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Colorectal dysplasia

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https://www.readbyqxmd.com/read/28631086/nearly-a-third-of-high-grade-dysplasia-and-colorectal-cancer-is-undetected-in-patients-with-inflammatory-bowel-disease
#1
Swathi Eluri, Alyssa M Parian, Berkeley N Limketkai, Christina Y Ha, Steven R Brant, Sharon Dudley-Brown, Jonathan E Efron, Sandy G Fang, Susan L Gearhart, Michael R Marohn, Stephen J Meltzer, Safar Bashar, Brindusa Truta, Elizabeth A Montgomery, Mark G Lazarev
BACKGROUND: It is unclear whether intensive surveillance protocols have resulted in a decreased incidence of colorectal cancer (CRC) in inflammatory bowel disease (IBD). AIMS: To determine the prevalence and characteristics of IBD associated high-grade dysplasia (HGD) or CRC that was undetected on prior colonoscopy. METHODS: This is a single-center, retrospective study from 1994 to 2013. All participants had a confirmed IBD diagnosis and underwent a colectomy with either HGD or CRC found in the colectomy specimen...
June 19, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28614199/wnt-pathway-gene-mutations-are-associated-with-the-presence-of-dysplasia-in-colorectal-sessile-serrated-adenoma-polyps
#2
Taiki Hashimoto, Satoshi Yamashita, Hiroshi Yoshida, Hirokazu Taniguchi, Toshikazu Ushijima, Tesshi Yamada, Yutaka Saito, Atsushi Ochiai, Shigeki Sekine, Nobuyoshi Hiraoka
Sessile serrated adenoma/polyps (SSA/Ps) are believed to be the major precursor of serrated pathway-derived colorectal carcinomas. To better characterize the process of progression from SSA/Ps to carcinomas, we analyzed 46 SSA/Ps with dysplasia and 45 SSA/Ps without dysplasia using targeted next-generation sequencing and immunohistochemistry. Among the WNT pathway genes analyzed, protein-truncating mutations of RNF43, APC, and ZNRF3 were identified in 23 (50%), 4 (9%), and 3 (7%) SSA/Ps with dysplasia, respectively...
June 13, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28611980/there-is-no-role-for-colonoscopy-after-diverticulitis-among-asian-patients-less-than-50-years-of-age
#3
Dedrick Kok Hong Chan, Ker-Kan Tan
BACKGROUND: Colonoscopy is advocated following acute diverticulitis to ensure that malignancy is not missed. In an Asian population, diverticulitis is more common in the right colon and in younger patients. The purpose of this study is to examine the utility of colonoscopy amongst Asian patients <50 years of age who have had colonic diverticulitis. METHODS: A retrospective review of all patients aged 50 years and under who were treated for colonic diverticulitis between 2012 and 2014 was performed...
March 2017: Gastrointestinal Tumors
https://www.readbyqxmd.com/read/28586045/low-htra1-expression-in-patients-with-long%C3%A2-standing-ulcerative-colitis-and-colorectal-cancer
#4
Emma Altobelli, Giovanni Latella, Manrico Morroni, Caterina Licini, Giovanni Tossetta, Roberta Mazzucchelli, Valerio F Profeta, Gino Coletti, Pietro Leocata, Mario Castellucci, Mario Guerrieri, Reimondo Petrocelli, Berardo De Berardis, Marina De Padova, Gabriella Di Leonardo, Antonella Paladini, Filippo Mignosi, Gina Quaglione, Roberto Fagnano, Daniela Marzioni
The association between inflammatory bowel disease (IBD) and colorectal cancer (CRC) is being increasingly investigated. HtrA1 overexpression inhibits cell growth and proliferation by influencing apoptosis, invasiveness and migration of tumour cells. In the present study, HtrA1 expression was analysed in 228 colon tissue samples from patients with CRC, adenoma with high-grade dysplasia (AHD), adenoma with low-grade dysplasia (ALD), ulcerative colitis of >10 year duration (UCL), ulcerative colitis of <5 year duration (UCS) and colonic diverticulitis (D), and was compared with its expression in normal colon tissues (NCTs) collected 5 cm from the CRC lesion and in healthy colon mucosa (HC), to establish whether HtrA1 can serve as a biomarker for these conditions...
