Journal of Pathology and Translational Medicine

Shin Kwang Khang

3 Articles

Protein Phosphatase Magnesium-Dependent 1δ (PPM1D) Expression as a Prognostic Marker in Adult Supratentorial Diffuse Astrocytic and Oligodendroglial Tumors: Hui Jeong Jeong, Chang Gok Woo, Bora Lee, Shin Kwang Khang, Soo Jeong Nam, Jene Choi; J Pathol Transl Med. 2018;52(2):71-78. Published online October 18, 2017; DOI: https://doi.org/10.4132/jptm.2017.10.21

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Background
Protein phosphatase magnesium-dependent 1δ (PPM1D) is a p53-induced serine/ threonine phosphatase, which is overexpressed in various human cancers. A recent study reported that a mutation in the PPM1D gene is associated with poor prognosis in brainstem gliomas. In this study, we evaluated the utility of PPM1D as a prognostic biomarker of adult supratentorial diffuse astrocytic and oligodendroglial tumors.
Methods
To investigate PPM1D protein expression, mRNA expression, and copy number changes, immunohistochemistry, RNAscope in situ hybridization, and fluorescence in situ hybridization were performed in 84 adult supratentorial diffuse gliomas. We further analyzed clinical characteristics and overall survival (OS) according to PPM1D protein expression, and examined its correlation with other glioma biomarkers such as isocitrate dehydrogenase (IDH) mutation, and p53 expression.
Results
Forty-six cases (54.8%) were PPM1D-positive. PPM1D expression levels were significantly correlated with PPM1D transcript levels (p= .035), but marginally with PPM1D gene amplification (p=.079). Patients with high-grade gliomas showed a higher frequency of PPM1D expression than those with low-grade gliomas (p <.001). Multivariate analysis demonstrated that PPM1D expression (hazard ratio [HR], 2.58; p=.032), age over 60 years (HR, 2.55; p=.018), and IDH1 mutation (HR, 0.18; p=.002) were significantly independent prognostic factors; p53 expression had no prognostic significance (p=.986). The patients with tumor expressing PPM1D showed a shorter OS (p=.003). Moreover, patients with tumor harboring wild-type IDH1 and PPM1D expression had the worst OS (p<.001).
Conclusions
Our data suggest that a subset of gliomas express PPM1D; PPM1D expression is a significant marker of poor prognosis in adult supratentorial diffuse astrocytic and oligodendroglial tumors.

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Metal-dependent Ser/Thr protein phosphatase PPM family: Evolution, structures, diseases and inhibitors
Rui Kamada, Fuki Kudoh, Shogo Ito, Itsumi Tani, Jose Isagani B. Janairo, James G. Omichinski, Kazuyasu Sakaguchi
Pharmacology & Therapeutics.2020; 215: 107622. CrossRef

Diagnostic Significance of Cellular Neuroglial Tissue in Ovarian Immature Teratoma: Yun Chai, Chang Gok Woo, Joo-Young Kim, Chong Jai Kim, Shin Kwang Khang, Jiyoon Kim, In Ah Park, Eun Na Kim, Kyu-Rae Kim; J Pathol Transl Med. 2017;51(1):49-55. Published online October 14, 2016; DOI: https://doi.org/10.4132/jptm.2016.09.19

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Abstract PDF

Background
Immature teratoma (IT) is a tumor containing immature neuroectodermal tissue, primarily in the form of neuroepithelial tubules. However, the diagnosis of tumors containing only cellular neuroglial tissue (CNT) without distinct neuroepithelial tubules is often difficult, since the histological characteristics of immature neuroectodermal tissues remain unclear. Here, we examined the significance of CNT and tried to define immature neuroectodermal tissues by comparing the histological features of neuroglial tissues between mature teratoma (MT) and IT.
Methods
The histological features of neuroglial tissue, including the cellularity, border between the neuroglial and adjacent tissues, cellular composition, mitotic index, Ki-67 proliferation rate, presence or absence of tissue necrosis, vascularity, and endothelial hyperplasia, were compared between 91 MT and 35 IT cases.
Results
CNTs with a cellularity grade of ≥ 2 were observed in 96% of IT cases and 4% of MT cases (p < .001); however, CNT with a cellularity grade of 3 in MT cases was confined to the histologically distinct granular layer of mature cerebellar tissue. Moreover, CNT in IT exhibited significantly higher rates of Ki-67 proliferation, mitoses, and necrosis than those in MT (p < .001). Furthermore, an infiltrative border of neuroglial tissue and glomeruloid endothelial hyperplasia were significantly more frequent in IT cases than in MT cases (p < .001).
Conclusions
Our results suggest that if CNT with a cellularity grade of ≥ 2 is not a component of cerebellar tissue, such cases should be diagnosed as IT containing immature neuroectodermal tissue, particularly if they exhibit an infiltrative border, mitoses, necrosis, and increased Ki-67 proliferation.

