Chang, Mee-Yon Cho, Yun Kyung Kang, Myunghee Kang, Soomin Ahn, Youn Wha Kim, Seung-Mo Hong, on behalf of the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists; Cancer Res Treat. 2020;52(1):263-276. Published online July 12, 2019; DOI: https://doi.org/10.4143/crt.2019.192

Abstract PDF Supplementary Material PubReader ePub

Purpose
The most recent 2017 World Health Organization (WHO) classification of pancreatic neuroendocrine neoplasms (PanNENs) has refined the three-tiered 2010 scheme by separating grade 3 pancreatic neuroendocrine tumors (G3 PanNETs) from poorly differentiated pancreatic neuroendocrine carcinomas (PanNECs). However, differentiating between G3 Pan- NETs and PanNECs is difficult in clinical practice.
Materials and Methods
Eighty-two surgically resected PanNENs were collected from 16 institutions and reclassified according to the 2017 WHO classification based on the histological features and proliferation index (mitosis and Ki-67). Immunohistochemical stains for ATRX, DAXX, retinoblastoma, p53, Smad4, p16, and MUC1 were performed for 15 high-grade PanNENs.
Results
Re-classification resulted in 20 G1 PanNETs (24%), 47 G2 PanNETs (57%), eight G3 well-differentiated PanNETs (10%), and seven poorly differentiated PanNECs (9%). PanNECs showed more frequent diffuse nuclear atypia, solid growth patterns and apoptosis, less frequent organoid growth and regular vascular patterns, and absence of low-grade PanNET components than PanNETs. The Ki-67 index was significantly higher in PanNEC (58.2%± 15.1%) compared to G3 PanNET (22.6%±6.1%, p < 0.001). Abnormal expression of any two of p53, p16, MUC1, and Smad4 could discriminate PanNECs from G3 PanNETs with 100% specificity and 87.5% sensitivity.
Conclusion
Histological features supporting the diagnosis of PanNECs over G3 PanNETs were the absence of a low-grade PanNET component in the tumor, the presence of diffuse marked nuclear atypia, solid growth pattern, frequent apoptosis and markedly increased proliferative activity with homogeneous Ki-67 labeling. Immunohistochemical stains for p53, p16, MUC1, and Smad4 may be helpful in distinguishing PanNECs from G3 PanNETs in histologically ambiguous cases, especially in diagnostic practice when only small biopsied tissues are available.

Citations

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Building a diagnostic scoring system for high-grade neuroendocrine neoplasms of the pancreas
Yuko Kinowaki, Charlotte Wang, Yuki Fukumura, Maria Ganci, M Lisa Zhang, Masanori Kobayashi, Keiichi Akahoshi, Atsushi Kudo, Keiichi Kinowaki, Keita Kai, Yumi Mihara, Ayumi Murakami, Hung Ngoc Nguyen, Ryoichi Hanazawa, Akihiro Hirakawa, Liang Minggao, Mor
Am J Clin Pathol.2026;[Epub] CrossRef
Treatment status, survival and gene expression analysis of large-cell neuroendocrine lung carcinoma: a real-world study in China
Fei Qi, Minghang Zhang, Yi Han, Juan Du, Hongjie Yang, Hongmei Zhang, Yong Zhang, Tongmei Zhang
Therapeutic Advances in Medical Oncology.2025;[Epub] CrossRef
Pancreatic neuroendocrine neoplasms (pNENs): Genetic and environmental biomarkers for risk of occurrence and prognosis
Matteo Tacelli, Manuel Gentiluomo, Paolo Biamonte, Justo P. Castano, Maja Cigrovski Berković, Mauro Cives, Sanja Kapitanović, Ilaria Marinoni, Sonja Marinovic, Ilias Nikas, Lenka Nosáková, Sergio Pedraza-Arevalo, Eleonora Pellè, Aurel Perren, Jonathan Str
Seminars in Cancer Biology.2025; 112: 112. CrossRef
Differentiation between G3 pancreatic neuroendocrine tumor and pancreatic neuroendocrine carcinoma based on intratumor and peritumor CT value ratio and abnormal vascular network
Chaoyang Zhang, Wei Hao
Frontiers in Oncology.2025;[Epub] CrossRef
Malignant potential of neuroendocrine microtumor of the pancreas harboring high-grade transformation: lesson learned from a patient with von Hippel-Lindau syndrome
Jongwon Lee, Kyung Jin Lee, Dae Wook Hwang, Seung-Mo Hong
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CD56 Expression Is Associated with Biological Behavior of Pancreatic Neuroendocrine Neoplasms

Xin Chen, Chuangen Guo, Wenjing Cui, Ke Sun, Zhongqiu Wang, Xiao Chen
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Prognostic and predictive factors on overall survival and surgical outcomes in pancreatic neuroendocrine tumors: recent advances and controversies
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FOXO1 Suppression is a Determinant of Acquired Lapatinib-Resistance in HER2-Positive Gastric Cancer Cells Through MET Upregulation: Jinju Park, Yiseul Choi, Young San Ko, Younghoon Kim, Jung-Soo Pyo, Bo Gun Jang, Min A Kim, Jae-Seon Lee, Mee Soo Chang, Jong-Wan Park, Byung Lan Lee; Cancer Res Treat. 2018;50(1):239-254. Published online March 24, 2017; DOI: https://doi.org/10.4143/crt.2016.580

