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Sessile serrated polyp

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https://www.readbyqxmd.com/read/29909094/how-we-resect-colorectal-polyps-20-mm-in-size
#1
REVIEW
Douglas K Rex, Evelien Dekker
We review our approach to resection of colorectal polyps <20 mm in size. Careful inspection of all lesions is appropriate to assess the type of lesion (adenoma vs serrated) and evaluate the risk of cancer, which is highly associated with lesion size. Polyp resection is in the midst of a "cold revolution," particularly for lesions <10 mm in size, but also for some larger lesions. Cold forceps are sometimes appropriate for 1- to 2-mm lesions that can be engulfed in one bite, but we use cold snaring for almost the entire set of lesions <10 mm...
June 14, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29905309/endoscopic-recognition-of-the-sessile-serrated-polyp-to-cancer-sequence
#2
Nasim Parsa, Douglas K Rex
No abstract text is available yet for this article.
July 2017: VideoGIE: an official video journal of the American Society for Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29876742/helicobacter-pylori-is-associated-with-increased-risk-of-serrated-colonic-polyps-analysis-of-serrated-polyp-risk-factors
#3
Anand Kumar, Mimi Kim, Dana J Lukin
BACKGROUND: Sessile serrated adenomas (SSA) and traditional serrated adenomas (TSA) are recognized precursors of colorectal cancer, but their risk factors are not well established. We investigated the association between Helicobacter pylori infection (HPI) and the development of SSA and TSA. METHODS: Retrospective data were collected on patients aged ≥ 18 years that underwent colonoscopy with biopsy between 2006 and 2016. Based on histology, patients were classified into three groups: those with SSA and/or TSA, (serrated neoplasia group, SN); conventional adenomas only (CA); and with no polyps (NP)...
June 7, 2018: Indian Journal of Gastroenterology: Official Journal of the Indian Society of Gastroenterology
https://www.readbyqxmd.com/read/29805602/endoscopic-analysis-of-colorectal-serrated-lesions-with-cancer
#4
Shuichiro Nagata, Keiichi Mitsuyama, Hiroshi Kawano, Tetsuhiro Noda, Yasuhiko Maeyama, Michita Mukasa, Hidetoshi Takedatsu, Shinichiro Yoshioka, Kotaro Kuwaki, Jun Akiba, Osamu Tsuruta, Takuji Torimura
Serrated lesions, including hyperplastic polyps (HPs), traditional serrated adenomas (TSAs) and sessile serrated adenomas/polyps (SSA/Ps), are important contributors to colorectal carcinogenesis. The aim of the present study was to analyze the potential of conventional endoscopy and advanced endoscopic imaging techniques to delineate the characteristic features of serrated lesions with cancer. The present study was a retrospective analysis of the data of 168 patients who had undergone colonoscopy, and a total of 228 serrated lesions (77 HPs, 58 TSAs, 84 SSA/Ps, 9 SSA/P plus TSAs) have been identified in these patients...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29805354/colorectal-adenocarcinoma-with-an-alternative-serrated-pathway
#5
Makoto Eizuka, Keisuke Kawasaki, Yosuke Toya, Risaburo Akasaka, Koki Otsuka, Akira Sasaki, Takayuki Matsumoto, Tamotsu Sugai
In a 64-year-old woman, we identified a flat, elevated lesion that was located at the caecum and was composed of 3 different areas (areas A, B, and C). We diagnosed it as "carcinoma with sessile serrated adenoma/polyp (SSA/P)" histologically. Although area A was diagnosed as classical SSA/P, area B was regarded as a high-grade SSA/P. In contrast, area C showed a differentiated-type adenocarcinoma that invaded the submucosa. The patient had a recurrence of cancer 1.5 years after endoscopic resection...
January 2018: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/29792893/tox-expression-decreases-with-progression-of-colorectal-cancers-and-is-associated-with-cd4-t-cell-density-and-fusobacterium-nucleatum-infection
#6
Ting Chen, Qing Li, Xiaoyan Zhang, Ran Long, Yaxin Wu, Jiao Wu, Xiangsheng Fu
Fusobacterium nucleatum (F. nucleatum) in the tumor microenvironment plays an important role in the development of colorectal cancer (CRC). The underlying mechanism of action, however, remains to be elucidated. We evaluated the relation of F. nucleatum amount to thymocyte selection-associated high-mobility group box (TOX) protein expression and CD4+ T cell density in 138 human colorectal tissues. TOX expression and CD4+ T cell density in F. nucleatum negative tissues were significantly higher compared to those in F...