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Benign ovarian teratoma in the dog with predominantly nervous tissue: A case report
Peter Makovicky, Alexander Vladimirovic Makarevich, Pavol Makovicky, Alireza Seidavi, Luca Vannucci, Kvetoslava Rimarova
Veterinární medicína.2022; 67(2): 99. CrossRef
Fascin as a Useful Marker for Identifying Neural Components in Immature Teratomas of Human Ovary and Those Derived From Murine Embryonic Stem Cells
Ryunosuke Umehara, Atsushi Kurata, Masakatsu Takanashi, Hirotsugu Hashimoto, Koji Fujita, Toshitaka Nagao, Masahiko Kuroda
International Journal of Gynecological Pathology.2019; 38(4): 377. CrossRef
Cerebellar Differentiation in Ovarian Teratoma
Colin J.R. Stewart, Maxine L. Crook
International Journal of Gynecological Pathology.2018; 37(4): 316. CrossRef
Mitotic activity of epithelia of ectoand entodermal types in spontaneous and experimental teratomas of mice
Pavel A. Dyban
Medical academic journal.2018; 18(4): 42. CrossRef
Ovarian cystectomy in the treatment of apparent early-stage immature teratoma
Ting Zhao, Yan Liu, Xiao Wang, Hao Zhang, Yuan Lu
Journal of International Medical Research.2017; 45(2): 771. CrossRef

Cytological Evaluation and REBA HPV-ID HPV Testing of Newly Developed Liquid-Based Cytology, EASYPREP: Comparison with SurePath: Youn Soo Lee, Gyungyub Gong, Jin Hee Sohn, Ki Sung Ryu, Jung Hun Lee, Shin Kwang Khang, Kyung-Ja Cho, Yong-Man Kim, Chang Suk Kang; Korean J Pathol. 2013;47(3):265-274. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.265

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Abstract PDF

Background

The objective of this study was to evaluate a newly-developed EASYPREP liquid-based cytology method in cervicovaginal specimens and compare it with SurePath.

Methods

Cervicovaginal specimens were prospectively collected from 1,000 patients with EASYPREP and SurePath. The specimens were first collected by brushing for SurePath and second for EASYPREP. The specimens of both methods were diagnosed according to the Bethesda System. Additionally, we performed to REBA HPV-ID genotyping and sequencing analysis for human papillomavirus (HPV) on 249 specimens.

Results

EASYPREP and SurePath showed even distribution of cells and were equal in cellularity and staining quality. The diagnostic agreement between the two methods was 96.5%. Based on the standard of SurePath, the sensitivity, specificity, positive predictive value, and negative predictive value of EASYPREP were 90.7%, 99.2%, 94.8%, and 98.5%, respectively. The positivity of REBA HPV-ID was 49.4% and 95.1% in normal and abnormal cytological samples, respectively. The result of REBA HPV-ID had high concordance with sequencing analysis.

Conclusions

EASYPREP provided comparable results to SurePath in the diagnosis and staining quality of cytology examinations and in HPV testing with REBA HPV-ID. EASYPREP could be another LBC method choice for the cervicovaginal specimens. Additionally, REBA HPV-ID may be a useful method for HPV genotyping.

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High-Risk Human Papillomavirus Detection via Cobas® 4800 and REBA HPV-ID® Assays
Sasiprapa Liewchalermwong, Shina Oranratanaphan, Wichai Termrungruanglert, Surang Triratanachat, Patou Tantbirojn, Nakarin Kitkumthorn, Parvapan Bhattarakosol, Arkom Chaiwongkot
Viruses.2022; 14(12): 2713. CrossRef
Evaluation of nuclear chromatin using grayscale intensity and thresholded percentage area in liquid-based cervical cytology
Hyekyung Lee, Myungein Han, Taejo Yoo, Chanho Jung, Hyun-Jin Son, Migyung Cho
Diagnostic Cytopathology.2018; 46(5): 384. CrossRef
Comparison of EASYPREP®and SurePath®in thyroid fine-needle aspiration
Yosep Chong, Ki Hyun Baek, Jee Young Kim, Tae-Jung Kim, Eun Jung Lee, Chang Suk Kang
Diagnostic Cytopathology.2016; 44(4): 283. CrossRef

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