Professor, Medicine, University of Colorado School of Medicine
Gastroenterology
Dr. Dennis J. Ahnen, MD
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Dennis Ahnen is an expert in the field of Gastroenterology. He studied medicine at Wayne State University School of Medicine. Wayne State University School of Medicine is ranked 63/85 in Research/PrimaryCare. He received 2 awards: "Regional Top Doctor" and "Fellow (AGAF)". Dennis Ahnen is a published MD. He published 68 publications, including: 'Knowledge and Uptake of Genetic Counseling and Colonoscopic Screening Among Individuals at Increased Risk for Lynch Syndrome and their Endoscopists from the Family Hea...'
Publications
- Real-Time Characterization of Diminutive Colorectal Polyp Histology Using Narrow-Band Imaging: Implications for the Resect and Discard Strategy.
- Knowledge and Uptake of Genetic Counseling and Colonoscopic Screening Among Individuals at Increased Risk for Lynch Syndrome and their Endoscopists from the Family Hea...
- Urinary Metabolites of Prostanoids and Risk of Recurrent Colorectal Adenomas in the Aspirin/Folate Polyp Prevention Study (AFPPS).
- Clinicopathological risk factor distributions for MLH1 promoter region methylation in CIMP positive tumors.
- Colon Cancer Screening for Colorado's Underserved: A Community Clinic/Academic Partnership.
- Status of Competency-Based Medical Education in Endoscopy Training: A Nationwide Survey of US ACGME-Accredited Gastroenterology Training Programs.
- Practical Opportunities to Improve Early Detection and Prevention of Colorectal Cancer (CRC) in Members of High-Risk Families.
- Multi-Center Colonoscopy Quality Measurement Utilizing Natural Language Processing.
- CRC Screening, Past, Present, and Future: A Tribute to Emmet Keeffe.
- Sessile serrated Polyps: detection, eradication, and prevention of the evil twin.
- Association of the Colorectal CpG island methylator phenotype with molecular features, risk factors, and family history.
- Smoking-associated risks of conventional adenomas and serrated Polyps in the colorectum.
- The association of age and race and the risk of large bowel Polyps.
- Genetic Variants in CYP2R1, CYP24A1, and VDR Modify the Efficacy of Vitamin D3 Supplementation for Increasing Serum 25-Hydroxyvitamin D Levels in a Randomized Controll...
- A randomized trial to increase Colonoscopy screening in members of high risk families in the Colorectal Cancer Family Registry and Cancer Genetics Network.
- Sessile Serrated Adenomas: An evidence-based guide to management.
- Constipation and a Low-fiber Diet Are Not Associated With Diverticulosis.
- Colorectal cancers soon after Colonoscopy: a pooled multicohort analysis.
- Prevention of Interval Colorectal Cancers: What Every Clinician Needs to Know.
- Can Colonoscopy Remain Cost-Effective for Colorectal Cancer Screening? The Impact of Practice Patterns and the Will Rogers Phenomenon on Costs.
- Gastroenterology Trainees Can Easily Learn Histologic Characterization of Diminutive Colorectal Polyps with Narrow Band Imaging.
- CYP2C9 variants increase risk of Colorectal adenoma recurrence and modify associations with smoking but not aspirin treatment.
- One-year risk for advanced Colorectal neoplasia: U.S. versus U.K. risk-stratification guidelines.
- Carcinogen metabolism genes, red meat and poultry intake, and colorectal Cancer risk.
- Are colorectal Cancer screening recommendations for first-degree relatives of patients with adenomas too aggressive?
- The American College of Gastroenterology Emily Couric Lecture--the adenoma-carcinoma sequence revisited: has the era of genetic tailoring finally arrived?
- Polymorphisms in base excision repair genes as colorectal Cancer risk factors and modifiers of the effect of diets high in red meat.
- Colonoscopy withdrawal time and risk of neoplasia at 5 years: results from VA Cooperative Studies Program 380.
- Colorectal Cancer: what to do when logic and good intentions are not enough.
- Sulindac metabolites induce proteosomal and lysosomal degradation of the epidermal growth factor receptor.
- Is computed tomographic Colonography being held to a higher standard?
- Antagonistic effects of aspirin and folic acid on inflammation markers and subsequent risk of recurrent Colorectal adenomas.
