Journal of Pathology and Translational Medicine

Yeon Il Choi

2 Articles

Preparation of Compact Agarose Cell Blocks from the Residues of Liquid-Based Cytology Samples: Suk Jin Choi, Yeon Il Choi, Lucia Kim, In Suh Park, Jee Young Han, Joon Mee Kim, Young Chae Chu; Korean J Pathol. 2014;48(5):351-360. Published online October 27, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.351

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Background: Inevitable loss of diagnostic material should be minimized during cell block preparation. We introduce a modified agarose cell block technique that enables the synthesis of compact cell blocks by using the entirety of a cell pellet without the loss of diagnostic material during cell block preparations. The feasibility of this technique is illustrated by high-throughput immunocytochemistry using high-density cell block microarray (CMA). Methods: The cell pellets of Sure- Path residues were pre-embedded in ultra-low gelling temperature agarose gel and re-embedded in standard agarose gel. They were fixed, processed, and embedded in paraffin using the same method as tissue sample processing. The resulting agarose cell blocks were trimmed and represented on a CMA for high-throughput analysis using immunocytochemical staining. Results: The SurePath residues were effectively and entirely incorporated into compact agarose cell buttons and embedded in paraffin. Sections of the agarose cell blocks revealed cellularities that correlated well with corresponding SurePath smears and had immunocytochemical features that were sufficient for diagnosis of difficult cases. Conclusions: This agarose-based compact cell block technique enables preparation of high-quality cell blocks by using up the residual SurePath samples without loss of diagnostic material during cell block preparation.

Citations

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In-house Manual Construction of High-Density and High-Quality Tissue Microarrays by Using Homemade Recipient Agarose-Paraffin Blocks: Kyu Ho Kim, Suk Jin Choi, Yeon Il Choi, Lucia Kim, In Suh Park, Jee Young Han, Joon Mee Kim, Young Chae Chu; Korean J Pathol. 2013;47(3):238-244. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.238

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Abstract PDF

Background

Self-made tissue punches can be effectively used to punch holes in blank recipient paraffin blocks and extract tissue cores from the donor paraffin blocks for the low-cost construction of tissue microarrays (TMAs). However, variable degrees of section distortion and loss of the tissue cores can occurs during cutting of the TMAs, posing technical problems for in-house manual construction of high-density TMAs. We aimed to update the method for in-house manual TMA construction to improve the quality of high-density TMAs.

Methods

Blocks of agarose gel were subjected to the standard tissue processing and embedding procedure to prepare recipient agarose-paraffin blocks. The self-made tissue punches and recipient agarose-paraffin blocks were used to construct TMAs, which were completely melted and re-embedded in paraffin to make finished TMA blocks.

Results

The donor tissue cores were completely integrated into the surrounding paraffin of the recipient blocks. This method enabled us to construct high-density TMAs with significantly less section distortion or loss of tissue cores during microtomy.

Conclusions

Simple and inexpensive construction of high-density and high-quality TMAs can be warranted by using paraffinized agarose gels as recipient blocks.

Citations

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Tammy Sexton, Gregory L. Kucera, Edward A. Levine, Kounosuke Watabe, Stacey S. O'Neill
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Platelet-derived growth factor receptor α in hepatocellular carcinoma is a prognostic marker independent of underlying liver cirrhosis
Jung-Hwan Yu, Joon Mee Kim, Ja Kyung Kim, Suk Jin Choi, Kwan Sik Lee, Jin-Woo Lee, Hye Young Chang, Jung Il Lee
Oncotarget.2017; 8(24): 39534. CrossRef
Prognostic Implication of Semi-quantitative Immunohistochemical Assessment of CD20 Expression in Diffuse Large B-Cell Lymphoma
Chang Hwan Choi, Young Hoon Park, Joo Han Lim, Suk Jin Choi, Lucia Kim, In Suh Park, Jee Young Han, Joon Mee Kim, Young Chae Chu
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Asian Pacific Journal of Cancer Prevention.2015; 16(3): 1129. CrossRef

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