Journal of Pathology and Translational Medicine

Original Articles

P2X₇ Receptor Expression in Coexistence of Papillary Thyroid Carcinoma with Hashimoto's Thyroiditis: Ji Hyun Kwon, Eun Sook Nam, Hyung Sik Shin, Seong Jin Cho, Hye Rim Park, Mi Jung Kwon; Korean J Pathol. 2014;48(1):30-35. Published online February 25, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.1.30

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Background

This study was aimed at investigating the relation of P2X₇ receptor (P2X₇R) expression with the clinicopathological features of papillary thyroid carcinoma (PTC) coexisting with Hashimoto's thyroiditis (HT).

Methods

We examined 170 patients (84, PTC with HT; 86, PTC without HT). P2X₇R expression was examined by immunohistochemical methods. The staining intensity and patterns were evaluated and scored using a semi-quantitative method.

Results

The PTC with HT group was more likely to contain women and had less extrathyroid extension, lymph node (LN) metastasis, lymphovascular invasion, and recurrence than the PTC without HT group. Patients positive for P2X₇R had significantly higher frequencies of lymphovascular invasion, extrathyroid extension, LN metastasis, and absence of HT. As shown by multivariate analysis, the expression of P2X₇R was significantly higher if HT was absent and extrathyroid extension was present. In the PTC with HT group, the expression of P2X₇R was significantly higher in patients with tumor multifocality, lymphovascular invasion, and extrathyroid extension. In the PTC without HT group, the expression of P2X₇R was significantly higher in women and those having tumor multifocality.

Conclusions

Coexistence of PTC with HT is associated with good prognostic factors, and P2X₇R expression in PTC was correlated with poor prognostic factors and the absence of HT.

