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https://www.readbyqxmd.com/read/29052598/association-between-clinicopathological-characteristics-and-ras-mutation-in-colorectal-cancer
#1
Johan Rimbert, Gaëlle Tachon, Audelaure Junca, Claire Villalva, Lucie Karayan-Tapon, David Tougeron
In colorectal cancer, KRAS (exons 2, 3, and 4) and NRAS (exons 2, 3, and 4) mutations are associated with resistance to antiepidermal growth factor receptor monoclonal antibodies, and BRAF mutation is a molecular marker of poor prognosis. KRAS exon 2 and BRAF-mutated colorectal cancers have well-known distinct clinicopathological characteristics. Comparison of tumors with different RAS status (exons 2, 3, and 4 of KRAS and NRAS) based on their clinicopathological characteristics has never been established. All colorectal cancer patients with RAS and BRAF testing from 2011 to 2015 were included in this observational retrospective study...
October 20, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29052271/living-with-a-resected-rectum-after-rectal-cancer-surgery-struggling-not-to-let-bowel-function-control-life
#2
Maria Reinwalds, Andrea Blixter, Eva Carlsson
AIMS AND OBJECTIVE: To illuminate what it means to live with a resected rectum due to rectal cancer, after reversal of a temporary loop-ileostomy. BACKGROUND: Today, treatment for rectal cancer is performed with increasing emphasis on sphincter-saving surgery, meaning that an anterior resection often includes construction of a temporary loop-ileostomy that is later reversed. The majority of patients will subsequently have disordered bowel function, with symptoms ranging from urgency to fecal incontinence...
October 20, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29048580/the-impact-of-young-age-on-the-prognosis-for-colorectal-cancer-a-population-based-study-in-taiwan
#3
Chia-Lin Chou, Chien-Jen Tseng, Yow-Ling Shiue
Background: The impact of age as a prognostic factor for patients with colorectal cancer (CRC) remains controversial, possibly due to heterogeneity between studies in terms of patient numbers, percentage of patients undergoing curative resection, percentage of patients receiving neoadjuvant therapy, or failure to adjust for potential confounding factors. This study used colorectal cancer survival data from the Taiwan Cancer Registry database in order to comprehensively analyze age as a prognostic factor...
November 1, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29038832/dynamics-of-rectal-balloon-implant-shrinkage-in-prostate-vmat-influence-on-anorectal-dose-and-late-rectal-complication-risk
#4
Ben G L Vanneste, Y van Wijk, L C Lutgens, E J Van Limbergen, E N van Lin, K van de Beek, P Lambin, A L Hoffmann
PURPOSE: To assess the effect of a shrinking rectal balloon implant (RBI) on the anorectal dose and complication risk during the course of moderately hypofractionated prostate radiotherapy. METHODS: In 15 patients with localized prostate cancer, an RBI was implanted. A weekly kilovolt cone-beam computed tomography (CBCT) scan was acquired to measure the dynamics of RBI volume and prostate-rectum separation. The absolute anorectal volume encompassed by the 2 Gy equieffective 75 Gy isodose (V75Gy) was recalculated as well as the mean anorectal dose...
October 16, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/29038151/obesity-and-cancer-evidence-impact-and-future-directions
#5
REVIEW
Graham A Colditz, Lindsay L Peterson
BACKGROUND: Mounting evidence, particularly from prospective epidemiologic studies but with additional support from animal models and mechanistic studies, supported conclusions in 2016 by the International Agency for Research on Cancer (IARC)(3) in their review of the preventive effects of weight control on cancer risk. CONTENT: The workgroup concluded that obesity is causally related to cancer at 13 anatomic sites (esophagus: adenocarcinoma; gastric cardia; colon and rectum; liver; gallbladder; pancreas; breast: postmenopausal; uterine endometrial; ovary; kidney: renal cell; meningioma; thyroid; and multiple myeloma)...