June 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28566588/limited-identification-of-dual-time-point-positron-emission-tomography-computed-tomography-in-advanced-colorectal-neoplasms
#5
Kazuhiro Kashiwagi, Yoshihiro Nakazato, Mari Arai, Eisuke Iwasaki, Makoto Naganuma, Nagamu Inoue, Yasushi Iwao, Haruhiko Ogata, Koji Murakami, Takanori Kanai
Objective We investigated whether dual-time-point 18-Fluorodeoxyglucose ((18)FDG) positron emission tomography/computed tomography (PET/CT) could improve the positive predictive value for detecting advanced colorectal neoplasms (cancer, adenoma ≥10 mm or adenoma with high-grade dysplasia). Methods We retrospectively searched for consecutive patients with a known primary cancer, who had a colonic (18)FDG uptake incidentally found by PET/CT, followed by colonoscopy between January 2013 and August 2014. The clinical characteristics including the maximum standardized uptake value (SUVmax) were compared between advanced colorectal neoplasms and non-advanced lesions...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28560510/the-role-of-neurotensin-as-a-novel-biomarker-in-the-endoscopic-screening-of-high-risk-population-for-developing-colorectal-neoplasia
#6
Christos Kontovounisios, Shengyang Qiu, Shahnawaz Rasheed, Ara Darzi, Paris Tekkis
Colorectal cancer screening programs aim at early detection of cancer to reduce incidence rates and mortality. The objective of this study is to identify the role of neurotensin in the endoscopic screening of high-risk population for developing colorectal neoplasia. Blood samples from patients referred for urgent colonoscopy to investigate symptoms suspicious of colorectal cancer were collected. Blood neurotensin levels were measured using enzyme-linked immunosorbent assay. Colonoscopy findings were used as reference for determining the diagnostic accuracy of blood neurotensin...
May 30, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28554134/lactobacillus-rhamnosus-atcc-7469-exopolysaccharides-synergizes-with-low-level-ionizing-radiation-to-modulate-signaling-molecular-targets-in-colorectal-carcinogenesis-in-rats
#7
Walid E Zahran, Sawsan M Elsonbaty, Fatma S M Moawed
Combination therapy that targets cellular signaling pathway represents an alternative therapy for the treatment of colon cancer (CRC). The present study was therefore aimed to investigate the probable interaction of Lactobacillus rhamnosus ATCC 7469 exopolysaccharides (EPS) with low level ionizing γ radiation (γ-R) exposure against dimethylhydrazine (DMH)- induced colorectal carcinogenesis in rats. Colon cancer was induced with 20mg DMH/kg BW. Rats received daily by gastric gavage 100mg EPS/Kg BW concomitant with 1Gy γ-R over two months...
May 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28524162/targeted-sequencing-based-analyses-of-candidate-gene-variants-in-ulcerative-colitis-associated-colorectal-neoplasia
#8
Sanjiban Chakrabarty, Vinay Koshy Varghese, Pranoy Sahu, Pradyumna Jayaram, Bhadravathi M Shivakumar, Cannanore Ganesh Pai, Kapaettu Satyamoorthy
BACKGROUND: Long-standing ulcerative colitis (UC) leading to colorectal cancer (CRC) is one of the most serious and life-threatening consequences acknowledged globally. Ulcerative colitis-associated colorectal carcinogenesis showed distinct molecular alterations when compared with sporadic colorectal carcinoma. METHODS: Targeted sequencing of 409 genes in tissue samples of 18 long-standing UC subjects at high risk of colorectal carcinoma (UCHR) was performed to identify somatic driver mutations, which may be involved in the molecular changes during the transformation of non-dysplastic mucosa to high-grade dysplasia...
May 18, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28522954/current-practices-in-endoscopic-submucosal-dissection-for-colorectal-neoplasms-a-survey-of-indications-among-korean-endoscopists
#9
Tae Jun Kim, Eun Ran Kim, Sung Noh Hong, Young-Ho Kim, Dong Kyung Chang
BACKGROUND/AIMS: The indications for colorectal endoscopic submucosal dissection (ESD) vary in clinical practice. To establish colorectal ESD as a standard treatment, standard indications are essential. For establishing standard indications for colorectal ESD, we surveyed the preferences and criteria of endoscopists for colorectal ESD in their practices. METHODS: A multiple-choice questionnaire was sent to 27 members of the Korean Society of Gastrointestinal Endoscopy/ESD group...
April 2017: Intestinal Research
https://www.readbyqxmd.com/read/28510242/riktlinjer-f%C3%A3-r-endoskopisk-kontroll-efter-kolorektal-polypektomi
#10
Henrik Thorlacius, Jan Björk, Åke Öst, Ervin Toth
Endoscopic surveillance after colorectal polypectomy These guidelines for endoscopic surveillance after colorectal polypectomy are based on the recommendations published by European Society of Gastrointestinal Endoscopy (ESGE) in 2013. A precondition for the guidelines is that patients have undergone a high-quality colonoscopy, including complete removal and histopathological evaluation of all detected neoplastic lesions. Current research has made it possible to stratify patients into a low-risk and a high-risk group in terms of metachronous cancer...