Abstract PDF PubReader ePub

Purpose
Lapatinib is a candidate drug for treatment of trastuzumab-resistant, human epidermal growth factor receptor 2 (HER2)–positive gastric cancer (GC). Unfortunately, lapatinib resistance renders this drug ineffective. The present study investigated the implication of forkhead box O1 (FOXO1) signaling in the acquired lapatinib resistance in HER2-positive GC cells.
Materials and Methods
Lapatinib-resistant GC cell lines (SNU-216 LR2-8) were generated in vitro by chronic exposure of lapatinib-sensitive, HER2-positive SNU-216 cells to lapatinib. SNU-216 LR cells with FOXO1 overexpression were generated by stable transfection of a constitutively active FOXO1 mutant (FOXO1A3). HER2 and MET in SNU-216 LR cells were downregulated using RNA interference. The sensitivity of GC cells to lapatinib and/or cisplatin was determined by crystal violet assay. In addition, Western blot analysis, luciferase reporter assay and reverse transcription–polymerase chain reaction were performed.
Results
SNU-216 LR cells showed upregulations of HER2 and MET, but downregulation of FOXO1 compared to parental SNU-216 cells. FOXO1 overexpression in SNU-216 LR cells significantly suppressed resistance to lapatinib and/or cisplatin. In addition, FOXO1 negatively controlled HER2 and MET at the transcriptional level and was negatively controlled by these molecules at the post-transcriptional level. A positive crosstalk was shown between HER2 and MET, each of which increased resistance to lapatinib and/or cisplatin.
Conclusion
FOXO1 serves as an important linker between HER2 and MET signaling pathways through negative crosstalks and is a key regulator of the acquired lapatinib resistance in HER2-positive GC cells. These findings provide a rationale for establishing a novel treatment strategy to overcome lapatinib resistance in a subtype of GC patients.

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Review Article

Epstein-Barr Virus in Human Malignancy: A Special Reference to Epstein-Barr Virus associated Gastric Carcinoma: Mee Soo Chang, Woo Ho Kim; Cancer Res Treat. 2005;37(5):257-267. Published online October 31, 2005; DOI: https://doi.org/10.4143/crt.2005.37.5.257

Abstract PDF PubReader ePub

Epstein-Bar virus (EBV), a human herpesvirus, establishes a life-long persistent infection in 90~95% of human adult population worldwide. EBV is the etiologic agent of infectious mononucleosis, and EBV is associated with a variety of human malignancy including lymphoma and gastric carcinoma. Recently, EBV has been classified as group 1 carcinogen by the WHO International Agency for Research on Cancer. Evidence is presented which suggests that failures of the EBV-specific immunity may play a role in the pathogenesis of EBV-associated malignancy. At present, the precise mechanisms by which EBV transforms B lymphocytes have been disclosed. Encouragingly, they have had enough success so far to keep them enthusiastic about novel therapeutic trial in the field of EBV-associated lymphoma. However, information on EBV-associated gastric carcinoma is still at dawn. This article reviews EBV biology, immunological response of EBV infection, unique oncogenic property of EBV, peculiarity of EBV-associated gastric carcinoma, and lastly, EBV-targeted therapy and vaccination.

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Original Article

Prognostic Significance of CD24 Expression in Gastric Carcinoma: Nevine S. Darwish, Min A Kim, Mee Soo Chang, Hye Seung Lee, Byung Lan Lee, Yong Il Kim, Woo Ho Kim; Cancer Res Treat. 2004;36(5):298-302. Published online October 30, 2004; DOI: https://doi.org/10.4143/crt.2004.36.5.298

Abstract PDF PubReader ePub

Purpose

The human CD24 antigen is a small heavily glycosylated cell surface protein, which is expressed in hematological malignancies, as well as in a large variety of solid tumors. Its expression is now known to be related to the prognosis of several kinds of tumors. This study is designed to examine the prognostic significance of CD24 in Korean gastric cancer patients.

Materials and Methods

In the present study, we examined CD24 expression in 300 consecutive cases of gastric carcinoma by immunohistochemical staining using the tissue-array method. We also investigated the clinicopathological profiles related to CD24 expression.

Results

One hundred and three cases out of 300 (34.3%) showed the positive expression of CD24. The altered expression of CD24 was significantly associated with differentiated cancer (p=0.003), the intestinal subtype according to the Lauren classification (p<0.001), the advanced stage cancer (p=0.027), with lymphatic invasion (p=0.038) and with vascular invasion (p=0.006). The survival analysis revealed that the patients with CD24 positive expression showed significantly poorer survival than those without CD24 expression. Moreover, a combined evaluation revealed that PTEN+/CD24- cases showed the best survival compared to other groups (p=0.01).

Conclusion

Positive CD24 expression occurs in a subset of gastric carcinomas and it correlates significantly with lymphatic invasion, blood vessel invasion and poor survival.

Citations

Citations to this article as recorded by

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