Citations

Citations to this article as recorded by

Research Progress in the Relationship Between P2X7R and Cervical Cancer
Yiqing Tang, Cuicui Qiao, Qianqian Li, Xiaodi Zhu, Ronglan Zhao, Xiaoxiang Peng
Reproductive Sciences.2023; 30(3): 823. CrossRef
Warthin-like papillary thyroid carcinoma: a case report and comprehensive review of the literature
Abdel Mouhaymen Missaoui, Fatma Hamza, Wafa Belabed, Manel Mellouli, Mohamed Maaloul, Slim Charfi, Issam Jardak, Tahya Sellami-Boudawara, Nabila Rekik, Mohamed Abid
Frontiers in Endocrinology.2023;[Epub] CrossRef
Mapping the path towards novel treatment strategies: a bibliometric analysis of Hashimoto’s thyroiditis research from 1990 to 2023
Manping Guo, Qingna Li, Xingfang Liu, Yiming Wang, Qiaoning Yang, Rui Li, Yang Zhao, Chenfei Li, Song Sheng, Hangkun Ma, Zhenghong Li, Rui Gao
Frontiers in Endocrinology.2023;[Epub] CrossRef
Association between Hashimoto thyroiditis and clinical outcomes of papillary thyroid carcinoma: A meta-analysis
Qizhi Tang, Weiyu Pan, Liangyue Peng, Francis Moore
PLOS ONE.2022; 17(6): e0269995. CrossRef
Hashimoto’s Thyroiditis Minimizes Lymph Node Metastasis in BRAF Mutant Papillary Thyroid Carcinomas
Peter P. Issa, Mahmoud Omar, Yusef Buti, Chad P. Issa, Bert Chabot, Christopher J. Carnabatu, Ruhul Munshi, Mohammad Hussein, Mohamed Aboueisha, Mohamed Shama, Ralph L. Corsetti, Eman Toraih, Emad Kandil
Biomedicines.2022; 10(8): 2051. CrossRef
Overexpression of PD-L1 in Papillary Carcinoma and Its Association with Clinicopathological Variables
Servet KOCAÖZ, Gülay TURAN
Düzce Tıp Fakültesi Dergisi.2021; 23(3): 252. CrossRef
Effect of P2X7 receptor on tumorigenesis and its pharmacological properties
Wen-jun Zhang, Ce-gui Hu, Zheng-ming Zhu, Hong-liang Luo
Biomedicine & Pharmacotherapy.2020; 125: 109844. CrossRef
P2X7 in Cancer: From Molecular Mechanisms to Therapeutics
Romain Lara, Elena Adinolfi, Catherine A. Harwood, Mike Philpott, Julian A. Barden, Francesco Di Virgilio, Shaun McNulty
Frontiers in Pharmacology.2020;[Epub] CrossRef
The P2X7 Receptor in Inflammatory Diseases: Angel or Demon?
Luiz E. B. Savio, Paola de Andrade Mello, Cleide Gonçalves da Silva, Robson Coutinho-Silva
Frontiers in Pharmacology.2018;[Epub] CrossRef
Patients with Oncocytic Variant Papillary Thyroid Carcinoma Have a Similar Prognosis to Matched Classical Papillary Thyroid Carcinoma Controls
Azadeh A. Carr, Tina W.F. Yen, Diana I. Ortiz, Bryan C. Hunt, Gilbert Fareau, Becky L. Massey, Bruce H. Campbell, Kara L. Doffek, Douglas B. Evans, Tracy S. Wang
Thyroid.2018; 28(11): 1462. CrossRef
Extracellular purines, purinergic receptors and tumor growth
F Di Virgilio, E Adinolfi
Oncogene.2017; 36(3): 293. CrossRef
Multifaceted Effects of Extracellular Adenosine Triphosphate and Adenosine in the Tumor–Host Interaction and Therapeutic Perspectives
Paola de Andrade Mello, Robson Coutinho-Silva, Luiz Eduardo Baggio Savio
Frontiers in Immunology.2017;[Epub] CrossRef
Potential role of P2X7R in esophageal squamous cell carcinoma proliferation
André A Santos, Angélica R Cappellari, Fernanda O de Marchi, Marina P Gehring, Aline Zaparte, Caroline A Brandão, Tiago Giuliani Lopes, Vinicius D da Silva, Luis Felipe Ribeiro Pinto, Luiz Eduardo Baggio Savio, Aline Cristina Abreu Moreira-Souza, Robson C
Purinergic Signalling.2017; 13(3): 279. CrossRef
Potential relationship between Hashimoto's thyroiditis and BRAFV600E mutation status in papillary thyroid cancer
Rui‐chao Zeng, Lang‐ping Jin, En‐dong Chen, Si‐yang Dong, Ye‐feng Cai, Guan‐li Huang, Quan Li, Chun Jin, Xiao‐hua Zhang, Ou‐chen Wang
Head & Neck.2016;[Epub] CrossRef
Papillary thyroid carcinoma in Hashimoto’s thyroiditis as an incidental finding
Al Mogrampi Saad, A. Krexi, N. Papoulidis, M. Verroiotou, D. Michalakis, I. Fardellas
Hellenic Journal of Surgery.2016; 88(1): 47. CrossRef
Association of Hashimoto's thyroiditis and thyroid cancer
Salem I. Noureldine, Ralph P. Tufano
Current Opinion in Oncology.2015; 27(1): 21. CrossRef
Cribriform-morular variant of papillary thyroid carcinoma: a study of 3 cases featuring the PIK3CA mutation
Mi Jung Kwon, Young-Soo Rho, Jin Cheol Jeong, Hyung Sik Shin, Jong Seok Lee, Seong Jin Cho, Eun Sook Nam
Human Pathology.2015; 46(8): 1180. CrossRef
Understanding the roles of the P2X7 receptor in solid tumour progression and therapeutic perspectives
Sébastien Roger, Bilel Jelassi, Isabelle Couillin, Pablo Pelegrin, Pierre Besson, Lin-Hua Jiang
Biochimica et Biophysica Acta (BBA) - Biomembranes.2015; 1848(10): 2584. CrossRef
Purinergic signaling pathways in endocrine system
Ivana Bjelobaba, Marija M. Janjic, Stanko S. Stojilkovic
Autonomic Neuroscience.2015; 191: 102. CrossRef
P2X7 receptor stimulates breast cancer cell invasion and migration via the AKT pathway
JIYI XIA, XIAOLAN YU, LI TANG, GANG LI, TAO HE
Oncology Reports.2015; 34(1): 103. CrossRef
Regulation of the P2X7R by microRNA-216b in human breast cancer
Luming Zheng, Xukui Zhang, Feng Yang, Jian Zhu, Peng Zhou, Fang Yu, Lei Hou, Lei Xiao, Qingqing He, Baocheng Wang
Biochemical and Biophysical Research Communications.2014; 452(1): 197. CrossRef

