Publications by authors named "Kiat Tan"

Background: Uterine fibroid embolization can be associated with significant pain due to fibroid ischemia and interventions of the procedure itself. Fentanyl and midazolam are commonly provided for sedation and pain relief, but are not tolerated by all patients. This report outlines a novel pain management strategy for uterine fibroid embolization in a patient who could not receive either opioids or benzodiazepines.

View Article and Find Full Text PDF

Background: The management of the axilla in breast cancer patients with isolated chest wall recurrence (CWR) after mastectomy remains controversial. Although sentinel lymph node biopsy (SLNB) for restaging is feasible, its role is unclear. We aimed to determine if the omission of axillary restaging surgery in female patients with operable presumably isolated CWRs could result in an increased risk of second recurrences.

View Article and Find Full Text PDF

Purpose: Metaplastic breast cancer (MBC) is a rare and heterogeneous breast cancer subtype, and there are critical gaps in our understanding of its long-term outcomes. This retrospective cohort study aimed to address these gaps by scrutinizing the pathologic and clinical aspects of MBC to enhance clinical decision-making and refine patient care strategies.

Methods And Materials: This registry-based retrospective cohort study included women aged ≥21 years diagnosed with MBC or matrix-producing carcinoma.

View Article and Find Full Text PDF

While arteriovenous fistulas (AVFs) are the optimal route of access for hemodialysis in terms of duration of patency and infection rates, they can still fail due a variety of reasons. Most commonly, AVF failure is due to venous stenotic lesions, resulting in reduced blood flow rate across the fistula. Fistulograms are often used to investigate cases of symptomatic or poor fistula function.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on identifying RNA interactions between host cells and Zika (ZIKV) and dengue viruses (DENV-1), revealing that numerous human coding and non-coding RNAs bind to these viruses.
  • It finds that host RNAs typically attach to single-stranded regions of the virus genomes and that some host RNAs may facilitate viral replication while others hinder it.
  • The research uncovers a group of conserved host RNAs that interact with multiple RNA viruses, indicating their critical role in the viral infection process and enhancing our understanding of RNA-based regulation during viral diseases.
View Article and Find Full Text PDF

Obesity is associated with an increased risk of developing breast cancer (BC) and worse prognosis in BC patients, yet its impact on BC biology remains understudied in humans. This study investigates how the biology of untreated primary BC differs according to patients' body mass index (BMI) using data from >2,000 patients. We identify several genomic alterations that are differentially prevalent in overweight or obese patients compared to lean patients.

View Article and Find Full Text PDF

Somatic and germline gain-of-function point mutations in RAF, one of the first oncogenes to be discovered in humans, delineate a group of tumor-prone syndromes known as the RASopathies. In this study, we document the first human phenotype resulting from the germline loss-of-function of the proto-oncogene RAF1 (a.k.

View Article and Find Full Text PDF

form the dominant eukaryotic microbial community on the human skin. The genus possesses a repertoire of secretory hydrolytic enzymes involved in protein and lipid metabolism which alter the external cutaneous environment. The exact role of most secreted enzymes, including those in interaction with the epithelial surface, is not well characterized.

View Article and Find Full Text PDF

Human NLRP1 (NACHT, LRR, and PYD domain-containing protein 1) is an innate immune sensor predominantly expressed in the skin and airway epithelium. Here, we report that human NLRP1 senses the ultraviolet B (UVB)- and toxin-induced ribotoxic stress response (RSR). Biochemically, RSR leads to the direct hyperphosphorylation of a human-specific disordered linker region of NLRP1 (NLRP1) by MAP3K20/ZAKα kinase and its downstream effector, p38.

View Article and Find Full Text PDF

Background: The development of atrioventricular bioprosthesis has witnessed an increasing drive toward clinical translation over the last few decades. A significant challenge in the clinical translation of an atrioventricular bioprosthesis from bench to bedside is the appropriate choice of a large animal model to test the safety and effectiveness of the device.

Methods: We conducted a systematic review of pre-clinical in vivo studies that would enable us to synthesize a recommended framework.

View Article and Find Full Text PDF

Introduction: Statins, HMG-CoA reductase inhibitors, are commonly used cholesterol-lowering medications which are also increasingly recognized to have anti-cancer properties for various cancers, including breast cancer. Most clinical evidence supports a protective effect of statin on reducing breast cancer recurrence, particularly in hormone-receptor positive breast cancers.This study seeks to study the impact of statin use on breast cancer recurrence in an Asian population.

View Article and Find Full Text PDF

Purpose: To retrospectively compare complications for totally implanted venous access devices (TIVADs or ports) in the arm vs. the chest. One participating institution implanted all TIVADs in the arm, whereas the other institution implanted them in the chest.