May 15, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28507757/risk-of-post-colonoscopy-colorectal-cancer-due-to-incomplete-adenoma-resection-a-nationwide-population-based-cohort-study
#11
Tim Dg Belderbos, Hendrikus Jm Pullens, Max Leenders, Marguerite Ei Schipper, Peter D Siersema, Martijn Gh van Oijen
BACKGROUND: Most post-colonoscopy colorectal cancers (PC-CRCs) are thought to develop from missed or incompletely resected adenomas. AIMS: We aimed to assess the incidence rate of PC-CRC overall and per colorectal segment, as a proxy for PC-CRC due to incomplete adenoma resection, and to identify adenoma characteristics associated with these PC-CRCs. METHODS: We performed a nationwide, population-based cohort study, including all patients with a first colorectal adenoma between 2000-2010 in the Dutch Pathology Registry (PALGA)...
April 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28501592/endoscopic-and-molecular-characterization-of-colorectal-sessile-serrated-adenoma-polyps-with-cytological-dysplasia
#12
Yoshihito Tanaka, Hiro-O Yamano, Eiichiro Yamamoto, Hiro-O Matushita, Hironori Aoki, Kenjiro Yoshikawa, Ryo Takagi, Eiji Harada, Michiko Nakaoka, Yuko Yoshida, Makoto Eizuka, Tamotsu Sugai, Hiromu Suzuki, Hiroshi Nakase
BACKGROUND AND AIMS: Sessile serrated adenoma/polyps (SSA/Ps), which are precursor lesions of colorectal cancer (CRC) with BRAF mutation and the CpG island methylator phenotype (CIMP), develop cytological dysplasia (CD) during the progression of colorectal tumorigenesis. In the present study, we aimed to clarify the endoscopic and molecular signatures of SSA/Ps, with and without CD. METHODS: A series of 208 serrated lesions, including 41 hyperplastic polyps (HPs), 90 SSA/Ps, 33 SSA/Ps with CD and 44 traditional serrated adenomas (TSAs), were observed and resected using magnifying endoscopy...
May 10, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28494577/sessile-serrated-adenomas-how-to-detect-characterize-and-resect
#13
REVIEW
Michael X Ma, Michael J Bourke
Serrated polyps are important contributors to the burden of colorectal cancers (CRC). These lesions were once considered to have no malignant potential, but currently up to 30% of all CRC are recognized to arise from the serrated neoplasia pathway. The primary premalignant lesions are sessile serrated adenomas/polyps (SSA/Ps), although traditional serrated adenomas are relatively uncommon. Compared to conventional adenomas, SSA/Ps are morphologically subtle with indistinct borders, may be difficult to detect endoscopically, are more prevalent than previously thought, are associated with synchronous and metachronous advanced neoplasia, and have a higher risk of incomplete resection...
May 11, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28489751/polyp-missing-rate-and-its-associated-risk-factors-of-referring-hospitals-for-endoscopic-resection-of-advanced-colorectal-neoplasia
#14
Jae Gyu Shin, Hyung Wook Kim, Su Bum Park, Cheol Woong Choi, Dae Hwan Kang, Su Jin Kim, Hyeong Seok Nam, Dae Gon Ryu
Missed polyps are frequently observed in surveillance colonoscopy or referral resection. We evaluated the polyp missing rate and its associated risk factors in patients who were referred to a tertiary hospital for endoscopic resection of advanced colorectal neoplasia.A total of 388 patients with advanced neoplasia who underwent colonoscopy in their referring hospitals and only endoscopic resection without total colonoscopy in Pusan National University Yangsan Hospital from 2009 to 2014 and who underwent surveillance colonoscopy within 6 to 12 months were retrospectively analyzed...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28484082/temporal-and-spatial-changes-of-cells-positive-for-stem-like-markers-in-different-compartments-and-stages-of-human-colorectal-adenoma-carcinoma-sequence
#15
Guanglin Cui, Gang Xu, Li Zhu, Zhigang Pang, Wei Zheng, Zhenfeng Li, Aping Yuan
Considerable evidence supports the idea that stem-like cells may play an essential role during the development of colorectal cancer (CRC). To accomplish this aim, we use immunohistochemistry (IHC) and double IHC with different potential stem-like markers, anti-musashi (Msi), anti-CD133, anti- LGR5 and anti-ALDH1 to examine the presentation of stem-like cells in different compartments including adenoma/CRC epithelium, transitional crypts and tumor stroma in colorectal adenoma and CRC. The results showed that cells positive for stem-like markers were remarkably increased in number and frequently observed in the adenoma/CRC epithelium, transitional crypts and tumor stroma...