Histopathologic Predictors of Lymph Node Metastasis and Prognosis in Tonsillar Squamous Cell Carcinoma: Dong Jin Lee, Mi Jung Kwon, Eun Sook Nam, Ji Hyun Kwon, Jin Hwan Kim, Young-Soo Rho, Hyung Sik Shin, Seong Jin Cho; Korean J Pathol. 2013;47(3):203-210. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.203

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Abstract PDF

Background

Risk factors for lymph node metastasis in tonsillar squamous cell carcinoma (TSCC) need to be established to determine the degree of surgery required to achieve high curative rates. However, little is known currently about the histopathological features predicting prognosis, specifically in TSCC.

Methods

This study included 53 patients who underwent surgical resection with neck dissection. Clinicopathological factors investigated included age, gender, alcohol use, tobacco consumption, tumor stage, adjacent structure involvement, cell differentiation, squamous dysplasia, in situ carcinoma associated with primary invasive cancer, carcinoma in situ skip lesions, necrosis, invasive front, depth of invasion, and lymphatic, muscle, or perineural invasion.

Results

Contralateral cervical metastasis was associated with higher T stages and soft palate invasion. Lymphatic and muscle invasion were associated with ipsilateral cervical metastasis. Advanced T stage, invasion to the base of tongue, and skip lesions were associated with decreased disease-free survival. Advanced T stage and skip lesions were associated with worse overall survival.

Conclusions

Advanced T stage and soft palate invasion may predict a high risk of contralateral nodal metastasis. T stage and skip lesion are worse prognostic factors in TSCC and should be commented in pathology reports.

Citations

Citations to this article as recorded by

A Systematic Review of Occult Contralateral Neck Metastasis in Tonsillar Squamous Cell Carcinoma
Nihal Punjabi, Arjun Sharma, Jamie Park, Kari Kennedy, Jared C. Inman
The Laryngoscope.2024;[Epub] CrossRef
OpenAi’s ChatGPT-4, BARD and YOU.com (AI) and the Cancer Patient, for Now, Caveat Emptor, but Stay Tuned
Glenn Tisman, Raju Seetharam
Digital Medicine and Healthcare Technology.2023;[Epub] CrossRef
Comprehensive Transcriptome Analysis Reveals the Distinct Gene Expression Patterns of Tumor Microenvironment in HPV-Associated and HPV-Non Associated Tonsillar Squamous Cell Carcinoma
Reham M. Alahmadi, Najat Marraiki, Mohammed Alswayyed, Hatim A. Khoja, Abdullah E. Al-Anazi, Rawan M. Alahmadi, Meshael M. Alkusayer, Bandar Alosaimi, Maaweya Awadalla
Cancers.2023; 15(23): 5548. CrossRef
Predictors of contralateral‐bilateral nodal disease in oropharyngeal cancer: A National Cancer Data Base Study
Masanari G. Kato, Mark A. Ellis, Shaun A. Nguyen, Terry A. Day
Head & Neck.2018; 40(2): 338. CrossRef
Clinical implication of programmed cell death-1 ligand-1 expression in tonsillar squamous cell carcinoma in association with intratumoral heterogeneity, human papillomavirus, and epithelial-to-mesenchymal transition
Mi Jung Kwon, Young-Soo Rho, Eun Sook Nam, Seong Jin Cho, Hye-Rim Park, Soo Kee Min, Jinwon Seo, Ji-Young Choe, Eun Soo Kim, Bumjung Park, Mineui Hong, Kyueng-Whan Min
Human Pathology.2018; 80: 28. CrossRef
Comparison of the eighth version of the American Joint Committee on Cancer manual to the seventh version for colorectal cancer: A retrospective review of our data
Guo-Jun Tong, Gui-Yang Zhang, Jian Liu, Zhao-Zheng Zheng, Yan Chen, Ping-Ping Niu, Xu-Ting Xu
World Journal of Clinical Oncology.2018; 9(7): 148. CrossRef
HIPK2 Overexpression and Its Prognostic Role in Human Papillomavirus-Positive Tonsillar Squamous Cell Carcinoma
Mi Jung Kwon, So Young Kang, Eun Sook Nam, Seong Jin Cho, Young-Soo Rho
BioMed Research International.2017; 2017: 1. CrossRef
Frequent hepatocyte growth factor overexpression and low frequency of c-Met gene amplification in human papillomavirus–negative tonsillar squamous cell carcinoma and their prognostic significances
Mi Jung Kwon, Dong Hoon Kim, Hye-Rim Park, Hyung Sik Shin, Ji Hyun Kwon, Dong Jin Lee, Jin Hwan Kim, Seong Jin Cho, Eun Sook Nam
Human Pathology.2014; 45(7): 1327. CrossRef
CT and MR imaging findings of palatal tumors
Hiroki Kato, Masayuki Kanematsu, Hiroki Makita, Keizo Kato, Daijiro Hatakeyama, Toshiyuki Shibata, Keisuke Mizuta, Mitsuhiro Aoki
European Journal of Radiology.2014; 83(3): e137. CrossRef