October 16, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29037095/biological-dose-and-complication-probabilities-for-the-rectum-and-bladder-based-on-linear-energy-transfer-distributions-in-spot-scanning-proton-therapy-of-prostate-cancer
#6
Jesper Pedersen, Jørgen B B Petersen, Camilla H Stokkevåg, Kristian S Ytre-Hauge, Stella Flampouri, Zuofeng Li, Nancy Mendenhall, Ludvig P Muren
BACKGROUND: The increased linear energy transfer (LET) at the end of the Bragg peak causes concern for an elevated and spatially varying relative biological effectiveness (RBE) of proton therapy (PT), often in or close to dose-limiting normal tissues. In this study, we investigated dose-averaged LET (LETd) distributions for spot scanning PT of prostate cancer patients using different beam angle configurations. In addition, we derived RBE-weighted (RBEw) dose distributions and related normal tissue complication probabilities (NTCPs) for the rectum and bladder...
October 17, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29033218/early-onset-colorectal-cancer-is-distinct-from-traditional-colorectal-cancer
#7
Heather Yeo, Doron Betel, Jonathan S Abelson, Xi E Zheng, Rhonda Yantiss, Manish A Shah
BACKGROUND: Early-onset colorectal cancer (E-CRC) is increasing in incidence, unlike traditional CRC (T-CRC). We sought to characterize differences between E-CRC and T-CRC. MATERIALS AND METHODS: Data sources included the Surveillance, Epidemiology, and End Results database, the Behavioral Risk Factor Surveillance Survey, and The Cancer Genome Atlas (TCGA). We compared demographics, tumor characteristics, and incidence of CRC in subjects aged 20 to 49 years (E-CRC) with those aged ≥ 50 years (T-CRC)...
June 23, 2017: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/29031916/image-guided-adaptive-external-beam-radiation-therapy-for-cervix-cancer-evaluation-of-a-clinically-implemented-plan-of-the-day-technique
#8
Martin Buschmann, Katarina Majercakova, Alina Sturdza, Stephanie Smet, Dina Najjari, Michaela Daniel, Richard Pötter, Dietmar Georg, Yvette Seppenwoolde
BACKGROUND: Radiotherapy for cervix cancer is challenging in patients exhibiting large daily changes in the pelvic anatomy, therefore adaptive treatments (ART) have been proposed. The aim of this study was the clinical implementation and subsequent evaluation of plan-of-the-day (POTD)-ART for cervix cancer in supine positioning. The described workflow was based on standard commercial equipment and current quality assurance (QA) methods. MATERIALS AND METHODS: A POTD strategy, which employs a VMAT plan library consisting of an empty bladder plan, a full bladder plan and a motion robust backup plan, was developed...
October 11, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/29029440/colorectal-carcinoma-with-osseous-metaplasia
#9
Xibo Liu, Jinghong Xu, Lirong Chen
Osseous metaplasia (OM) is rarely observed in colorectal cancer (incidence < 0.4% in rectal cancer), where it has a non-specific clinical presentation and unknown pathogenesis. Here, we report three cases of colorectal carcinoma with OM and propose a new hypothesis. All three patients (two males and one female) were Chinese and had different sites of colorectal carcinoma with OM: rectum, sigmoid colon, and appendix. The pathologic diagnoses were serrated adenocarcinoma; moderately to poorly differentiated adenocarcinoma with micropapillary carcinoma and cribriform comedo-type adenocarcinoma; and mucinous adenocarcinoma, respectively...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29025095/the-mediterranean-diet-and-risk-of-colorectal-cancer-in-the-uk-women-s-cohort-study
#10
Petra Jones, Janet E Cade, Charlotte E L Evans, Neil Hancock, Darren C Greenwood
Background: Evidence from epidemiological studies investigating associations between adherence to the Mediterranean diet and colorectal cancer is inconsistent. The aim of this study is to assess in the UK Women's Cohort Study whether adherence to the Mediterranean dietary pattern is associated with reduced incidence of cancers of the colon and rectum. Method: A total of 35 372 women were followed for a median of 17.4 years. A 10-component score indicating adherence to the Mediterranean diet was generated for each cohort participant, using a 217-item food frequency questionnaire...
