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https://www.readbyqxmd.com/read/29450610/ctc-technique-methods-to-ensure-an-optimal-exam
#1
Kevin J Chang, David H Kim
CT colonography (CTC) has demonstrated equivalent accuracy to optical colonoscopy in the detection of clinically relevant polyps and tumors but this is only possible when technique is optimized. The two most important features of a high-quality CTC are a well-prepared colon and a distended colon. This article will discuss the dietary, bowel preparation, and fecal/fluid tagging options to best prepare the colon. Strategies to optimally distend the colon will also be discussed. CT scan techniques including patient positioning and radiation dose optimization will be reviewed...
February 15, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29448085/plk2-loss-commonly-occurs-in-colorectal-carcinomas-but-not-adenomas-relationship-to-mtor-signaling
#2
Elizabeth M Matthew, Zhaohai Yang, Suraj Peri, Mark Andrake, Roland Dunbrack, Eric Ross, Wafik S El-Deiry
Plk2 is a target of p53. Our previous studies demonstrated that with wild-type p53, Plk2 impacts mTOR signaling in the same manner as TSC1, and Plk2-deficient tumors grew larger than control. Other investigators have demonstrated that Plk2 phosphorylates mutant p53 in a positive feedback loop. We investigated Plk2's tumor suppressor functions in relationship to mTOR signaling. Archival specimens from 12 colorectal adenocarcinomas were stained for markers including Plk2, phosphorylated mTOR (serine 2448) and ribosomal S6 (Serine 235/236)...
February 12, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29445907/management-of-serrated-polyps-of-the-colon
#3
REVIEW
Claire Fan, Adam Younis, Christine E Bookhout, Seth D Crockett
PURPOSE OF REVIEW: The purpose of this review is to summarize the management of serrated colorectal polyps (SPs), with a particular focus on the most common premalignant SP, sessile serrated adenoma or polyp (SSA/P). These lesions present a challenge for endoscopists with respect to detection and resection, and are also susceptible to pathologic misdiagnosis. RECENT FINDINGS: Patients with SSA/Ps are at an increased risk of future colorectal neoplasia, including advanced polyps and cancer...
February 14, 2018: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/29438375/telomere-length-and-genetics-are-independent-colorectal-tumour-risk-factors-in-an-evaluation-of-biomarkers-in-normal-bowel
#4
Ceres Fernandez-Rozadilla, Christiana Kartsonaki, Connor Woolley, Michael McClellan, Deb Whittington, Gareth Horgan, Simon Leedham, Skirmantas Kriaucionis, James East, Ian Tomlinson
BACKGROUND: Colorectal cancer (CRC) screening might be improved by using a measure of prior risk to modulate screening intensity or the faecal immunochemical test threshold. Intermediate molecular biomarkers could aid risk prediction by capturing both known and unknown risk factors. METHODS: We sampled normal bowel mucosa from the proximal colon, distal colon and rectum of 317 individuals undergoing colonoscopy. We defined cases as having a personal history of colorectal polyp(s)/cancer, and controls as having no history of colorectal neoplasia...