Expression of HAT1 and HDAC1, 2, 3 in Diffuse Large B-Cell Lymphomas, Peripheral T-Cell Lymphomas, and NK/T-Cell Lymphomas: Soo Kee Min, Young Ho Koh, Yunwoong Park, Hyo Jung Kim, Jinwon Seo, Hye-Rim Park, Seong Jin Cho, In Sun Kim; Korean J Pathol. 2012;46(2):142-150. Published online April 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.2.142

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Abstract PDF

Background

It has generally been proven that histone acetylation and deacetylation are involved in the malignant transformation. To date, however, this has rarely been studied in cases of malignant lymphoma.

Methods

We studied nine cases of reactive lymphoid hyperplasia, 78 cases of diffuse large B-cell lymphoma (DLBCL), 13 cases of peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS), and 13 cases of extranodal NK/T-cell lymphoma, nasal type (NKTCL). Thus, we attempted to elucidate the associations of the degree of the expression of histone acetyltransferase 1 (HAT1), histone deacetylase (HDAC) 1, HDAC2, and HDAC3 with the clinical behaviors of above malignant lymphomas using the immunohistochemistry and a western blot analysis.

Results

The degree of the expression of HAT1 was higher in cases of DLBCL, PTCL-NOS or NKTCL as compared with reactive lymphoid hyperplasia (p<0.05). The degree of the expression of HAT1 was correlated with that of HDAC1 in cases of DLBCL or NKTCL (p<0.05). The degree of the expression of HAT1 and HDAC1 was correlated with a poor survival in cases of DLBCL or PTCL-NOS (p>0.05).

Conclusions

HAT1, HDAC1, and HDAC2 play a critical role in the development of malignant lymphomas. Both HAT1 and HDAC1 might be indicators for a poor prognosis in cases of DLBCL as cooperating factors.

Citations

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Case Report

Osteoclast-like Giant Cell Tumor of the Parotid Gland Accompanied with Carcinoma ex Pleomorphic Adenoma.: Mi Jung Kwon, Eun Sook Nam, Seong Jin Cho, Hyung Sik Shin, Ji Hyun Kwon, Young Soo Rho; Korean J Pathol. 2011;45:S84-S88.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S84

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Abstract PDF

The origin of osteoclast-like giant cell tumor (OGCT) of the salivary gland has been debated because the prototypic cells of osteoclast-like cells and mononuclear stromal cells are largely unexplained in this gland. Bone marrow-derived CD14+ and CD45+ monocyte-derived multipotential cells (CD14+/CD45+ MOMC) may be one of the possible origins of OGCTs of salivary glands, which have never been explored in salivary OGCTs. We present a case of OGCT accompanied with carcinoma ex pleomorphic adenoma in the parotid gland of a 67-year-old Korean female. The tumor presented as a rapidly growing cervical mass comprising a central area of carcinoma ex pleomorphic adenoma and a peripheral circumferential area of OGCT. The immunohistochemical staining pattern was phenotypically consistent with bone marrow-derived CD14+/CD45+ MOMC. This case is the first report of a salivary OGCT in Korea.