- Editorial: Colorectal Cancer and statins: reflections from the end of the road.
- Cyclooxygenase-2 polymorphisms, aspirin treatment, and risk for Colorectal adenoma recurrence--data from a randomized clinical trial.
- Using the results of a baseline and a surveillance Colonoscopy to predict recurrent adenomas with high-risk characteristics.
- Association between body mass index and colorectal neoplasia at follow-up Colonoscopy: a pooling study.
- A pooled analysis of advanced colorectal neoplasia diagnoses after Colonoscopic polypectomy.
- Colonoscopy training for nurse endoscopists: is it possible? Is it wise? Is it worth doing?
- Nonsteroidal anti-inflammatory drug use after 3 years of aspirin use and Colorectal adenoma risk: observational follow-up of a randomized study.
- High detection rates of Colorectal neoplasia by stool DNA testing with a novel digital melt curve assay.
- Gastrin, Helicobacter pylori, and Colorectal adenomas.
- Targeting EGFR in colorectal Cancer.
- Stool DNA and occult blood testing for screen detection of Colorectal neoplasia.
- Significance of serrated polyps of the Colon.
- Colorectal adenomas in a randomized folate trial: the role of baseline dietary and circulating folate levels.
- Vitamins B2, B6, and B12 and risk of new Colorectal adenomas in a randomized trial of aspirin use and folic acid supplementation.
- Difluoromethylornithine plus sulindac for the prevention of sporadic Colorectal adenomas: a randomized placebo-controlled, double-blind trial.
- Community-based preferences for stool cards versus Colonoscopy in colorectal cancer screening.
- Effect of orlistat on fecal fat, fecal biliary acids, and Colonic cell proliferation in obese subjects.
- Five-year Colon surveillance after screening Colonoscopy.
- Effect of a mailed brochure on appointment-keeping for screening Colonoscopy: a randomized trial.
- Clinical practice. Adenomatous polyps of the Colon.
- Ornithine decarboxylase polymorphism modification of response to aspirin treatment for Colorectal adenoma prevention.
- Associations of Ki-ras proto-oncogene mutation and p53 gene overexpression in sporadic Colorectal adenomas with demographic and clinicopathologic characteristics.
- Sulindac independently modulates extracellular signal-regulated kinase 1/2 and cyclic GMP-dependent protein kinase signaling pathways.
- beta-Catenin splice variants and downstream targets as markers for neoplastic progression of esophageal Cancer.
- Predictors of nonadherence to screening Colonoscopy.
- Randomized, placebo-controlled, esophageal squamous cell Cancer chemoprevention trial of selenomethionine and celecoxib.
- Nuclear accumulation of beta-catenin occurs commonly in the epithelial cells of juvenile Polyps.
- Inhibition of extracellular-signal regulated kinases 1/2 is required for apoptosis of human Colon cancer cells in vitro by sulindac metabolites.
- Measures for ascertaining use of colorectal Cancer screening in behavioral, health services, and epidemiologic research.
- Sulindac metabolites induce caspase- and proteasome-dependent degradation of beta-catenin protein in human Colon cancer cells.
- First-degree relatives of patients with advanced colorectal adenomas have an increased prevalence of colorectal Cancer.
- Sulindac sulfide inhibits epidermal growth factor-induced phosphorylation of extracellular-regulated kinase 1/2 and Bad in human Colon cancer cells.
- Calcium supplementation increases blood creatinine concentration in a randomized controlled trial.
- Genetic Variations in SMAD7 Are Associated with Colorectal Cancer Risk in the Colon Cancer Family Registry.
- Lack of significant association between serum inflammatory cytokine profiles and the presence of Colorectal adenoma.
Schools
Wayne State University School Of Medicine
University Of Colorado
Procedures Preformed
- Colon Cancer Screening
- Colonoscopy With Polypectomy
- Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
- Colorectal Cancer Screening
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Conditions Treated
- Abdominal Pain
- Anemia
- Barrett's Esophagus
- Benign Neoplasm of the Digestive System
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Doctors Specialties
- Gastroenterology
Accepted Insurances
Awards
- Regional Top Doctor
- Fellow (AGAF)
Education
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Stanford University -
University of Colorado -
Wayne State University School of Medicine
Hospital
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University of Colorado Hospital
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