August 19, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29022779/short-term-surgical-outcomes-and-patient-quality-of-life-between-robotic-and-laparoscopic-extralevator-abdominoperineal-excision-for-adenocarcinoma-of-the-rectum
#11
D Kamali, A Reddy, S Imam, K Omar, A Jha, M Jha
Introduction Some studies advocate a laparoscopic extralevator abdominoperineal excision (l-ELAPE) approach for low rectal cancer. The da Vinci™ robot (r-ELAPE) technique has potential to overcome some limitations of l-ELAPE, such as reduction of the learning curve and more precise tissue handling. It is unknown whether this approach results in improved surgical or quality of life outcomes compared with l-ELAPE. This study aimed to address this issue. Methods Consecutive patients having undergone either robotic or laparoscopic ELAPE for adenocarcinoma were studied...
September 15, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29019544/pathophysiological-aspects-of-the-low-anterior-resection-syndrome-for-treatment-of-rectal-cancer
#12
Kelly Cristine de Lacerda Rodrigues Buzatti, Andy Petroianu
The number of patients with bowel dysfunction due to the treatment of rectal cancer has increased during the recent decades. Anatomical and functional disorders after the removal of the rectum are followed by increased stool frequency, urgency, multiple evacuations and flatus or stool incontinence characterizing the low anterior resection syndrome - LARS. The purpose of this article is to present a review of the literature on current concepts and pathophysiological aspects of bowel dysfunction after resection of rectal cancer...
July 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28993108/evaluation-of-interfractional-variation-of-organs-and-displacement-of-catheters-during-high-dose-rate-interstitial-brachytherapy-for-gynecologic-malignancies
#13
Soyoung Lee, Ellis Rodney, Bryan Traughber, Tithi Biswas, Valdir Colussi, Tarun Podder
PURPOSE: To investigate the dosimetric effects due to interfractional changes in catheter position and variation in patient's anatomy during the course of interstitial high-dose-rate (HDR) brachytherapy. METHODS AND MATERIALS: A total of 15 patients with either cervical or vaginal cancer underwent interstitial HDR brachytherapy. Interstitial catheters and fiducials were placed under fluoroscopy and intraoperative 3T MRI to confirm the desired catheter placement for adequate target volume coverage...
October 6, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28991083/prediction-of-n0-irradiated-rectal-cancer-comparing-mri-before-and-after-preoperative-chemoradiotherapy
#14
COMPARATIVE STUDY
Fabio Pomerri, Filippo Crimì, Nicola Veronese, Alessandro Perin, Carmelo Lacognata, Francesca Bergamo, Caterina Boso, Isacco Maretto
BACKGROUND: The prediction of lymph node status using MRI has an impact on the management of rectal cancer, both before and after preoperative chemoradiotherapy. OBJECTIVE: The purpose of this study was to maximize the negative predictive value and sensitivity of mesorectal lymph node imaging after chemoradiotherapy because postchemoradiation node-negative patients may be treated with rectum-sparing approaches. DESIGN: This was a retrospective study...
November 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28991003/site-specific-solid-cancer-mortality-following-exposure-to-ionizing-radiation-a-cohort-study-of-workers-inworks
#15
David B Richardson, Elisabeth Cardis, Robert D Daniels, Michael Gillies, Richard Haylock, Klervi Leuraud, Dominique Laurier, Monika Moissonnier, Mary K Schubauer-Berigan, Isabelle Thierry-Chef, Ausrele Kesminiene
BACKGROUND: There is considerable scientific interest in associations between protracted low-dose exposure to ionizing radiation and the occurrence of specific types of cancer. METHODS: Associations between ionizing radiation and site-specific solid cancer mortality were examined among 308,297 nuclear workers employed in France, the United Kingdom, and the United States. Workers were monitored for external radiation exposure and follow-up encompassed 8.2 million person-years...