Citations

Citations to this article as recorded by

Tumeur à cellules géantes de type ostéoclastique de la parotide
S. Rammeh, I. Hergli, M.K. M’farrej, N. Znaidi, S. Nechi, R. Zermani
Revue de Stomatologie, de Chirurgie Maxillo-faciale et de Chirurgie Orale.2014; 115(3): 185. CrossRef

Original Article

Expression of Hepatocyte Growth Factor/c-met by RT-PCR in Meningiomas.: Na Rae Kim, Yang Seok Chae, Weon Jeong Lim, Seong Jin Cho; Korean J Pathol. 2011;45(5):463-468.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.5.463

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Abstract PDF: BACKGROUND
Hepatocyte growth factor (HGF) is a potent mitogenic cytokine. C-met protein, which is known to be the HGF receptor has transmembrane tyrosine kinase activity and is encoded by the c-met oncogene. The HGF/c-met signaling pathway may play various roles in the carcinogenesis of various organs.
METHODS
We examined HGF and c-met mRNA expression by utilizing reverse transcription polymerase chain reaction on 40 surgically resected intracranial meningiomas (25 benign, 10 atypical, and 5 anaplastic cases).
RESULTS
An HGF overexpression was detected in 28%, 50%, and 80% of the benign, atypical and anaplastic meningiomas, respectively; a high expression of HGF or the coexpression of HGF/c-met was detected in the high grade meningiomas (the atypical and anaplastic cases, p=0.046, p=0.014). An HGF expression was statistically significant in the recurrent meningiomas (p=0.003), and HGF expression was significantly lower than c-met mRNA expression in benign meningiomas (p=0.034).
CONCLUSIONS
There was no correlation between histologic subtypes and HGF/c-met expression. Determination of HGF expression can be used as a molecular predictor for recurrence of meningioimas. These results suggest that HGF and c-met expression in meningiomas may be associated with anaplastic progression.

Case Report

A Case of Paraduodenal Pancreatitis and Immunohistochemical Analysis.: Mi Jung Kwon, Eun Sook Nam, Seong Jin Cho, Hyung Sik Shin, Joo Seop Kim, Doo Jin Kim; Korean J Pathol. 2010;44(2):199-203.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.2.199

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Abstract PDF: Paraduodenal pancreatitis (PP) is a rare, distinct form of chronic pancreatitis, and it is related to alcohol abuse in middle-aged men. A 36-year-old man with a history of chronic recurrent pancreatitis for 4 years and alcohol abuse for 15 years presented with abdominal pain. Computed tomography revealed a multilocular cystic mass 3.2 x 3 x 3 cm in size and it was located within the muscular layer of the duodenal wall. The cysts were lined by a single layer of eosinophilic cuboidal epithelial cells that stained positively for mucin (MUC)1, MUC6, cytokeratin (CK)7 and CK19 and they stained negatively for MUC2, MUC5AC and CK5/6. Mild, chronic inflammatory reaction around the cystic wall, Brunner's gland hyperplasia and several clusters of heterotopic pancreatic tissue were noted. We report here on a case of PP and we demonstrated that the pancreatitis was of pancreatic ductal cell origin according to the MUC and CK expression patterns we observed on the immunohistochemical analysis.

Original Article

The Expressions of E2F1 and p53 in Gastrointestinal Stromal Tumors and Their Prognostic Significance.: Mi Jung Kwon, Eun Sook Nam, Seong Jin Cho, Hye Rim Park, Hyung Sik Shin, Jong Seok Lee, Chan Heun Park, Woon Geon Shin; Korean J Pathol. 2009;43(3):212-220.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.3.212

