Journal of Pathology and Translational Medicine

Case Study

Primary epithelioid inflammatory myofibroblastic sarcoma of the brain with EML4::ALK fusion mimicking intra-axial glioma: a case report and brief literature review: Eric Eunshik Kim, Chul-Kee Park, Koung Mi Kang, Yoonjin Kwak, Sung-Hye Park, Jae-Kyung Won; J Pathol Transl Med. 2024;58(3):141-145. Published online May 14, 2024; DOI: https://doi.org/10.4132/jptm.2024.04.12

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Abstract PDF: An aggressive subtype of inflammatory myofibroblastic tumor, epithelioid inflammatory myofibroblastic sarcoma occurs primarily inside the abdominal cavity, followed by a pulmonary localization. Most harbor anaplastic lymphoma kinase (ALK) gene rearrangements, with RANBP2 and RRBP1 among the well-documented fusion partners. We report the second case of primary epithelioid inflammatory myofibroblastic sarcoma of the brain, with a well-known EML4::ALK fusion. The case is notable for its intra-axial presentation that clinico-radiologically mimicked glioma.

Original Article

Reclassification of Mixed Oligoastrocytic Tumors Using a Genetically Integrated Diagnostic Approach: Seong-Ik Kim, Yujin Lee, Jae-Kyung Won, Chul-Kee Park, Seung Hong Choi, Sung-Hye Park; J Pathol Transl Med. 2018;52(1):28-36. Published online September 29, 2017; DOI: https://doi.org/10.4132/jptm.2017.09.25

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Background
Mixed gliomas, such as oligoastrocytomas (OA), anaplastic oligoastrocytomas, and glioblastomas (GBMs) with an oligodendroglial component (GBMO) are defined as tumors composed of a mixture of two distinct neoplastic cell types, astrocytic and oligodendroglial. Recently, mutations ATRX and TP53, and codeletion of 1p/19q are shown to be genetic hallmarks of astrocytic and oligodendroglial tumors, respectively. Subsequent molecular analyses of mixed gliomas preferred the reclassification to either oligodendroglioma or astrocytoma. This study was designed to apply genetically integrated diagnostic criteria to mixed gliomas and determine usefulness and prognostic value of new classification in Korean patients.
Methods
Fifty-eight cases of mixed OAs and GBMOs were retrieved from the pathology archives of Seoul National University Hospital from 2004 to 2015. Reclassification was performed according to genetic and immunohistochemical properties. Clinicopathological characteristics of each subgroup were evaluated. Overall survival was assessed and compared between subgroups.
Results
We could reclassify all mixed OAs and GBMOs into either astrocytic or oligodendroglial tumors. Notably, 29 GBMOs could be reclassified into 11 cases of GBM, IDH-mutant, 16 cases of GBM, IDH-wildtype, and two cases of anaplastic oligodendroglioma, IDH mutant. Overall survival was significantly different among these new groups (p<.001). Overall survival and progression-free survival were statistically better in gliomas with IDH mutation, ATRX mutation, no microscopic necrosis, and young patient age (cut off, 45 years old).
Conclusions
Our results strongly suggest that a genetically integrated diagnosis of glioma better reflects prognosis than former morphology-based methods.

Citations

Citations to this article as recorded by

The prognostic significance of p16 expression pattern in diffuse gliomas
Jin Woo Park, Jeongwan Kang, Ka Young Lim, Hyunhee Kim, Seong-Ik Kim, Jae Kyung Won, Chul-Kee Park, Sung-Hye Park
Journal of Pathology and Translational Medicine.2021; 55(2): 102. CrossRef
Dynamic susceptibility contrast and diffusion MR imaging identify oligodendroglioma as defined by the 2016 WHO classification for brain tumors: histogram analysis approach
Anna Latysheva, Kyrre Eeg Emblem, Petter Brandal, Einar Osland Vik-Mo, Jens Pahnke, Kjetil Røysland, John K. Hald, Andrés Server
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Review

Good Laboratory Standards for Clinical Next-Generation Sequencing Cancer Panel Tests: Jihun Kim, Woong-Yang Park, Nayoung K. D. Kim, Se Jin Jang, Sung-Min Chun, Chang-Ohk Sung, Jene Choi, Young-Hyeh Ko, Yoon-La Choi, Hyo Sup Shim, Jae-Kyung Won; J Pathol Transl Med. 2017;51(3):191-204. Published online May 10, 2017; DOI: https://doi.org/10.4132/jptm.2017.03.14

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1,077 Download
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Abstract PDF

Next-generation sequencing (NGS) has recently emerged as an essential component of personalized cancer medicine due to its high throughput and low per-base cost. However, no sufficient guidelines for implementing NGS as a clinical molecular pathology test are established in Korea. To ensure clinical grade quality without inhibiting adoption of NGS, a taskforce team assembled by the Korean Society of Pathologists developed laboratory guidelines for NGS cancer panel testing procedures and requirements for clinical implementation of NGS. This consensus standard proposal consists of two parts: laboratory guidelines and requirements for clinical NGS laboratories. The laboratory guidelines part addressed several important issues across multistep NGS cancer panel tests including choice of gene panel and platform, sample handling, nucleic acid management, sample identity tracking, library preparation, sequencing, analysis and reporting. Requirements for clinical NGS tests were summarized in terms of documentation, validation, quality management, and other required written policies. Together with appropriate pathologist training and international laboratory standards, these laboratory standards would help molecular pathology laboratories to successfully implement NGS cancer panel tests in clinic. In this way, the oncology community would be able to help patients to benefit more from personalized cancer medicine.

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