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Sessile serrated polyps

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https://www.readbyqxmd.com/read/28430953/gastric-proteins-muc5ac-and-tff1-as-potential-diagnostic-markers-of-colonic-sessile-serrated-adenomas-polyps
#1
Magomed Khaidakov, Keith K Lai, D Roudachevski, Julietta Sargsyan, Hannah E Goyne, Rish K Pai, Laura W Lamps, Curt H Hagedorn
Objectives: A subset of colon cancers originates from sessile serrated adenomas/polyps (SSA/Ps). Our goal was to identify markers for SSA/Ps that could aid in distinguishing them from hyperplastic polyps (HPs). Methods: We performed immunostaining for gastric proteins MUC5AC and TFF1 in formalin-fixed, paraffin-embedded (FFPE) samples of HPs (n = 47), SSA/Ps (n = 37), and normal colon (n = 30). Results: Control mucosa expressed only trace amounts of MUC5AC and TFF1...
November 1, 2016: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28424049/findings-in-young-adults-at-colonoscopy-from-a-hospital-service-database-audit
#2
Stephanie Wong, Ilmars Lidums, Christophe Rosty, Andrew Ruszkiewicz, Susan Parry, Aung Ko Win, Yoko Tomita, Sina Vatandoust, Amanda Townsend, Dainik Patel, Jennifer E Hardingham, David Roder, Eric Smith, Paul Drew, Julie Marker, Wendy Uylaki, Peter Hewett, Daniel L Worthley, Erin Symonds, Graeme P Young, Timothy J Price, Joanne P Young
BACKGROUND: Colorectal cancer (CRC) diagnosed at <50 years is predominantly located in the distal colon and rectum. Little is known about which lesion subtypes may serve as CRC precursors in young adults. The aim of this work was to document the prevalence and histological subtype of lesions seen in patients aged <50 years, and any associated clinical features. METHODS: An audit of the colonoscopy database at The Queen Elizabeth Hospital in Adelaide, South Australia over a 12-month period was undertaken...
April 19, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28367494/comparison-of-the-diagnostic-ability-of-blue-laser-imaging-magnification-versus-pit-pattern-analysis-for-colorectal-polyps
#3
Arihiro Nakano, Yoshiki Hirooka, Takeshi Yamamura, Osamu Watanabe, Masanao Nakamura, Kohei Funasaka, Eizaburo Ohno, Hiroki Kawashima, Ryoji Miyahara, Hidemi Goto
Background and study aims There have been few evaluations of the diagnostic ability of new narrow band light observation blue laser imaging (BLI). The present prospective study compared the diagnostic ability of BLI magnification and pit pattern analysis for colorectal polyps. Patients and methods We collected lesions prospectively, and the analysis of images was made by two endoscopists, retrospectively. A total of 799 colorectal polyps were examined by BLI magnification and pit pattern analysis at Nagoya University Hospital...
April 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28365356/impact-of-cap-assisted-colonoscopy-on-detection-of-proximal-colon-adenomas-systematic-review-and-meta-analysis
#4
REVIEW
Madhav Desai, Andre Sanchez-Yague, Abhishek Choudhary, Asad Pervez, Neil Gupta, Prashanth Vennalaganti, Sreekar Vennelaganti, Alessandro Fugazza, Alessandro Repici, Cesare Hassan, Prateek Sharma
BACKGROUND AND AIMS: Proximal colon adenomas can be missed during routine colonoscopy. Use of a cap or hood on tip of the colonoscope has shown to improve overall adenoma detection with variable rates. However, it has not been systematically evaluated for detection of proximal colon or right-sided adenomas where the cap may have maximum impact on adenoma detection rate (ADR). Our aim was to perform a systematic review and meta-analysis to evaluate the impact of cap colonoscopy (CC) on right-sided adenoma detection rates (r-ADR) compared with standard colonoscopy (SC)...
March 29, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28341823/a-case-with-serrated-polyposis-syndrome-controlled-by-multiple-applications-of-endoscopic-mucosal-resection-and-endoscopic-submucosal-dissection
#5
Daisuke Suzuki, Satohiro Matsumoto, Hirosato Mashima
BACKGROUND Serrated polyposis syndrome (SPS) is characterized by numerous hyperplastic polyps and sessile serrated adenoma/polyp (SSA/P) in the large intestine. SSA/P is known to transform into malignant lesions through the serrated pathway instead of the adenoma-carcinoma sequence. Early diagnosis with lower gastrointestinal endoscopy and early treatment are now considered to be essential. CASE REPORT We had an experience with a case of SPS to which endoscopic treatment was applied in multiple sessions. Endoscopic treatment was performed for 16 lesions in total, and the pathological findings were SSA/P for 15 and adenoma for the other lesion...
March 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28325827/sessile-serrated-polyps-and-colon-cancer-prevention
#6
Shahrooz Rashtak, Rafaela Rego, Seth R Sweetser, Frank A Sinicrope
Evidence suggests that up to one fifth of colorectal carcinomas (CRC) develop from serrated polyps, named for their pattern of colonic crypts, and include the sessile serrated adenoma/polyp (SSA/P) that has malignant potential. SSA/Ps are typically located in the proximal colon and have molecular features of hypermethylation of CpG islands in gene promoters and activating point mutations (V600E) in the BRAF oncogene. Both of these features are seen in sporadic CRCs with microsatellite instability (MSI) which is potentially consistent with an origin of these cancers from precursor SSA/Ps...