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Abstract PDF

BACKGROUND
E2F1 plays a critical role in the G1-to-S phase transition by inducing various genes that encode S phase-activating proteins and that modulate such diverse cellular functions as DNA synthesis, mitosis and apoptosis. The purpose of this study was to assess the E2F1 expression in relation to the clinicopathologic parameters and other tumor markers in gastrointestinal stromal tumors.
METHODS
Immunohistochemical stainings for obtaining the E2F1, p53, and Ki-67 labeling indices were performed on a tissue microarray of 72 gastrointestinal stromal tumor specimens. The clinicopathologic parameters that were analyzed including the risk grade system by Miettinen et al. and the disease-free survival (DFS) rate.
RESULTS
1) An E2F1 expression was correlated with a larger tumor size, a p53 expression and a shorter period of DFS (p=0.014, p=0.007, and p=0.039). 2) A p53 expression was significantly associated with a high risk grade, a larger tumor size, high mitotic counts and a shorter period of DFS (p=0.003, p=0.044, p<0.001, and p<0.0001). 3) A high-risk grade and the epithelioid type were significantly associated with a shorter period of DFS (p=0.0006 and p=0.0008).
CONCLUSIONS
E2F1, as well as p53, may be a potentially novel independent prognostic factor for predicting a worse outcome for those patients suffering with Gastrointestinal stromal tumors.

Citations

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Comparison of tissue microarray and full section in immunohistochemistry of gastrointestinal stromal tumors
Mi Jung Kwon, Eun Sook Nam, Seong Jin Cho, Hye Rim Park, Hyung Sik Shin, Jun Ho Park, Chan Heun Park, Won Jae Lee
Pathology International.2009; 59(12): 851. CrossRef

Case Report

Large-Cell Acanthoma: A case report.: Yu Hoon Kim, Seong Jin Cho, Ae ree Kim, Nam Hee Won, Kye Yong Song; Korean J Pathol. 1996;30(2):161-163.

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Abstract PDF: Large-cell acanthoma is a generally hyperkeratotic, sharply demarcated patch on sun-exposed skin with the outstanding pathologic feature being composed of large, relatively uniform keratinocytes. We describe a case of large-cell acanthoma that involved the skin of the nasal bridge. Patient was a 56-year-old women with a tannish brown patch, 2 cm in size and of 5 years' duration. Controversial issues about nosologic entity of large cell acanthoma are discussed.

Original Articles

The p53 Mutation and DNA Ploidy in Human Metastatic Breast Cancer.: Seong Jin Cho, Ae Ree Kim, Nam Hee Won; Korean J Pathol. 1997;31(2):135-144.

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Abstract PDF: The p53 gene, one of the tumor suppressor genes, is believed to play an important role through mutation and overexpression in the progression of various human malignant tumors. To compare the p53 mutation status between the primary and metastatic lesions of breast cancers and to investigate the mutational pattern of p53, immunohistochemistry (IHC) and polymerase chain reaction and single strand conformational polymorphism (PCR-SSCP) were performed in 25 cases of breast cancers with paraffin embedded tissue. Mutant protein products or point mutation were detected through IHC or PCR-SSCP method. And flow cytometrical (FCM) analysis were performed in the same paraffin blocks to correlate the DNA ploidy and p53 mutation. The following results are summarized. 1. The detection of the p53 gene mutation and overexpression of the p53 protein were measured in 40% and 48%, respectively, in 25 primary tumors, either or both methods was detected in 64%. 2. A concordance rate of the p53 protein expression between the primary and metastatic lesions of 25 breast cancers was 100%, but the concordance rate of the p53 gene mutation was 72%. 3. The correlation between the p53 mutation and the DNA aneuploidy was not statistically significant (p=0.38) 4. A p53 mutation by IHC or PCR-SSCP was more frequently detected in grade III breast cancers than in grade I or II. 5. Among 5 to 9 exons of the p53 gene, exon 7 was the most frequent mutation spot in this study. 6. Additional mutation of the p53 gene was developed in the three metastatic lesions. With the above results it is suggested that the p53 protein overexpression by immunohistochemistry is not correlated with the p53 mutation by PCR-SSCP. The p53 mutation pattern between the primary and metastatic lesions are not idenitical and an additional point mutation can occur in the metastatic lesion. The DNA aneuploidy is more frequently detected in the cases with the p53 protein overexpression than in the p53 protein negative, but it is not statistically significant.

Expression of bcl-2 Protein in Colorectal Adenoma and Adenocarcinoma and its Relationship with p53 and Apoptosis.: Ae Ree Kim, Seong Jin Cho, Nam Hee Won, Yang Seok Chae; Korean J Pathol. 1997;31(5):417-426.

