Objectives: This study aimed to determine whether Ki-67 index evaluated on cytologic material could reliably grade pancreatic neuroendocrine tumors (PanNETs).
Methods: Cases with adequate cell block and available surgical specimens were included. Ki-67 index was calculated using "eyeballing," "hot spot," and "complete" counting methods.
Results: The overall concordance rates between cytology and surgical specimens were 71%, 73%, and 59%, respectively, by using eyeballing, hot spot, and complete counting approaches. All grade 1 tumors were correctly graded on cytology, but in grade 2 tumors concordance rates were only 36%, 41%, and 9%, respectively. All grade 2 tumors were undergraded when cell blocks contained fewer than 1,000 cells, while concordance rate increased to 57%, 64%, and 14%, respectively, in cases with 1,000 cells or more.
Conclusions: Grade 2 PanNETs can be significantly undergraded when Ki-67 index is evaluated on cell block material. In cases with 1,000 or more cells, the hot spot counting method has better correlation with surgical specimens.
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http://dx.doi.org/10.1093/ajcp/aqz110 | DOI Listing |
PLoS One
January 2025
Department of Neurosurgery, Osaka University Graduate School of Medicine, Osaka, Japan.
Background: Glioblastoma is characterized by neovascularization and diffuse infiltration into the adjacent tissue. T2*-based dynamic susceptibility contrast (DSC) MR perfusion images provide useful measurements of the biomarkers associated with tumor perfusion. This study aimed to distinguish infiltrating tumors from vasogenic edema in glioblastomas using DSC-MR perfusion images.
View Article and Find Full Text PDFNaunyn Schmiedebergs Arch Pharmacol
January 2025
Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, 22758, Egypt.
This study investigates the protective effects of resveratrol (RSV) against heat stress (HS)-induced testicular injury in rats. Climate change has exacerbated heat stress, particularly affecting male fertility by impairing testicular function and sexual behavior. A total of 32 rats were allocated into four experimental groups: control, RSV control, HS control, and RSV + HS.
View Article and Find Full Text PDFToxicol Res (Camb)
January 2025
Department of Obstetrics and Gynecology, Jinggangshan University Clinical School of Medicine, No. 28 Xueyuan Road, Ji'an, Jiangxi 343000, China.
Ovarian cancer (OC) is a significant cause of cancer-related mortality among women. This study explores the efficacy of L. () extract, known for its phytoestrogenic properties, in treating OC through hormonal and metabolic modulation.
View Article and Find Full Text PDFAcad Radiol
January 2025
Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (Y.X., B.X., Z.W., C.P., M.X.). Electronic address:
Rationale And Objectives: To develop and externally validate interpretable CT radiomics-based machine learning (ML) models for preoperative Ki-67 expression prediction in clear cell renal cell carcinoma (ccRCC).
Methods: 506 patients were retrospectively enrolled from three independent institutes and divided into the training (n=357) and external test (n=149) sets. Ki67 expression was determined by immunohistochemistry (IHC) and categorized into low (<15%) and high (≥15%) expression groups.
J Cancer
January 2025
Department of Pharmacology, The Yancheng Clinical College of Xuzhou Medical University, The First people's Hospital of Yancheng, Yancheng, China.
Longikaurin A (LK-A), a naturally occurring ent-kaurane diterpenoid, has been identified as a promising anti-cancer agent. This study aims to elucidate the anti-tumorigenic effects of LK-A on oral squamous cell carcinoma (OSCC) cells and to unravel its underlying mechanisms. assays, including CCK-8 and EdU, were performed to assess cell viability and proliferation.
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