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Colorectal polyps

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https://www.readbyqxmd.com/read/27909808/clinical-validation-of-a-novel-urine-based-metabolomic-test-for-the-detection-of-colonic-polyps-on-chinese-population
#1
Lu Deng, Hong Fang, Victor K Tso, Yuanyuan Sun, Rae R Foshaug, Spencer C Krahn, Fen Zhang, Yujie Yan, Huilin Xu, David Chang, Yong Zhang, Richard N Fedorak
PURPOSE: Colorectal cancer is the fifth leading cause of cancer-related deaths in China. When detected early, with the removal of adenomatous polyps, precursors of colorectal cancer, it is preventable. The aim of this study was to evaluate a novel urine-based metabolomic diagnostic test for the detection of adenomatous polyps, PolypDx™, that was originally developed and validated using 1000 samples from Canadian Cohort, on Chinese population. METHODS: Prospective urine samples were collected from 1000 participants undergoing colonoscopy examination, from March 2013 to July 2014 at Minhang District, Shanghai Centre for Disease Control and Prevention...
December 1, 2016: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/27902488/what-influences-preneoplastic-colorectal-lesion-recurrence
#2
REVIEW
Giulia De Maio, Elisa Zama, Claudia Rengucci, Daniele Calistri
The hypothesis of the local recurrence of preneoplastic lesions was first put forward in the 1950s. Disease recurrence may result from an inherent imbalance in cell proliferation that promotes carcinogenesis in apparently normal mucosa. Our review sheds light on how early preneoplastic lesions could be used to diagnose relapsed preneoplastic and, developing neoplastic lesions. We focus in detail on the clinical-pathological and molecular features of adenoma subtypes and their role in relapsed adenoma and their development into colorectal carcinoma...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27896421/multiple-behavioral-factors-are-associated-with-occurrence-of-large-flat-colorectal-polyps
#3
Tianzuo Zhan, Felix Hahn, Thomas Hielscher, Asmé Bilge, Jürgen Grüger, Jürgen Weers, Johannes Betge, Timo Gaiser, Georg Kähler, Matthias P Ebert, Sebastian Belle
PURPOSE: The prevalence of advanced dysplasia and synchronous lesions is particularly high in patients with large, flat colorectal polyps. However, the impact of lifestyle on the development of such polyps is poorly investigated. Hence, this study aims to identify associations between behavioral factors and the occurrence of large, flat colorectal polyps. METHODS: Behavioral factors were retrospectively analyzed in patients with large, flat polyps and control patients with at most one diminutive polyp...
November 28, 2016: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/27893377/high-performance-cad-ctc-scheme-using-shape-index-multiscale-enhancement-filters-and-radiomic-features
#4
Yacheng Ren, Jingchen Ma, Junfeng Xiong, Lin Lu, Jun Zhao
OBJECTIVE: Computer-aided detection (CAD) systems for computed tomography colonography (CTC) can automatically detect colorectal polyps. The main problem of currently developed CAD-CTC systems is the numerous false positives (FPs) caused by the existence of complicated colon structures (e.g., haustral fold, residual fecal material, inflation tube, and ileocecal valve). This study proposes a CAD-CTC scheme using shape index, multiscale enhancement filters, and radiomic features to address the FP issue...
November 22, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27889548/impact-of-physician-adherence-to-colonoscopy-surveillance-guidelines-on-interval-colon-cancer
#5
Jennifer Nayor, John R Saltzman, Emily J Campbell, Molly L Perencevich, Kunal Jajoo, James M Richter
BACKGROUND AND AIMS: Interval colorectal cancer (iCRC) incidence is the criterion standard benchmark for measuring the effectiveness of colonoscopy. Colonoscopy surveillance guidelines are designed to minimize iCRC cases. Our aims were to (1) describe characteristics of iCRC patients; and (2) assess if development of iCRC is related to colonoscopy surveillance guideline intervals. METHODS: We performed a retrospective cohort study of post-colonoscopy iCRC cases in a large healthcare system...
November 23, 2016: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27888868/novel-findings-in-colorectal-polyp-surveillance
#6
Sabela Carballal
Colorectal adenomas and serrated polyps are the best characterised premalignant lesions involved in the development of colorectal cancer (CRC). Therefore, the identification and removal of these lesions, as well as post-polypectomy surveillance of affected patients, are key goals in the field of CRC prevention. Current post-polypectomy surveillance strategies differ among the various scientific societies and have several limitations that hamper their application in clinical practice. First, current surveillance intervals are based only on polyp characteristics, excluding other potential clinical conditions, such as diabetes or metabolic syndrome...
