Publications by authors named "Minh-Khang Le"

Background: Although the criteria for follicular-pattern thyroid tumors are well-established, diagnosing these lesions remains challenging in some cases. In the recent World Health Organization Classification of Endocrine and Neuroendocrine Tumors (5th edition), the invasive encapsulated follicular variant of papillary thyroid carcinoma was reclassified as its own entity. It is crucial to differentiate this variant of papillary thyroid carcinoma from low-risk follicular pattern tumors due to their shared morphological characteristics.

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Tumor-stroma ratio (TSR) has been recognized as a valuable prognostic indicator in various solid tumors. This study aimed to examine the clinicopathologic relevance of TSR in Merkel cell carcinoma (MCC) using artificial intelligence (AI)-based parameterization of the stromal landscape and validate TSR scores generated by our AI model against those assessed by humans. One hundred twelve MCC cases with whole-slide images were collected from 4 different institutions.

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Background: C-X-C motif chemokine ligand 5 (CXCL5) is a chemokine molecule that is secreted by immune cells in attracting granulocytes. Studies showed that CXCL5 was related to the progression of papillary thyroid carcinoma (PTC) tumor cells. However, the in vivo effects of CXCL5 on PTC tumor cells and their microenvironment have not been elucidated.

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Article Synopsis
  • PRAME is an important marker that helps distinguish between benign dysplastic nevi (DN) and malignant nevus-associated melanoma in situ (MIS).
  • In a study of 172 DN and 38 MIS cases, 71.1% of MIS showed positive PRAME expression, while all DN were negative, with only 5.7% of DN cases showing any positivity.
  • The findings suggest that PRAME expression is particularly useful in identifying MIS that arise from DN, especially those with both epidermal and dermal components.
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The circadian clock (CC) has biological and clinical implications in gliomas. Most studies focused on CC effects on the tumor microenvironment and the application of chronotherapy. The present study focused on CC gene expression patterns and intracellular oncogenic activities.

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Article Synopsis
  • - Claudin-4 is crucial for tight junctions in the skin, contributing to the epidermal barrier and regulating movement between cells.
  • - The study analyzed 35 blistering disorders and found varying levels of claudin-4 expression, particularly in conditions like pemphigus vulgaris and bullous pemphigoid.
  • - Results indicate that claudin-4 may increase as a response to barrier dysfunction in these disorders, potentially revealing underlying mechanisms affecting skin integrity.
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Acquired cystic disease-associated renal cell carcinoma (ACD-RCC) is a common subtype of renal cell carcinoma (RCC) in end-stage renal disease (ESRD) patients. The current systematic review and meta-analysis was performed to evaluate the clinicopathological, and genetic characteristics of patients with ACD-RCC. A systematic search on three electronic databases including the Pubmed, Scopus, and Web of Science databases were performed until December 31, 2022.

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Introduction: We aimed to investigate the expression and prognostic role of NAA10 in clear cell renal cell carcinoma (ccRCC).

Material And Methods: We performed a gene expression and survival analysis based on the human cancer genome atlas database of ccRCC patients (TCGA-KIRC).

Results: The patients in the TCGA-KIRC (n = 537) were divided into two subgroups: NAA10-low and NAA10-high expression groups.

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New applications of immunohistochemistry (IHC) expand rapidly due to the development of molecular analyses and an increased understanding of molecular biology. IHC becomes much more important as a screening or even a confirmatory test for molecular changes in cancer. The past decades have witnessed the release of many immunohistochemical markers of the new generation.

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Background: , the gene which encodes organic cation transporter (OCT)-3, has been linked to the prognosis of several types of cancer. However, its role in lung squamous cell carcinoma (LSCC) has not been addressed elsewhere.

Methods: We analyzed gene expression, DNA methylation, and clinicopathological data from The Cancer Genome Atlas - Lung Squamous Cell Carcinoma (TCGA-LUSC) (n=501), a publicly available database exclusively consisting of LSCC patients.