October 4, 2017: Epidemiology
https://www.readbyqxmd.com/read/28990311/comprehensive-data-of-3-820-patients-newly-diagnosed-with-colorectal-liver-metastasis-between-2005-and-2007-report-of-a-nationwide-survey-in-japan
#16
Katsunori Sakamoto, Goro Honda, Toru Beppu, Kenjiro Kotake, Masakazu Yamamoto, Keiichi Takahashi, Itaru Endo, Kiyoshi Hasegawa, Michio Itabashi, Yojiro Hashiguchi, Yoshihito Kotera, Shin Kobayashi, Tatsuro Yamaguchi, Satoshi Morita, Masaru Miyazaki, Kenichi Sugihara
To collect big data for further research to improve treatment outcomes in patients with colorectal liver metastasis (CRLM), the Joint Committee for Nationwide Survey on Colorectal Liver Metastasis was established by the Japanese Society for Cancer of the Colon and Rectum and the Japanese Society of Hepato-Biliary-Pancreatic Surgery. The joint committee initiated data collection since 2014. The data of 4,237 patients newly diagnosed with CRLM between 2005 and 2007 were registered from 134 departments of 127 institutions (64%) among 209 departments (from 201 institutions) that agreed to participate in this study...
October 9, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/28989593/colorectal-cancer-screening-a-comprehensive-review-to-recent-non-invasive-methods
#17
REVIEW
Leila Hamzehzadeh, Meysam Yousefi, Seyed-Hamidollah Ghaffari
Colorectal cancer (CRC) is one of the most common cancers worldwide and considered to be one of the hassles in medical communities. CRC develops from precancerous polyps in the colon or rectum and is preventable and curable by an early diagnosis and with the removal of premalignant polyps. In recent years, scientists have looked for inexpensive and safe ways to detect CRC in its earliest stages. Strong evidence shows that screening for CRC is a crucial way to reduce the incidence and mortality of this devastating disease...
July 1, 2017: International Journal of Hematology-oncology and Stem Cell Research
https://www.readbyqxmd.com/read/28983442/minimal-rectal-toxicity-in-the-setting-of-comorbid-crohn-s-disease-following-prostate-cancer-radiotherapy-with-a-hydrogel-rectal-spacer
#18
Raj Singh, Philip S Jackson, Mollie Blake, James Cutlip, Sanjeev Sharma
We present one of the first cases of a prostate cancer (PCa) patient with inflammatory bowel disease (IBD) treated with intensity-modulated radiotherapy (IMRT) and a hydrogel rectal spacer. A 73-year-old male with a past medical history significant for Crohn's disease (CD) and the recent diagnosis of T1cN0M0 high-risk PCa was referred for definitive radiotherapy. Given the patient's history of CD and the possible increased risk of gastrointestinal (GI) toxicity and disease exacerbation, prior to IMRT, a hydrogel spacer was placed between the prostate and the anterior rectal wall to further minimize irradiation to the rectum...
August 1, 2017: Curēus
https://www.readbyqxmd.com/read/28983373/rectal-toxicity-after-extremely-hypofractionated-radiotherapy-using-a-non-isocentric-robotic-radiosurgery-system-for-early-stage-prostate-cancer
#19
Naoto Shikama, Yu Kumazaki, Kazunari Miyazawa, Keiji Nihei, Shinpei Hashimoto, Nobuhiro Tsukamoto
BACKGROUND: The aim of the study was to evaluate toxicity after extremely hypofractionated radiotherapy (EHF-RT) using a non-isocentric robotic radiosurgery system for early stage prostate cancer. METHODS: Eligibility criteria of this feasibility study were 50 - 84 years old, and low-risk to intermediate-risk disease. The prescribed dose to the iso-dose line of 95% of planning target volume was 35 Gy in five fractions over 2 weeks. The primary endpoint was the incidence of ≥ grade 2 acute toxicity which indicated symptoms requiring medications...
December 2016: World Journal of Oncology
https://www.readbyqxmd.com/read/28982899/transanal-assisted-resection-with-closure-of-anal-canal-for-lower-rectal-diseases
#20
Hidejiro Kawahara, Tadashi Akiba, Katsuhiko Yanaga
BACKGROUND/AIM: Abdominoperineal resection (APR) has been performed for lower rectal cancer, anal cancer and inflammatory diseases, but is associated with postoperative complications such as inflammation of pelvic dead space or perineal wound infection. We are performing a novel procedure (transanal assisted resection with closure of anal canal, TARC) that resects the intestine by using transanal assist and close the anal canal for patients who do not require resection of the anus and anal canal...
October 2017: Anticancer Research
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