February 13, 2018: British Journal of Cancer
https://www.readbyqxmd.com/read/29435136/epigenetic-silencing-of-smoc1-in-traditional-serrated-adenoma-and-colorectal-cancer
#5
Hironori Aoki, Eiichiro Yamamoto, Akira Takasawa, Takeshi Niinuma, Hiro-O Yamano, Taku Harada, Hiro-O Matsushita, Kenjiro Yoshikawa, Ryo Takagi, Eiji Harada, Yoshihito Tanaka, Yuko Yoshida, Tomoyuki Aoyama, Makoto Eizuka, Akira Yorozu, Hiroshi Kitajima, Masahiro Kai, Norimasa Sawada, Tamotsu Sugai, Hiroshi Nakase, Hiromu Suzuki
Colorectal sessile serrated adenoma/polyps (SSA/Ps) are well-known precursors of colorectal cancer (CRC) characterized by BRAF mutation and microsatellite instability. By contrast, the molecular characteristics of traditional serrated adenoma (TSAs) are not fully understood. We analyzed genome-wide DNA methylation in TSAs having both protruding and flat components. We identified 11 genes, including SMOC1 , methylation of which progressively increased during the development of TSAs. SMOC1 was prevalently methylated in TSAs, but was rarely methylated in SSA/Ps ( p < 0...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29435077/clinical-value-of-the-preoperative-neutrophil-to-lymphocyte-ratio-and-red-blood-cell-distribution-width-in-patients-with-colorectal-carcinoma
#6
Fuyan Han, Xuming Shang, Furong Wan, Zhanfeng Liu, Wenjun Tian, Dan Wang, Yiqing Liu, Yong Wang, Bingchang Zhang, Ying Ju
The aim of the present study was to investigate the clinical value of the preoperative neutrophil-to-lymphocyte ratio (NLR) and red blood cell distribution width (RDW) in the peripheral blood of colorectal carcinoma (CRC) patients. Clinical data obtained from 240 patients with CRC undergoing radical surgical resection in Shandong Provincial Hospital Affiliated to Shandong University (Jinan, Shandong, China) between January 2011 and April 2015 were retrospectively analyzed. Data were also collected from 110 patients with colon polyps and 48 healthy volunteers to serve as controls for comparative analysis...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434857/correlation-between-tap-detection-and-common-digestive-tract-precancerous-lesions
#7
Changqing Sun, Fang Deng, Lingjun Meng, Guohua Chen
The aim of the present study was to investigate the clinical significance of abnormal sugar-chain glycoprotein tumor abnormal protein (TAP) in the screening of common digestive tract pre-cancer colon adenocarcinoma lesions. A total of 50 colitis patients, 50 colon polyp patients and 50 colon adenocarcinoma patients admitted to our hospital from March, 2012 to May, 2014 were included. Fresh blood from patient's fingertips was collected and condensation staining was used to detect TAP expression. Positive expressions of TAP in patients in the colitis, colon polyp and colon adenocarcinoma groups prior to treatment were 6,76 and 92%, respectively...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29423501/association-of-sulindac-and-erlotinib-vs-placebo-with-colorectal-neoplasia-in-familial-adenomatous-polyposis-secondary-analysis-of-a-randomized-clinical-trial
#8
N Jewel Samadder, Scott K Kuwada, Kenneth M Boucher, Kathryn Byrne, Priyanka Kanth, Wade Samowitz, David Jones, Sean V Tavtigian, Michelle Westover, Therese Berry, Kory Jasperson, Lisa Pappas, Laurel Smith, Danielle Sample, Randall W Burt, Deborah W Neklason
Importance: Patients with familial adenomatous polyposis (FAP) are at markedly increased risk for colorectal polyps and cancer. A combination of sulindac and erlotinib led to a 71% reduction in duodenal polyp burden in a phase 2 trial. Objective: To evaluate effect of sulindac and erlotinib on colorectal adenoma regression in patients with FAP. Design, Setting, and Participants: Prespecified secondary analysis for colorectal adenoma regression was carried out using data from a double-blind, randomized, placebo-controlled trial, enrolling 92 patients with FAP, conducted from July 2010 to June 2014 in Salt Lake City, Utah...
February 8, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29421953/using-community-engagement-and-navigators-to-increase-colon-cancer-screening-and-patient-outcomes
#9
Paul G Devereux, John Gray, Susan Robinson, Janie Galvin, Jesse Gutierrez
A theory-driven tailored intervention developed in partnership with the community used evidence-based practices to (a) increase knowledge about colon cancer and screening and (b) assist patients in completing screenings. During the 16 months of delivery screening, patient navigators integrated into gastroenterology clinics met all goals, which included (a) enrolling an ethnically diverse group of participants ( N = 415) through inreach (clinic-referred patients who did not schedule appointments) and community outreach, (b) facilitating screening completions for 217 of the 358 (61%) patients identified as needing screening, and (c) obtaining satisfaction ratings from 89% of participants...