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Article Synopsis
  • Extranodal NK/T-cell lymphoma (ENKTL) shows variability in the expression of important cytotoxic molecules like granzyme B (GZMB), which plays a role in the disease's biological behavior and patient outcomes.
  • A study analyzed 71 ENKTL samples and classified them into two groups based on gene expression profiling, where Group B had significantly lower levels of GZMB and related signaling pathways linked to inflammation.
  • The findings suggest that GZMB-negative ENKTLs often indicate a more advanced clinical stage, proposing GZMB as a potential biomarker for assessing disease severity in ENKTL patients.
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Background: PRAME (PReferentially expressed Antigen in MElanoma) is a biomarker studied in various human cancers. Little is known about the biological implications of PRAME in glioma. We aimed to perform a comprehensive analysis to explore PRAME gene expression and its biological and clinicopathological significance in gliomas.

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Stratify new lung cancer patients based on the risk of in-hospital mortality rate after diagnosis. 522,941 lung cancer cases with available data on the Surveillance, Epidemiology, and End Results (SEER) were analyzed for the predicted probability based on six fundamental variables including age, gender, tumor size, T, N, and AJCC stages. The patients were randomly assigned to the training ( = 115,145) and validation datasets ( = 13,017).

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NAA10 is a novel biomarker of cancer progression. The oncogenic and biological mechanisms of NAA10 in human malignancies are controversial and remain to be elucidated. Herein, we investigated the biological and clinicopathological implications of NAA10 gene expression in adult gliomas.

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The pathology of asthma is characterized by marked day-night variation, which is likely controlled by circadian clock activity. This study aimed to clarify the association of core circadian clock gene expression with clinical features of asthma. For this purpose, we accessed the National Center for Biotechnology Information database and analyzed transcriptomes of peripheral blood mononuclear cells and clinical characteristics of 134 pediatric/adolescent patients with asthma.

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Objective: There is a lack of data about the clinicopathological and molecular characteristics of de novo versus secondary dedifferentiated chordoma (DC). This integrated study aimed to investigate the similarities and differences in clinicopathological manifestations, prognoses, and molecular profiles of these 2 subtypes.

Methods: We accessed the Surveillance, Epidemiology, and End Results (SEER) Program for DC cases from 1975 to 2020.

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This study aimed to reveal the prognostic role of the Hippo pathway in different histopathological subtypes of renal cell carcinoma (RCC). The TCGA-KIRC (n = 537), TCGA-KIRP (n = 291) and TCGA-KICH (n = 113), which contain data about clear cell (ccRCC), papillary (pRCC) and chromophobe RCC (chRCC), respectively, were investigated. Gene Set Variation Analysis was used to compare the activity of many pathways within a single sample.

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Purpose: Tumor-stroma ratio (TSR) of invasive breast carcinoma has gained attention in recent years due to its prognostic significance. Previous studies showed TSR is a potential biomarker for indicating the tumor response to neoadjuvant chemotherapy. However, it is not clear how well TSR evaluation in biopsy specimens might reflect the TSR in resection specimens.

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Background: Previous studies have not been consistent in the risk of metastasis in follicular thyroid carcinoma (FTC). Therefore, we conducted a large population study to stratify the risk of distant metastasis in FTC patients using only clinical parameters.

Methods: We extracted FTC patients from The Surveillance, Epidemiology, and End Results (SEER) database and divided them into training and validation cohorts.

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Objective: DICER1-mutant malignant brain neoplasms are very rare tumors, and published data have relied on case reports or small case series. In this review, the authors aimed to systematically summarize the types and distribution patterns of DICER1 mutations, clinicopathological characteristics, and prognostic outcomes of these tumors.

Methods: The authors searched PubMed and Web of Science for relevant studies.

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The risk of distant metastasis in medullary thyroid carcinoma (MTC) has not been well studied. Additional evaluation of MTC metastatic risk can be helpful for improving the quality of medical management. Therefore, we conducted a large population study to develop a method to stratify the risk of metastasis at the initial presentation of MTC patients.

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Background: Pleomorphic sarcoma of soft tissue (PSST) is a heterogeneous group of sarcomas with different prognoses. Survival patterns of this tumor group have not been thoroughly investigated. Prognostic models should be developed to support individualized evaluation of PSST patients.

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Background: Tumor-infiltrating lymphocytes (TILs) are associated with various clinicopathological features. Using cytologic specimens for assessing TILs remains to be established. This retrospective study aimed to establish a practical method to assess TILs in cytologic samples.

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