September 2016: Gastroenterología y Hepatología
https://www.readbyqxmd.com/read/27888090/rationale-and-design-of-mi-care-the-mile-square-colorectal-cancer-screening-awareness-and-referral-and-education-project
#7
Joanna Buscemi, Yazmin San Miguel, Lisa Tussing-Humphreys, Elizabeth A Watts, Marian L Fitzgibbon, Karriem Watson, Robert A Winn, Kameron L Matthews, Yamile Molina
Although colorectal cancer (CRC) is largely preventable through identification of pre-cancerous polyps through various screening modalities, morbidity and mortality rates remain a challenge, especially in African-American, Latino, low-income and uninsured/underinsured patients. Barriers to screening include cost, access to health care facilities, lack of recommendation to screen, and psychosocial factors such as embarrassment, fear of the test, anxiety about testing preparation and fear of a cancer diagnosis...
November 22, 2016: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/27884518/multi-target-stool-dna-test-clinical-performance-and-impact-on-yield-and-quality-of-colonoscopy-for-colorectal-cancer-screening
#8
David H Johnson, John B Kisiel, Kelli N Burger, Douglas W Mahoney, Mary E Devens, David A Ahlquist, Seth Sweetser
BACKGROUND & AIMS: Multi-target stool DNA testing (MT-sDNA) is now FDA-approved for average-risk CRC screening. Trials leading to its approval used blinded colonoscopy as the reference standard. In the post-approval screen setting, the clinical performance and impact of MT-sDNA on unblinded colonoscopy has not been described. We measured the impact that knowledge of a positive MT-sDNA test result has on colonoscopy yield and quality. METHODS: The unblinded group comprised all patients with positive MT-sDNA results on screening from 9/1/14-9/30/15 at a single tertiary center...
November 21, 2016: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27881836/relationship-between-lesions-in-adenomatous-polyp-dysplasia-colorectal-cancer-sequence-and-neutrophil-to-lymphocyte-ratio
#9
Feyzullah Uçmak, Elif Tuğba Tuncel
BACKGROUND The aim of our study was to evaluate all lesions in the adenoma-dysplasia-cancer sequence of the colon and to examine whether the neutrophil-to-lymphocyte ratio (NLR) can distinguish polyps indicating dysplasia and cancer. MATERIAL AND METHODS A total of 397 patients who had colonoscopic polypectomy between January 2010 and December 2014 were included in our retrospective study. The patients were divided into four groups: patients with hyperplastic polyps, patients with adenomatous polyps, patients with dysplasia, and patients with cancer...
November 24, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27866157/loss-of-free-fatty-acid-receptor-2-enhances-colonic-adenoma-development-and-reduces-the-chemopreventive-effects-of-black-raspberries-in-apcmin-mice
#10
Pan Pan, Chad W Skaer, Hsin-Tzu Wang, Kiyoko Oshima, Yi-Wen Huang, Jianhua Yu, Jianying Zhang, Martha Yearsley, Kimberle Agle, William Drobyski, Xiao Chen, Li-Shu Wang
We previously showed that black raspberries (BRBs) have beneficial effects in human colorectal cancer and a mouse model of colorectal cancer (Apc(Min/+)). The current study investigated the role of free fatty acid receptor 2 (FFAR2) in colon carcinogenesis and whether the FFAR2 signaling pathway contributes to BRB-mediated chemoprevention in mice. FFAR2 (also named GPR43) is a member of the G-protein-coupled receptor family that is expressed in leukocytes and colon. Apc(Min/+) and Apc(Min/+)-FFAR2(-/-) mice were given a control diet or the control diet supplemented with 5% BRBs for 8 weeks...
November 19, 2016: Carcinogenesis
https://www.readbyqxmd.com/read/27864292/clinical-efficacy-of-fecal-occult-blood-test-and-colonoscopy-for-dasatinib-induced-hemorrhagic-colitis-in-cml-patients
#11
Satoshi Nishiwaki, Matsuyoshi Maeda, Masahiro Yamada, Shingo Okuno, Yasuhiko Harada, Kotaro Suzuki, Shingo Kurahashi, Fumihiro Urano, Shozo Okamura, Isamu Sugiura
A positive fecal occult blood test (FOBT) is occasionally observed in some chronic myeloid leukemia (CML) patients treated with a tyrosine kinase inhibitor (TKI), and hemorrhagic colitis in patients treated with dasatinib has been reported. To clarify the frequency of TKI-induced hemorrhagic colitis and the screening efficacy of an FOBT followed by a colonoscopy, we prospectively enrolled CML patients treated with a TKI. FOBTs were performed in all patients and colonoscopy was performed in patients with positive FOBTs...