February 1, 2018: Health Promotion Practice
https://www.readbyqxmd.com/read/29420293/patients-with-familial-adenomatous-polyposis-harbor-colonic-biofilms-containing-tumorigenic-bacteria
#10
Christine M Dejea, Payam Fathi, John M Craig, Annemarie Boleij, Rahwa Taddese, Abby L Geis, Xinqun Wu, Christina E DeStefano Shields, Elizabeth M Hechenbleikner, David L Huso, Robert A Anders, Francis M Giardiello, Elizabeth C Wick, Hao Wang, Shaoguang Wu, Drew M Pardoll, Franck Housseau, Cynthia L Sears
Individuals with sporadic colorectal cancer (CRC) frequently harbor abnormalities in the composition of the gut microbiome; however, the microbiota associated with precancerous lesions in hereditary CRC remains largely unknown. We studied colonic mucosa of patients with familial adenomatous polyposis (FAP), who develop benign precursor lesions (polyps) early in life. We identified patchy bacterial biofilms composed predominately of Escherichia coli and Bacteroides fragilis Genes for colibactin (clbB) and Bacteroides fragilis toxin (bft), encoding secreted oncotoxins, were highly enriched in FAP patients' colonic mucosa compared to healthy individuals...
February 2, 2018: Science
https://www.readbyqxmd.com/read/29419691/sigmoid-colon-translocation-of-an-intrauterine-device-misdiagnosed-as-a-colonic-polyp-a-case-report
#11
Xin-Xin Zhou, Mo-Sang Yu, Meng-Li Gu, Wei-Xiang Zhong, Hong-Ru Wu, Feng Ji, Hang-Hai Pan
RATIONALE: Intrauterine contraceptive devices (IUDs) are recommended as a means of contraception. Translocation of IUD is a rare and serious complication. Colonic inflammatory mass caused by translocated IUD initially misdiagnosed as a colonic polyp is extremely rare and has not been reported yet. PATIENT CONCERNS: This report presents a case of sigmoid colon translocation of intrauterine device on a 37-year-old female patient. Colonoscopy was performed due to her complain of repeated blood in stools and subsequently the patient was misdiagnosed as a sigmoid colon polyp...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29417332/left-sided-colectomy-one-of-the-important-risk-factors-of-metachronous-colorectal-adenoma-after-colectomy-for-colon-cancer
#12
Gee Young Yun, Hee Seok Moon, In Sun Kwon, Ju Seok Kim, Sun Hyung Kang, Eaum Seok Lee, Seok Hyun Kim, Jae Kyu Sung, Byung Seok Lee, Hyun Yong Jeong
BACKGROUND: Patients with a history of colonic resection for cancer have an increased risk for the development of metachronous malignant lesions. However, there is a lack of data on the detection rates of premalignant lesions during colonoscopy surveillance in these patients, and the few existing studies have shown conflicting results. AIMS: To identify the risk factor of metachronous premalignant lesions after colon cancer surgery. METHODS: We retrospectively screened consecutive patients who had undergone colonic surgery to treat colon cancer at the Chungnam National University Hospital between September 2009 and April 2014...
February 8, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29416927/herniation-of-crypts-in-hyperplastic-polyp-and-sessile-serrated-adenoma-a-prospective-study
#13
Kun Hu, Shiqian Shen, Lanjing Zhang
Presence of colonic crypts in submucosa was previously termed as herniation of crypts, pseudoinvasion, epithelial-misplacement, or inverted hyperplastic-polyp. It is considered as an important criterion for diagnosing sessile serrated adenoma (SSA), which links to a higher risk of synchronous and future colorectal cancers compared with hyperplastic polyp (HP). Here, we aimed to study the frequencies, diagnostic specificity and synchronous neoplasms of herniation of crypts in HP and SSA. We prospectively included all HP and SSA cases and 514 randomly-selected colorectal polyps of normal histology diagnosed from 2013 to 2015 at our institution...
2018: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29415287/residual-adenoma-after-cold-snare-polypectomy-for-small-colorectal-adenomas-a-prospective-clinical-study
#14
Daisuke Maruoka, Makoto Arai, Naoki Akizue, Kentaro Ishikawa, Shingo Kasamatsu, Takashi Taida, Hideaki Ishigami, Kenichiro Okimoto, Keiko Saito, Tomoaki Matsumura, Tomoo Nakagawa, Tatsuro Katsuno, Naoya Kato
BACKGROUND: Endoscopic resection of all colonic adenomas prevents the occurrence of colon cancer and death. The European Society of Gastrointestinal Endoscopy Clinical Guideline recommends resection of all polyps predicted to be adenomas and cold snare polypectomy (CSP) for removal of adenomas ≤ 9 mm on the basis of safety; however, it also states that this recommendation lacks adequate evidence of efficacy. The residual adenoma rate after resection is an important indicator of efficacy, but there have been no reports showing this prospectively...