March 21, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/28320200/clinical-and-biological-features-of-interval-colorectal-cancer
#7
Yu Mi Lee, Kyu Chan Huh
Interval colorectal cancer (I-CRC) is defined as a CRC diagnosed within 60 months after a negative colonoscopy, taking into account that 5 years is the "mean sojourn time." It is important to prevent the development of interval cancer. The development of interval colon cancer is associated with female sex, old age, family history of CRC, comorbidities, diverticulosis, and the skill of the endoscopist. During carcinogenesis, sessile serrated adenomas/polyps (SSA/Ps) share many genomic and colonic site characteristics with I-CRCs...
March 21, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28315031/feasibility-of-large-scale-identification-of-sessile-serrated-polyp-patients-using-electronic-records-a-utah-study
#8
Kajsa Affolter, Keith Gligorich, Niloy Jewel Samadder, Wade S Samowitz, Karen Curtin
BACKGROUND/AIMS: The serrated pathway accounts for 15-25% of sporadic colorectal cancer (CRC). In our study, we sought to accurately characterize sessile serrated polyps (SSP) in a population by electronically interrogating colonoscopy patients' endoscopy and pathology reports using a rules-based text search of pre-defined SSP-related terms. To this aim, we compared a sample of putative SSP and hyperplastic polyps (HP) using our algorithm to a determination of SSP or HP by pathologist and molecular examination to determine the feasibility of large-scale identification of SSP in electronic medical records...
March 17, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28302537/mcm2-expression-in-serrated-polyps-demonstrates-aberrant-cellular-proliferation
#9
Danielle Fortuna, Bruce Boman, Raymond O'Neil, Juan Palazzo
In normal colonic epithelium, the proliferative zone is limited to the lower half of the colonic crypt. Evaluating the changes in the colonic epithelial proliferation can be useful in understanding pathophysiology of various diseases. Our aim was to investigate the proliferative compartment of serrated polyps (SPs) using MCM2, a protein involved in DNA replication, and assess for changes along the SP spectrum. Immunohistochemistry was performed on serrated polyps (16 microvesicular-type hyperplastic polyps (HP), 58 sessile serrated adenomas (SSA), seven SSAs with dysplasia) and six sections of normal colon using anti-MCM2 antibody...
March 13, 2017: Human Pathology
https://www.readbyqxmd.com/read/28295004/-serrated-adenomas-of-the-colon-clinical-morphological-and-molecular-genetic-characteristics
#10
L M Mikhaleva, R A Komleva, A E Biryukov, N K Shakhpazyan
AIM: to investigate the clinical, morphological, and molecular genetic characteristics of serrated adenomas of the colon. MATERIAL AND METHODS: The study included 82 colon adenomas from 63 patients aged 29 to 81 years, who underwent colonoscopy with biopsy or polypectomy. The mean age of men was 63.3 years; that of women was 56.8 years. Comprehensive clinical, morphological, immunohistochemical, and molecular genetic examinations were made. RESULTS: The histological examination showed that sessile serrated adenomas (SSA) of the colon were most common (46...
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/28279681/lipoma-of-the-colon-with-a-sessile-serrated-adenoma-polyp-and-adenocarcinoma
#11
Stijn J B Van Weyenberg, Danny Goudkade
No abstract text is available yet for this article.
February 24, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28277895/serrated-polyps-a-concealed-but-prevalent-precursor-of-colorectal-cancer
#12
Henrik Thorlacius, Yoji Takeuchi, Takashi Kanesaka, Otto Ljungberg, Noriya Uedo, Ervin Toth
Serrated polyps have long been considered to lack malignant potential but accumulating data suggest that these lesions may cause up to one-third of all sporadic colorectal cancer. Serrated polyps are classified into three subtypes, including sessile serrated adenomas/polyps (SSA/Ps), traditional serrated adenomas (TSAs), and hyperplastic polyps (HPs). SSA/P and TSA harbour malignant potential but TSA represents only 1-2%, wheras SSA/P constitute up to 20% of all serrated lesions. HPs are most common (80%) of all serrated polyps but are considered to have a low potential of developing colorectal cancer...
June 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28267853/sessile-serrated-polyps-and-colorectal-cancer-reply
#13
LETTER
David Lieberman
No abstract text is available yet for this article.
March 7, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28267850/sessile-serrated-polyps-and-colorectal-cancer
#14
LETTER
Seth D Crockett
No abstract text is available yet for this article.