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Abstract PDF: Either increased cellular proliferation or decreased death might result in an expansion of their numbers in the oncogenic process. Cellular apoptosis represents an autonomous suicide pathway that helps to restrict the cell number. However bcl-2 and mutant p53 inhibit programmed cell death. To determine whether the bcl-2 gene is activated during colorectal tumorigenesis and whether it has any relationship with p53 and apoptosis, we studied the expression of bcl-2 and p53 in the normal colonic mucosa, in the adenomatous polyps and in the adenocarcinomas using the immunohistochemical method. Also we evaluated the status of apoptosis using the in situ end labeling method. The bcl-2 immunoreactivity was restricted to the basal epithelial cells of all normal colonic mucosa and they were expressed in all adenomas and 86% of adenocarcinomas, especially in the superficial lesion of some tumors. Mutations of p53 were not found in the normal colonic mucosa, but they were present in dysplastic cells of adenomas (52%) and in cancer cells of the adenocarcinomas (47%). Apoptosis was confined to the tips of the normal colonic mucosa. It was more easily detected in the p53-positive adenomas than in the p53-negative adenomas (p=0.010). In the adenocarcinomas, the findings of apoptotic process are not related with p53 mutation (p=0.3) and bcl-2 expression (p=0.187). p53 and bcl-2 are probably one step of several apoptotic processes in the adenocarcinomas.

Expression of p53 and Matrix Metalloproteinase-2 Proteins in Colorectal Adenocarcinoma.: Seong Jin Cho, Hwa Eun Oh, Yang Seok Chae; Korean J Pathol. 2000;34(7):494-500.

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Abstract PDF: The p53 gene is believed to play an important role through the mutation and overexpression in the progression of various human malignant tumors. The type IV collagenase (matrix metalloproteinase: MMP-2) initiates the degradation of the extracellular matrix, and consequently may play a role in the tumor invasion and metastasis. To investigate the correlation between clinicopathologic features of the colorectal adenocarcinomas and benign tumors and expression of p53 and MMP-2 proteins, we performed an immunohistochemical study on 40 colorectal adenocarcinomas, 20 adenomas and 20 hyperplastic polyps by using the antibodies to p53 and MMP-2 proteins. The positive expression rate of the p53 protein in adenocarcinomas was 62.5% and significantly higher than in benign tumors. The positive expression rate of the MMP-2 protein was 47.5% in adenocarcinomas, but there was no expression of MMP-2 protein in benign tumors. The difference in p53 and MMP-2 expression rates between malignant and non-malignant tumors was statistically significant. The positive expression rate of p53 protein in the non-metastatic and metastatic adenocarcinomas was 59.1 and 66.7%, respectively. The positive expression rate of MMP-2 protein in the non-metastatic and metastatic adencarcinomas was 45.5 and 50.0%, respectively. The correlation between several clinicopathologic features and expression of p53 and MMP-2 protein was not statistically significant, but the rate of positive MMP-2 immunoreactivity showed a statistically significant difference between Astler-Coller stage B1 C1 group and B2 C2 group of adenocarcinoma (p=0.0431). We concluded that the expression of p53 and MMP-2 protein contributes to the cancer development and MMP-2 may play a certain role in the invasiveness of the colorectal tumor. p53 and MMP-2 protein expression is not correlated with lymph node metastasis.

SPARC Expression in Thyroid Follicular Adenomas and Carcinomas.: Chung Yeul Kim, Seong Jin Cho, Min Kyung Kim, Yang Seok Chae; Korean J Pathol. 2000;34(12):1016-1021.

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Abstract PDF: SPARC, secreted protein acidic and rich in cysteine, is a extracellular matrix-associated protein implicated in the modulation of cell adhesion, migration, cell cycle regulation, and angiogenesis. SPARC is expressed in fibrocytes and endothelial cells involved in tissue repair and invasive malignant tumors in the gastrointestinal tract, breast, lung, kidney, adrenal cortex, ovary, and brain. This study was aimed to characterize the different expression of SPARC in the thyroid follicular adenomas and follicular carcinomas. Immunohistochemical staining was performed in paraffin-embedded tissues of 25 follicular adenomas and 15 follicular carcinomas of the thyroid gland. Immunohistochemically, SPARC was not expressed in the 19 follicular adenoma and 2 follicular carcinoma but highly expressed in the 6 follicular adenoma and 13 follicular carcinoma. These findings suggest that SPARC is a potential diagnostic marker of follicular carcinoma and is helpful to distinguish follicular carcinoma from follicular adenoma without vascular or capsular invasion.