February 7, 2018: Endoscopy
https://www.readbyqxmd.com/read/29411735/the-importance-of-early-diagnosis-of-gardner-s-syndrome-in-dental-examination
#15
M Z Adisen, A Okkesim, M Misirlioglu
Gardner syndrome (GS) is a rare genetic disorder. Dentists play an important role in diagnosis considering that craniomaxillofacial osteomas are a major criteria for GS. We report a 26-year-old male patient who referred to our department with toothache. On routine panoramic radiographic examination, multiple radiopaque masses were detected incidentally. In addition, on extraoral examination, a soft tissue tumor was detected on his shoulder. The patient was referred to the gastroenterology department and intestinal polyps were detected in the colon...
January 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29411294/timed-colonoscopy-withdrawal-a-mandatory-quality-measure-in-the-era-of-national-screening
#16
Vikrant Parihar, Claire O'Leary, Paud O'Reagan
BACKGROUND: A minimum recommended withdrawal time for screening colonoscopy is recommended for by both the US Multi-Society Task Force on Colorectal Cancer and European Society of Gastrointestinal Endoscopy. AIM: To characterize the relationship between endoscopists withdrawal time at colonoscopy and polyp detection in a symptomatic cohort of patients as compared to previously untimed withdrawal. METHODS: Three experienced medical endoscopists prospectively performed 1079 colonoscopies during a 24-month period in an Irish hospital...
February 6, 2018: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29407693/the-value-of-red-blood-cell-distribution-width-in-diagnosis-of-patients-with-colorectal-cancer
#17
Dianyu Yang, Wenqiang Quan, Junlu Wu, Xiaoyi Ji, Yan Dai, Weidong Xiao, Helen Chew, Zujun Sun, Dong Li
BACKGROUND: Red blood cell distribution width (RDW) is a parameter of standard full blood count tests that reflects the size variability of erythrocytes In recent studies, RDW levels have been associated with ischemic heart disease, acute and chronic heart failure, hypertension, and inflammatory bowel disease. However, it is unclear whether RDW is associated with colorectal cancer. METHODS: Eighty-five patients were diagnosed with colorectal cancer. Fifty-four other patients each diagnosed with colon polyps during the same period served as the control group...
February 1, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29404921/update-on-bowel-preparation-for-colonoscopy
#18
REVIEW
Cristina C Rutherford, Audrey H Calderwood
PURPOSE OF REVIEW: Colonoscopy is the gold standard for visualization and diagnosis of conditions involving the colon and terminal ileum. It also facilitates screening and prevention of colorectal cancer, which is the second leading cause of cancer death in the USA. Adequate cleansing is essential for thorough visualization of the colon with successful detection of colon polyps. RECENT FINDINGS: While the original large-volume polyethylene glycol preparations are still commonly used, several lower volume regimens are widely available and selected based on provider and patient preferences...
February 5, 2018: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/29404639/ct-colonography-interpretation-how-to-maximize-polyp-detection-and-minimize-overcalling
#19
Seong Ho Park, David H Kim
This article outlines how to achieve maximum accuracy in interpreting CT colonography (CTC) regarding colonic findings. Interpreting extracolonic findings seen on CTC is a separate diagnostic task and will not be addressed in this article. While many interpretive pitfalls are in fact related to CTC techniques, this article focuses on issues that are related to interpretive knowledge and skills, avoiding in-depth discussions on CTC techniques. Principal methods and further tips for detecting possible polyp candidates and for confirming true soft-tissue polyps will be discussed...
February 5, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29396559/early-skeletal-colonization-of-the-coral-holobiont-by-the-microboring-ulvophyceae-ostreobium-sp
#20
A Massé, I Domart-Coulon, S Golubic, D Duché, A Tribollet
Ostreobium sp. (Bryopsidales, Ulvophyceae) is a major microboring alga involved in tropical reef dissolution, with a proposed symbiotic lifestyle in living corals. However, its diversity and colonization dynamics in host's early life stages remained unknown. Here, we mapped microborer distribution and abundance in skeletons of the branching coral Pocillopora damicornis from the onset of calcification in primary polyps (7 days) to budding juvenile colonies (1 and 3 months) growing on carbonate and non-carbonate substrates pre-colonized by natural biofilms, and compared them to adult colonies (in aquarium settings)...
February 2, 2018: Scientific Reports
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