View Article and Find Full Text PDF

SARS-CoV-2 is a major threat to global health. Here, we investigate the RNA structure and RNA-RNA interactions of wildtype (WT) and a mutant (Δ382) SARS-CoV-2 in cells using Illumina and Nanopore platforms. We identify twelve potentially functional structural elements within the SARS-CoV-2 genome, observe that subgenomic RNAs can form different structures, and that WT and Δ382 virus genomes fold differently.

View Article and Find Full Text PDF

Background: Recent evidence from randomized trials suggests that FOLFOXIRI (fluorouracil, oxaliplatin, and irinotecan) ± bevacizumab is associated with higher response rates, with the potential for conversion of unresectable to resectable disease in metastatic colorectal cancer (mCRC). However, limited evidence is available on the efficacy and safety of this regimen in real-world patients with mCRC. The current study aims to evaluate the conversion rate and safety of FOLFOXIRI ± bevacizumab in real-world patients with unresectable mCRC.

View Article and Find Full Text PDF

Polygenic risk scores (PRS) have been shown to predict breast cancer risk in European women, but their utility in Asian women is unclear. Here we evaluate the best performing PRSs for European-ancestry women using data from 17,262 breast cancer cases and 17,695 controls of Asian ancestry from 13 case-control studies, and 10,255 Chinese women from a prospective cohort (413 incident breast cancers). Compared to women in the middle quintile of the risk distribution, women in the highest 1% of PRS distribution have a ~2.

View Article and Find Full Text PDF

Premise: Plant biodiversity is threatened, yet many species remain undescribed. It is estimated that >50% of undescribed species have already been collected and are awaiting discovery in herbaria. Robust automatic species identification algorithms using machine learning could accelerate species discovery.

View Article and Find Full Text PDF

Although mammography is the gold standard for breast cancer screening, the high rates of false-positive mammograms remain a concern. Thus, there is an unmet clinical need for a non-invasive and reliable test to differentiate between malignant and benign breast lesions in order to avoid subjecting patients with abnormal mammograms to unnecessary follow-up diagnostic procedures. Serum samples from 116 malignant breast lesions and 64 benign breast lesions were comprehensively profiled for 2,083 microRNAs (miRNAs) using next-generation sequencing.

View Article and Find Full Text PDF

Objectives: The aim of this study was to compare the efficacy and safety of FOLFIRINOX (5-FU/leucovorin, irinotecan, and oxaliplatin) and gemcitabine/nab-paclitaxel (GnP) in patients with advanced pancreatic cancer.

Methods: Patients with newly diagnosed advanced pancreatic cancer in Saskatchewan, Canada, from 2011 to 2016, who received FOLFIRINOX or GnP were assessed. A Cox proportional multivariate analysis was performed to evaluate prognostic variables.

View Article and Find Full Text PDF

Introduction: Fixing the two-part Mason II radial head fracture using screws is becoming a popular practice. However, the screw fixation efficacy for three-part Mason III and IV fractures is controversial. The purpose of this study is to determine the effectiveness of using a uniform technique of headless compression screw fixation in simple, isolated Mason II and complex three-part Mason III and IV radial head fractures in terms of functional outcome, treatment efficiency and assessment of complications with the procedure.

View Article and Find Full Text PDF

Hypoglycemia is a well-established paraneoplastic manifestation of hepatocellular carcinoma (HCC). However, hypoglycemia presenting as the primary presentation of HCC is extremely rare. Most cases are resistant to glucose infusion and may lead to severe complications such as hypoglycemic seizures.

View Article and Find Full Text PDF

Post endoscopic retrograde cholangiopancreatography (ERCP) pancreatic panniculitis is a rare condition caused by fat necrosis following release of pancreatic enzymes into the bloodstream. No previous reports of pancreatic panniculitis have been reported in post-liver transplant subjects undergoing ERCP. We present a 63-year-old cryptogenic cirrhotic female post-cadaveric liver transplant who underwent ERCP for suspected biliary stricture and subsequently developed pancreatic panniculitis.

View Article and Find Full Text PDF

An 81-year-old woman was referred for cardiac computed tomography-angiography (CCTA) after an extracardiac mass was found on echocardiography. CCTA found a giant atherosclerotic right coronary artery aneurysm with a maximal diameter of 80 mm, which was compressing the right atrium and right appendage, proximal superior vena cava, right ventricle inlet and tricuspid annulus.

View Article and Find Full Text PDF

A group of flavanones and their chalcones, isolated from Boesenbergia rotunda L., were previously reported to show varying degrees of noncompetitive inhibitory activities toward Dengue virus type 2 (Den2) protease. Results obtained from automated docking studies are in agreement with experimental data in which the ligands were shown to bind to sites other than the active site of the protease.

View Article and Find Full Text PDF