May 21, 2018: Human Pathology
https://www.readbyqxmd.com/read/29789649/superficially-serrated-adenoma-a-proposal-for-a-novel-subtype-of-colorectal-serrated-lesion
#7
Taiki Hashimoto, Yusaku Tanaka, Reiko Ogawa, Taisuke Mori, Hiroshi Yoshida, Hirokazu Taniguchi, Nobuyoshi Hiraoka, Motohiro Kojima, Yasuhiro Oono, Yutaka Saito, Shigeki Sekine
We describe a series of colorectal polyps characterized by mixed adenomatous and serrated features, herein referred to as superficially serrated adenomas. Twenty superficially serrated adenomas were obtained from 11 female and 9 male patients aged 62-87 years. Most lesions endoscopically appeared as small sessile polyps, but larger lesions were plaque-like (2-20 mm; median, 5 mm). Eighteen lesions (90%) were located in the sigmoid colon or rectum. They consisted primarily of straight, adenomatous glands but showed serration confined to the superficial layer...
May 22, 2018: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29772067/dna-content-analysis-of-colorectal-serrated-lesions-detects-an-aneuploid-subset-of-inflammatory-bowel-disease-associated-serrated-epithelial-change-and-traditional-serrated-adenomas
#8
Won-Tak Choi, Kwun Wah Wen, Peter S Rabinovitch, Danning Huang, Aras N Mattis, Ryan M Gill
AIMS: Serrated lesions (SLs), including sessile serrated adenoma (SSA) and traditional serrated adenoma (TSA), are important premalignant lesions for colorectal cancer (CRC). Although a small subset of SLs are known to harbor TP53 mutations and Wnt/β-catenin pathway activation, suggesting that they may develop dysplasia or CRC via a 'chromosomal instability (CIN)-like' pathway, it is unclear if aneuploidy (characteristic of conventional adenoma) ever develops in SLs and is associated with development of dysplasia or CRC, in this context...
May 17, 2018: Histopathology
https://www.readbyqxmd.com/read/29747061/serrated-epithelial-colorectal-polyps-hyperplastic-polyps-sessile-serrated-adenomas-with-perineurial-stroma-clinicopathological-and-molecular-analysis-of-a-new-series
#9
Katharina Erlenbach-Wünsch, Michel Bihl, Arndt Hartmann, Gabriel M Groisman, Michael Vieth, Abbas Agaimy
Serrated colorectal fibroblastic polyps (FPs) are rare benign mucosal lesions composed of serrated epithelial crypts separated and distorted by intimately associated bland spindle cell proliferations with perineurial-like phenotype. We herein describe 21 new FPs affecting 10 females and 9 males aged 45 to 80 yrs. (mean, 62 yrs). Lesions originated in the sigmoid colon/rectosigmoid junction (n = 16), rectum (n = 2), and other parts of the colon (n = 3). Most patients had additional synchronous or metachronous polyps: classical adenomas (12 patients), sessile serrated adenoma/SSA (1 patient), hyperplastic polyps/HPs (7 patients), both HPs and adenomas (6 patients) and colorectal cancer (2 patients)...
May 4, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29742770/resection-of-large-sessile-serrated-polyps-by-cold-piecemeal-endoscopic-mucosal-resection-serrated-cold-piecemeal-endoscopic-mucosal-resection-scope
#10
Rajaratnam Rameshshanker, Zacharias Tsiamoulos, Andrew Latchford, Morgan Moorghen, Brian P Saunders
No abstract text is available yet for this article.
May 9, 2018: Endoscopy
https://www.readbyqxmd.com/read/29739023/the-clinical-significance-and-synchronous-polyp-burden-of-large-%C3%A2-20-mm-sessile-serrated-polyps-in-patients-without-serrated-polyposis-syndrome
#11
Lobke Desomer, David J Tate, Mahesh Jayanna, Maria Pellise, Halim Awadie, Nicholas G Burgess, Duncan McLeod, Hema Mahajan, Eric Y T Lee, Stephen J Williams, Michael J Bourke
BACKGROUND:  Sessile serrated polyps (SSPs) are important precursors of colorectal carcinoma and interval cancer. Large SSPs (≥ 20 mm) outside the definition of serrated polyposis syndrome (SPS) have not been studied in comparison with SPS. We aimed to describe the characteristics of patients with large SSPs in this context. METHODS:  Patients with at least one SSP (≥ 20 mm) were eligible. Data from three consecutive colonoscopies were used to compare clinical and endoscopic characteristics in three patient groups: SPS, a solitary large SSP, and patients with at least two SSPs without fulfilling the criteria for SPS (oligo-SSP)...