November 18, 2016: Blood
https://www.readbyqxmd.com/read/27864128/prostaglandin-e2-activates-yap-and-a-positive-signaling-loop-to-promote-colon-regeneration-following-colitis-but-also-carcinogenesis-in-mice
#12
Han-Byul Kim, Minchul Kim, Young-Soo Park, Intae Park, Tackhoon Kim, Sung-Yeun Yang, Charles J Cho, DaeHee Hwang, Jin-Hak Jung, Sanford D Markowitz, Sung Wook Hwang, Suk-Kyun Yang, Dae-Sik Lim, Seung-Jae Myung
BACKGROUND & AIMS: Prostaglandin E2 (PGE2) is mediator of inflammation that regulates tissue regeneration, but its continual activation has been associated with carcinogenesis. Little is known about factors in the PGE2 signaling pathway that contribute to tumor formation. We investigated whether yes associated protein 1 (YAP1), a transcriptional co-activator in the Hippo signaling pathway, mediates PGE2 function. METHODS: DLD-1 and SW480 colon cancer cell lines were transfected with vectors expressing transgenes or small hairpin RNAs and incubated with recombinant PGE2, with or without pharmacologic inhibitors of signaling proteins, and analyzed by immunoblot, immunofluorescence, quantitative reverse transcription PCR, transcriptional reporter, and proliferation assays...
November 15, 2016: Gastroenterology
https://www.readbyqxmd.com/read/27860102/high-prevalence-of-sessile-serrated-adenomas-in-contemporary-outpatient-colonoscopy-practice
#13
Mark Bettington, Neal Walker, Tony Rahman, Ann Vandeleur, Vicki Whitehall, Barbara Leggett, John Croese
BACKGROUND: Sessile serrated adenomas are the polyp precursor of 15-20% of colorectal carcinomas. There is debate about their prevalence and increasing discussion about the need for a serrated polyp detection rate as a quality indicator for colonoscopy. AIMS: We aimed to assess the prevalence of sessile serrated adenomas at an outpatient gastroenterology service. METHODS: This is a retrospective study of an unselected consecutive series of patients who had an outpatient colonoscopy between April 2013 and May 2014...
November 16, 2016: Internal Medicine Journal
https://www.readbyqxmd.com/read/27859949/the-clinicopathological-significance-of-spc18-in-colorectal-cancer-spc18-participates-in-tumor-progression
#14
Takuya Hattori, Kazuhiro Sentani, Naohide Oue, Naoya Sakamoto, Wataru Yasui
Colorectal cancer (CRC) is one of the leading causes of cancer-related death worldwide. In order to identify novel prognostic markers or therapeutic targets for CRC, we searched for candidate genes in our comprehensive gene expression libraries, and focused on SEC11A, which encodes the SPC18 protein. SPC18 plays a key role in the endoplasmic reticulum-Golgi secretory pathway and presumably regulates the secretion of various secretory proteins. An immunohistochemical analysis of SPC18 in 137 CRC tissue samples demonstrated that 79 (58%) CRC cases were positive for SPC18...
November 17, 2016: Cancer Science
https://www.readbyqxmd.com/read/27852946/non-alcoholic-fatty-liver-disease-and-colorectal-cancer
#15
REVIEW
I Mikolasevic, L Orlic, D Stimac, I Hrstic, I Jakopcic, S Milic
As a significant cause of cancer death worldwide, colorectal cancer (CRC) is still one of the most common cancers in the world. The most efficient strategies to reduce CRC incidence include identifying risk factors for CRC and performing a preventive colonoscopy in high-risk populations. Some well-established risk factors for CRC development include hereditary syndromes and inflammatory bowel disease. Of note, in recent years, attention has been given to new evidence indicating that more than 75%-95% of CRC occurs in individuals with little or no genetic risk...