April 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28475382/dysplasia-and-colorectal-cancer-surveillance-in-inflammatory-bowel-disease
#16
Samba Siva Reddy Pulusu, Ian C Lawrance
Inflammatory bowel disease (IBD) patients are at an increased risk of developing colorectal cancer (CRC), a devastating complication of which intestinal dysplasia is the precursor. Considerable progress has been made to determine CRC risk in IBD, identification & management of dysplasia and preventative methods. Traditionally, surveillance colonoscopies with random colonic biopsies was used. However recent data suggests that chromoendoscopy is a better method of surveillance. Using 5-aminosalicylic acid agents primarily for chemoprevention is an ongoing debate however, when prescribed along with other strategies to control inflammation, their use is considered of benefit...
May 16, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28470092/the-sept9-gene-methylation-assay-is-capable-of-detecting-colorectal-adenoma-in-opportunistic-screening
#17
Lele Song, Xiumei Peng, Yuemin Li, Wenhua Xiao, Jia Jia, Cheng Dong, Yuan Gong, Guangpeng Zhou, Xiaoliang Han
AIM: This study validated the detection of colorectal adenoma in opportunistic screening using the SEPT9 gene methylation assay. MATERIALS & METHODS: Plasma samples including 85 colorectal cancers, 364 adenomas, 216 hyperplastic polyps, 372 other gastrointestinal diseases and 324 normal subjects, were obtained and tested using the Epi proColon 2.0 CE assay. RESULTS & CONCLUSION: The SEPT9 assay detected 38.7% of all types of adenoma, including 27...
May 4, 2017: Epigenomics
https://www.readbyqxmd.com/read/28450390/british-society-of-gastroenterology-position-statement-on-serrated-polyps-in-the-colon-and-rectum
#18
James E East, Wendy S Atkin, Adrian C Bateman, Susan K Clark, Sunil Dolwani, Shara N Ket, Simon J Leedham, Perminder S Phull, Matt D Rutter, Neil A Shepherd, Ian Tomlinson, Colin J Rees
Serrated polyps have been recognised in the last decade as important premalignant lesions accounting for between 15% and 30% of colorectal cancers. There is therefore a clinical need for guidance on how to manage these lesions; however, the evidence base is limited. A working group was commission by the British Society of Gastroenterology (BSG) Endoscopy section to review the available evidence and develop a position statement to provide clinical guidance until the evidence becomes available to support a formal guideline...
July 2017: Gut
https://www.readbyqxmd.com/read/28449687/expression-and-clinicopathologic-significance-of-tufm-and-p53-for-the-normal-adenoma-carcinoma-sequence-in-colorectal-epithelia
#19
Hong-Qing Xi, Ke-Cheng Zhang, Ji-Yang Li, Jian-Xin Cui, Po Zhao, Lin Chen
BACKGROUND: Evidence indicates that most cases of colorectal carcinoma (CRC) develop from adenoma. A previous study demonstrated that mitochondrial Tu translation elongation factor (TUFM) might serve as an independent prognostic factor for colorectal cancer. However, the expression and function of TUFM in the normal-adenoma-cancer sequence have not been reported. In this study, we investigated the clinicopathologic significance of TUFM and p53 expression for the normal-adenoma-carcinoma sequence in colorectal epithelia and evaluated the roles of TUFM during the progression of colorectal tumors...
April 27, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28434818/expression-of-a-kinase-anchor-protein-13-and-rho-associated-coiled-coil-containing-protein-kinase-in-restituted-and-regenerated-mucosal-epithelial-cells-following-mucosal-injury-and-colorectal-cancer-cells-in-mouse-models
#20
Yumi Kangawa, Toshinori Yoshida, Takeshi Tanaka, Akira Kataoka, Naomi Koyama, Tomoka Ohsumi, Shim-Mo Hayashi, Makoto Shibutani
We demonstrate the expression patterns of A-kinase anchor protein 13 (AKAP13), a scaffold protein that acts upstream of Rho signaling, and Rho-associated coiled-coil containing protein kinase (ROCK) 1/2 in mouse colorectal cancer and during the healing stage of mouse colitis. BALB/c mice received an intraperitoneal injection of azoxymethane at 10mg/kg, followed by two 7-day cycles of 3% dextran sulfate sodium (DSS) administered through their drinking water to induce colon cancer, or a 7-day administration of 4% DSS to induce colitis...
April 20, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
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