K-ras Gene Mutations and Expression of K-ras, p16, Cyclin D1 and p53 in Synchronous Lesions of The Colon Adenoma-Carcinoma Sequences.: Hwa Eun Oh, Seong Jin Cho, Nam Hee Won, Dale Lee, Insun Kim, Bom Woo Yeom; Korean J Pathol. 2001;35(4):291-298.

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Abstract PDF: BACKGROUND
The colorectal adenoma-carcinoma sequence represents a well-known para-digm for the sequential development of cancer driven by the accumulation of genomic defects. Although the colorectal adenoma-carcinoma sequence has been well investigated, the studies about tumors of different dignity co-existent in the same patient are rare. K-ras mutation is an early genetic change in colon cancer. The genes involved in the cell cycle such as cyclin D1, p16, and p53 are important in the tumorigenesis of the colon. The aims of this study were to determine K-ras gene mutation and expression of K-ras, p16, cyclin D1 and p53 in synchronous lesions of the colon adenoma-carcinoma sequences and their possible relationship with K-ras mutation.
METHODS
The materials included 45 colonic adenocarcinomas which were accompanied by adenoma (22 low grade and 26 high grade). By using polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP), we detected K-ras mutation of codon 12. An aberrant K-ras, p16, cyclin D1 and p53 expressions were stained using an immunohistochemical method. RESULTS: K-ras mutation was 52.4% (11/21) of high grade adenomas. K-ras expression was 65.4% (17/26) of high grade adenomas. p16 and cyclin D1 expressions were 50% (11/22) and 90.9% (20/22) of low grade adenomas, respectively. p53 expression was 75.6% (34/45) of adenocarcinomas. There were statistical correlations among K-ras, p16 and cyclin D1.
CONCLUSIONS
These results indicate that the ras gene mutation is an early event and the overexpressions of p16, cyclin D1 and p53 are associated with K-ras mutation and expression in adenoma-carcinoma sequences.

Case Reports

Cytologic Diagnosis of Malignant Fibrous Histiocytoma in Pleural Fluid: A Case Report.: Hwa Eun Oh, Yoo Hoon Kim, Seong Jin Cho, Young Sik Kim, In Sun Kim; Korean J Cytopathol. 1995;6(1):80-83.

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Abstract PDF: Malignant fibrous histiocytoma is the most common soft tissue sarcoma of late adult life, but it is rare in the pleura. We recently experienced a case of cytology of malignant fibrous histiocytoma in pleural fluid. The smear revealed histiocytic malignant cells, spindle malignant cells and inflammatory cells. The histiocytic cells showed abundant, pale cytoplasm and ovoid, irregular, eccentrically placed nuclei. The spindle cells showed elongated nuclei. Intercellular collagen was also present.

Cytologic Features of Medullary Carcinoma of the Thyroid Occurring in a Child: A Case Report.: Jeong Seok Moon, Hye Sun Kim, Seong Jin Cho, Yang Seok Chae, Bom Woo Yeom; Korean J Cytopathol. 1996;7(2):213-217.

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Abstract PDF: Medullary carcinoma of the thyroid gland is a malignant neuroendocrine tumor arising from calcitonin producing-parafollicular cells. The tumor is clinically divided into sporadic and familial form, constituting about 80% and 20%, respectively. Recently, we experienced a case of unilateral and solitary sporadic medullary carcinoma of the left thyroid gland. The patient was a 9 year-old female, who presented with a palpable mass on the anterior lateral neck of 8 months duration without any familial and personal history of neuroendocrine disease. The cytopathologic findings showed spindle cells and plasmacytoid cells in the background of colloid-like materal. The nuclei were eccentrically located, mildly hyperchromatic and pleomorphic, showing speckled chromatin pattern without nuclear inclusion or prominent nucleoli. The cytoplasm was abundant and had a pale granular cyanophilic appearance. No amyloid materal could be identified.

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