May 8, 2018: Endoscopy
https://www.readbyqxmd.com/read/29738362/colonic-adenomatous-polyps-involving-submucosal-lymphoglandular-complexes-a-diagnostic-pitfall
#12
Hee Eun Lee, Tsung-Teh Wu, Vishal S Chandan, Michael S Torbenson, Taofic Mounajjed
Lymphoglandular complexes (LGCs) are lymphoid nodules containing intestinal mucosa, present in close apposition to muscularis mucosae or submucosa. Rarely, colorectal adenomas involve submucosal LGCs, simulating invasive adenocarcinoma with associated submucosal lymphoid aggregates, and presenting a diagnostic pitfall. We aimed to identify distinctive histologic features between submucosal LGCs and true invasion. Seven adenomas (tubular/tubulovillous adenomas [n=6], including 4 with high-grade dysplasia and 1 with focal intramucosal adenocarcinoma, and sessile serrated adenoma [n=1]) were in the right (n=5) and left colon (n=2)...
May 4, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29736830/comparison-of-small-versus-large-volume-split-dose-preparation-for-colonoscopy-a-study-of-colonoscopy-outcomes
#13
Hassan Siddiki, Sreya Ravi, Mohanad T Al-Qaisi, Ayman R Fath, Francisco Ramirez, Michael D Crowell, Rahul Pannala, Douglas O Faigel, Suryakanth R Gurudu
BACKGROUND: Split dose bowel preparations (SDP) have superior outcomes for colonoscopy as compared to evening before regimens. However, the association of the actual volume of the SDP to colonoscopy outcome measures has not been well studied. AIMS: Compare adenoma detection rate (ADR), sessile serrated polyp detection rate (SDR), mean bowel cleanse score, and predictors of inadequate exams between small volume SDP and large volume SDP. METHODS: We have conducted a retrospective study in patients undergoing colonoscopy with small volume SDP versus large volume SDP between July 2014 and December 2014...
May 7, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29720120/telomere-length-differences-between-colorectal-polyp-subtypes-a-colonoscopy-based-case-control-study
#14
Sheetal Hardikar, Andrea N Burnett-Hartman, Amanda I Phipps, Melissa P Upton, Lee-Ching Zhu, Polly A Newcomb
BACKGROUND: Short telomeres have been associated with increased risk of many cancers, particularly cancers of the gastrointestinal tract including esophagus and stomach. However, the association between telomere length (TL) and colorectal cancer and its precursors, colorectal polyps, is not clear. METHODS: We investigated the relationship between TL and risk of colorectal polyp subtypes in a colonoscopy-based study in western Washington. Participants were 35-79 year-old enrollees at an integrated health care system, who underwent a colonoscopy between 1998 and 2007 (n = 190), completed a self-administered questionnaire, provided blood samples, and were distinguished as having adenomas, serrated polyps, or as polyp-free controls through a standardized pathology review...
May 2, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29699379/endoscopic-features-of-mucous-cap-polyps-a-way-to-predict-serrated-polyps
#15
Brian T Moy, Faripour Forouhar, Chia-Ling Kuo, Thomas J Devers
Background/Aims: The aims of the study were to identify whether a mucous-cap predicts the presence of serrated polyps, and to determine whether additional endoscopic findings predict the presence of a sessile serrated adenomas/polyp (SSA/P). Methods: We analyzed 147 mucous-capped polyps with corresponding histology, during 2011-2014. Eight endoscopic features (presence of borders, elevation, rim of debris, location in the colon, size ≥10 mm, varicose vessels, nodularity, and alteration in mucosal folds) of mucous-capped polyps were examined to see if they can predict SSA/Ps...
April 27, 2018: Clinical Endoscopy
https://www.readbyqxmd.com/read/29696479/natural-language-processing-accurately-calculates-adenoma-and-sessile-serrated-polyp-detection-rates
#16
Jennifer Nayor, Lawrence F Borges, Sergey Goryachev, Vivian S Gainer, John R Saltzman
BACKGROUND: ADR is a widely used colonoscopy quality indicator. Calculation of ADR is labor-intensive and cumbersome using current electronic medical databases. Natural language processing (NLP) is a method used to extract meaning from unstructured or free text data. AIMS: (1) To develop and validate an accurate automated process for calculation of adenoma detection rate (ADR) and serrated polyp detection rate (SDR) on data stored in widely used electronic health record systems, specifically Epic electronic health record system, Provation® endoscopy reporting system, and Sunquest PowerPath pathology reporting system...