November 16, 2016: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/27852795/modifiable-lifestyle-factors-associated-with-risk-of-sessile-serrated-polyps-conventional-adenomas-and-hyperplastic-polyps
#16
James R Davenport, Timothy Su, Zhiguo Zhao, Helen G Coleman, Walter E Smalley, Reid M Ness, Wei Zheng, Martha J Shrubsole
OBJECTIVE: To identify modifiable factors associated with sessile serrated polyps (SSPs) and compare the association of these factors with conventional adenomas (ADs) and hyperplastic polyps (HPs). DESIGN: We used data from the Tennessee Colorectal Polyp Study, a colonoscopy-based case-control study. Included were 214 SSP cases, 1779 AD cases, 560 HP cases and 3851 polyp-free controls. RESULTS: Cigarette smoking was associated with increased risk for all polyps and was stronger for SSPs than for ADs (OR 1...
November 15, 2016: Gut
https://www.readbyqxmd.com/read/27844202/does-routine-colonoscopy-help-diagnose-familial-adenomatous-polyposis-in-patients-presenting-with-desmoid-tumors-but-no-gastrointestinal-symptoms
#17
Rumi Shin, Hwan-Seong Cho, Duck-Woo Kim, So Yeon Ahn, Myong Hoon Ihn, Hyo Jin Park, Heung-Kwon Oh, Sung-Bum Kang
PURPOSE: Desmoid tumor (DT) is a rare myofibroblastic proliferative neoplasm, but can occur in up to 26% of patients with familial adenomatous polyposis (FAP). Therefore, DT may be an extraintestinal manifestation of FAP that precedes the development of advanced malignancies. The aim of this study was to identify the incidence of polyps in DT patients and investigate value of colonoscopy for diagnosis of FAP in DT patients without gastrointestinal symptoms. MATERIALS AND METHODS: The records of patients diagnosed with DT were retrospectively reviewed using the clinical data warehouse (CDW) system...
November 14, 2016: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/27837459/endoscopic-mucosal-resection-in-elderly-patients
#18
Stefano Pontone, Rossella Palma, Cristina Panetta, Daniele Pironi, Chiara Eberspacher, Rita Angelini, Paolo Pontone, Antonio Catania, Angelo Filippini, Salvatore Sorrenti
BACKGROUND: Endoscopic mucosal resection (EMR) of early superficial colorectal carcinomas is nowadays accepted as the gold standard treatment for this type of neoplasia. AIM: This study aims to evaluate the efficacy and safety of mucosectomy in elderly patients considering the predictive value of submucosal infiltration. METHODS: A retrospective study of all patients referred for EMR of sessile colorectal polyps classified IIa by the Paris classification between April 2013 and April 2015...
November 11, 2016: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/27833952/narrow-band-imaging-with-near-focus-mode-for-colorectal-polyps-characterization
#19
Adriana Mihaela Ciocâlteu, Elena Tatiana CârŢână, Dan Nicolae Florescu, Ioana Andreea Gheonea, IonuŢ Mădălin Troponete, Tudorel Ciurea, Dan IonuŢ Gheonea
Conventional white light endoscopy is far from being an ideal tool to detect, characterize, and confirm the nature of colorectal lesions in order to indicate targeted biopsies or polyp resections only when necessary. Minimally invasive imaging techniques have gradually emerged to reveal previously unseen abnormalities to the operator during endoscopic examination. In this respect, technology and applications of narrow band imaging (NBI) are rapidly evolving. Magnification using NBI with near-focus mode has been introduced recently to enable closer examination under the control of a single button...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27829682/type-and-frequency-of-mutyh-variants-in-italian-patients-with-suspected-map-a-retrospective-multicenter-study
#20
Maria Teresa Ricci, Sara Miccoli, Daniela Turchetti, Davide Bondavalli, Alessandra Viel, Michele Quaia, Elisa Giacomini, Viviana Gismondi, Lupe Sanchez-Mete, Vittoria Stigliano, Aline Martayan, Filomena Mazzei, Margherita Bignami, Luigina Bonelli, Liliana Varesco
To determine prevalence, spectrum and genotype-phenotype correlations of MUTYH variants in Italian patients with suspected MAP (MUTYH-associated polyposis), a retrospective analysis was conducted to identify patients who had undergone MUTYH genetic testing from September 2002 to February 2014. Results of genetic testing and patient clinical characteristics were collected (gender, number of polyps, age at polyp diagnosis, presence of colorectal cancer (CRC) and/or other cancers, family data). The presence of large rearrangements of the MUTYH gene was evaluated by Multiplex Ligation-dependent Probe Amplification analysis...
November 10, 2016: Journal of Human Genetics
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