March 7, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28260946/the-clinical-impact-of-serrated-colorectal-polyps
#15
REVIEW
Brendon M O'Connell, Seth D Crockett
Serrated polyps (SPs) of the colorectum pose a novel challenge to practicing gastroenterologists. Previously thought benign and unimportant, there is now compelling evidence that SPs are responsible for a significant percentage of incident colorectal cancer worldwide. In contrast to conventional adenomas, which tend to be slow growing and polypoid, SPs have unique features that undermine current screening and surveillance practices. For example, sessile serrated polyps (SSPs) are flat, predominately right-sided, and thought to have the potential for rapid growth...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28257790/the-diagnostic-performance-of-jnet-classification-for-differentiation-among-noninvasive-superficially-invasive-and-deeply-invasive-colorectal-neoplasia
#16
Kyoku Sumimoto, Shinji Tanaka, Kenjiro Shigita, Nana Hayashi, Daiki Hirano, Yuzuru Tamaru, Yuki Ninomiya, Shiro Oka, Koji Arihiro, Fumio Shimamoto, Masaharu Yoshihara, Kazuaki Chayama
BACKGROUNDS AND AIMS: The Japan NBI Expert Team (JNET) classification is the first universal narrow-band imaging (NBI) magnifying endoscopic classification of colorectal tumors. Considering each type in this classification, the diagnostic ability of Type 2B is the weakest. Generally, clinical behavior is thought to be different in each gross type of colorectal tumor. We evaluated the differences in the diagnostic performance of JNET classification for each gross type (polypoid and superficial) and examined whether the diagnostic performance of Type 2B could improve by subtyping...
February 28, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28257124/hyper-methylated-loci-persisting-from-sessile-serrated-polyps-to-serrated-cancers
#17
Angeline S Andrew, John A Baron, Lynn F Butterly, Arief A Suriawinata, Gregory J Tsongalis, Christina M Robinson, Christopher I Amos
Although serrated polyps were historically considered to pose little risk, it is now understood that progression down the serrated pathway could account for as many as 15%-35% of colorectal cancers. The sessile serrated adenoma/polyp (SSA/P) is the most prevalent pre-invasive serrated lesion. Our objective was to identify the CpG loci that are persistently hyper-methylated during serrated carcinogenesis, from the early SSA/P lesion through the later cancer phases of neoplasia development. We queried the loci hyper-methylated in serrated cancers within our rightsided SSA/Ps from the New Hampshire Colonoscopy Registry, using the Illumina Infinium Human Methylation 450 k panel to comprehensively assess the DNA methylation status...
March 2, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28193491/linked-color-imaging-improves-endoscopic-visibility-of-colorectal-nongranular-flat-lesions
#18
Takuto Suzuki, Taro Hara, Yoshiyasu Kitagawa, Hideyuki Takashiro, Rino Nankinzan, Osamu Sugita, Taketo Yamaguchi
BACKGROUND AND AIMS: As a newly developed image-enhanced endoscopy (IEE) technique, linked-color imaging (LCI) provides very bright images with enhanced color tones. With the objective of improving the detection rate of colorectal flat tumor lesions, which are difficult to detect, we examined the usefulness of LCI from the viewpoint of visibility. METHODS: Fifty-three consecutive nongranular flat tumors were used in this study. Endoscopic images were acquired by white-light imaging (WLI), blue-laser imaging (BLI)-bright, and LCI modes...
February 11, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28182112/prevalence-and-anatomic-distribution-of-serrated-and-adenomatous-lesions-in-patients-with-inflammatory-bowel-disease
#19
Lik Hang Lee, Marietta Iacucci, Miriam Fort Gasia, Subrata Ghosh, Remo Panaccione, Stefan Urbanski
Background. Sessile serrated adenomas/polyps (SSA/Ps) and traditional serrated adenomas (TSAs) have not been well characterized in patients with inflammatory bowel disease (IBD). This study assesses the prevalence and anatomic distribution of SSA/Ps, TSAs, and conventional adenomas/dysplasia (Ad/Ds) in IBD patients. Methods. IBD patients with serrated, adenomatous, or hyperplastic lesions between 2005 and 2009 were identified in the regional tertiary-care hospital database. Clinicopathological information was reviewed and the histology of biopsies was reevaluated...
2017: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28160332/histopathological-analysis-of-cold-snare-polypectomy-and-its-indication-for-colorectal-polyps-10-14mm-in-diameter
#20
Ryohei Hirose, Naohisa Yoshida, Takaaki Murakami, Kiyoshi Ogiso, Yutaka Inada, Osamu Dohi, Tetsuya Okayama, Kazuhiro Kamada, Kazuhiko Uchiyama, Osamu Handa, Takeshi Ishikawa, Hideyuki Konishi, Yuji Naito, Yasuko Fujita, Mitsuo Kishimoto, Akio Yanagisawa, Yoshito Itoh
BACKGROUND AND AIM: Cold snare polypectomy (CSP) is commonly used for treating colorectal polyps <10 mm in diameter. We evaluated the histopathological and safety of CSP for larger polyps. METHODS: We retrospectively analyzed 1,006 colorectal polyps resected with CSP. The indication for CSP was polyps 2-14 mm that were diagnosed as benign neoplastic polyp by magnifying endoscopy. Various clinicopathological characteristics were analyzed. Multivariate analyses were utilized to determine the independent risk factors for failure of complete CSP resection...
February 3, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
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