April 26, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29590112/active-braf-v600e-is-the-key-player-in-generation-of-a-sessile-serrated-polyp-specific-dna-methylation-profile
#17
Somaye Dehghanizadeh, Vahid Khoddami, Timothy L Mosbruger, Sue S Hammoud, Kornelia Edes, Therese S Berry, Michelle Done, Wade S Samowitz, James A DiSario, Daniel G Luba, Randall W Burt, David A Jones
BACKGROUND: Sessile serrated polyps (SSPs) have emerged as important precursors for a large number of sporadic colorectal cancers. They are difficult to detect during colonoscopy due to their flat shape and the excessive amounts of secreted mucin that cover the polyps. The underlying genetic and epigenetic basis for the emergence of SSPs is largely unknown with existing genetic studies confined to a limited number of oncogenes and tumor suppressors. A full characterization of the genetic and epigenetic landscape of SSPs would provide insight into their origin and potentially offer new biomarkers useful for detection of SSPs in stool samples...
2018: PloS One
https://www.readbyqxmd.com/read/29570172/sessile-serrated-adenomas-in-young-patients-may-have-limited-risk-of-malignant-progression
#18
Mark Bettington, Ian Brown, Christophe Rosty, Neal Walker, Cheng Liu, John Croese, Tony Rahman, Sally-Ann Pearson, Diane McKeone, Barbara Leggett, Vicki Whitehall
GOALS: To provide preliminary evidence that sessile serrated adenomas (SSA) are low-risk polyps in young patients. BACKGROUND: SSAs are the dominant polyp of the serrated neoplasia pathway and as such are the precursor of up to 20% of colorectal carcinomas (CRC). Up to 90% of these cancers are expected to harbor a BRAF mutation. SSAs are being diagnosed with increasing frequency in young patients, placing a significant burden on colonoscopic services. Evidence to direct the surveillance intervals for these young patients is not available...
March 21, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29564561/development-and-endoscopic-appearance-of-colorectal-tumors-are-characterized-by-the-expression-profiles-of-mirnas
#19
REVIEW
Yoshihito Nakagawa, Yukihiro Akao, Tomomitsu Tahara, Hiromi Yamashita, Mitsuo Nagasaka, Tomoyuki Shibata, Naoki Ohmiya
Accumulating data indicates that certain microRNAs (miRNAs or miRs) are differently expressed in samples of tumors and paired non-tumorous samples taken from the same patients with colorectal tumors. We previously reported to clarify the relationship between the expression of the miRNAs and the endoscopic morphological appearance of the colorectal tumors. In this report, we focused on colorectal adenoma (tubular or tubulovillous adenoma), or tubular early carcinoma or type 2 adenocarcinoma, familial adenomatous polyposis (FAP), ulcerative colitis-associated tumor (UCAT), and sessile serrated adenoma/polyp (SSA/P)...
June 2018: Medical Molecular Morphology
https://www.readbyqxmd.com/read/29564038/sessile-serrated-adenoma-detection-rate-is-correlated-with-adenoma-detection-rate
#20
Daisuke Ohki, Yosuke Tsuji, Tomohiro Shinozaki, Yoshiki Sakaguchi, Chihiro Minatsuki, Hiroto Kinoshita, Keiko Niimi, Satoshi Ono, Yoku Hayakawa, Shuntaro Yoshida, Atsuo Yamada, Shinya Kodashima, Nobutake Yamamichi, Yoshihiro Hirata, Tetsuo Ushiku, Mitsuhiro Fujishiro, Masashi Fukayama, Kazuhiko Koike
AIM: To investigated the association between adenoma detection rate (ADR) and sessile serrated ADR (SSADR) and significant predictors for sessile serrated adenomas (SSA) detection. METHODS: This study is a retrospective, single-center analysis. Total colonoscopies performed by the gastroenterologists at the University of Tokyo Hospital between January and December 2014 were retrospectively identified. Polyps were classified as low-grade or high-grade adenoma, cancer, SSA, or SSA with cytological dysplasia, and the prevalence of each type of polyp was investigated...
March 15, 2018: World Journal of Gastrointestinal Oncology
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