2026 Dennis J. Ahnen: Medicine Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	National Ranking	Publications	Citations
Medicine	90	12013	6158	346	40962

Dennis J. Ahnen publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Dennis J. Ahnen sits on this spectrum.

101 publications 1,796+

This scientist: 346 publications — 27th percentile

27% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Dennis J. Ahnen D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Dennis J. Ahnen sits on this spectrum.

70 D-Index 217+

This scientist: 90 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Dennis J. Ahnen was affiliated with the University of Colorado Denver in the United States. Their main field of study was Medicine, with a focus on several subfields including Oncology, Pathology and Forensic Medicine, Cancer Research, Surgery, and Pharmacology.

Their research topics covered a range of subjects primarily related to colorectal and other gastrointestinal cancers. The main topics of their work included:

Genetic factors in colorectal cancer
Colorectal Cancer Screening and Detection
Cancer, Lipids, and Metabolism
Colorectal Cancer Treatments and Studies
Inflammatory mediators and NSAID effects
Colorectal and Anal Carcinomas
Gastric Cancer Management and Outcomes

Dennis J. Ahnen's publication record featured multiple recent papers with diverse research focuses. Notable papers included:

"Underutilization of Lynch Syndrome Screening at Two Large Veterans Affairs Medical Centers," 2020, published in Digestive Diseases and Sciences
"Proliferation, apoptosis and their regulatory protein expression in colorectal adenomas and serrated lesions," 2021, published in PLoS ONE
"Bariatric Surgery Is Associated with a Recent Temporal Increase in Colorectal Cancer Resections, Most Pronounced in Adults Below 50 Years of Age," 2020, published in Obesity Surgery
"Genetic Variations in SMAD7 Are Associated with Colorectal Cancer Risk in the Colon Cancer Family Registry," 2020, published in UNC Libraries
"Clinicopathologic Risk Factor Distributions for MLH1 Promoter Region Methylation in CIMP-Positive Tumors," 2020, published in UNC Libraries

Their work was published across various venues, with a significant number of publications appearing in UNC Libraries. Other frequent venues included PLoS ONE, Digestive Diseases and Sciences, Obesity Surgery, and JAMA Oncology.

Dennis J. Ahnen also collaborated extensively with several researchers. Frequent coauthors included:

John A. Baron
Robert W. Haile
John L. Hopper
Noralane M. Lindor
Daniel D. Buchanan

Best Publications

Colorectal cancer statistics, 2017.

Rebecca L. Siegel;Kimberly D. Miller;Stacey A. Fedewa;Dennis J. Ahnen

7045
Citations
Use of Colonoscopy to Screen Asymptomatic Adults for Colorectal Cancer

David A. Lieberman;David G. Weiss;John H. Bond;Dennis J. Ahnen

2299
Citations
A randomized trial of aspirin to prevent colorectal adenomas

John A. Baron;Bernard F. Cole;Robert S. Sandler;Robert W. Haile

1815
Citations
Helicobacter pylori in Peptic Ulcer Disease

Tadataka Yamada;John G. Searle;Dennis Ahnen

1380
Citations
Serrated Lesions of the Colorectum: Review and Recommendations From an Expert Panel

Douglas K. Rex;Dennis J. Ahnen;John A. Baron;Kenneth P. Batts

1230
Citations
Long-term outcome of medical and surgical therapies for gastroesophageal reflux disease: follow-up of a randomized controlled trial.

Stuart Jon Spechler;Edward Lee;Dennis Ahnen;Raj K. Goyal

1208
Citations
Folic acid for the prevention of colorectal adenomas: a randomized clinical trial.

Bernard F. Cole;John A. Baron;Robert S. Sandler;Robert W. Haile

1165
Citations
A Pooled Analysis of Advanced Colorectal Neoplasia Diagnoses After Colonoscopic Polypectomy

María Elena Martínez;John A. Baron;David A. Lieberman;Arthur Schatzkin

676
Citations
Identification of Lynch syndrome among patients with colorectal cancer

Leticia Moreira;Francesc Balaguer;Noralane Lindor;Albert De La Chapelle

614
Citations
Antineoplastic Drugs Sulindac Sulfide and Sulfone Inhibit Cell Growth by Inducing Apoptosis

Gary A. Piazza;Alanna L. Kulchak Rahm;Mary Krutzsch;Gerhard Sperl

599
Citations
Difluoromethylornithine plus sulindac for the prevention of sporadic colorectal adenomas: A randomized placebo-controlled, double-blind trial

Frank L. Meyskens;Christine E. McLaren;Daniel Pelot;Sharon Fujikawa-Brooks

562
Citations
Apoptosis Primarily Accounts for the Growth-inhibitory Properties of Sulindac Metabolites and Involves a Mechanism That Is Independent of Cyclooxygenase Inhibition, Cell Cycle Arrest, and p53 Induction

Gary A. Piazza;Alanna K. Rahm;Tyler S. Finn;Benjamin H. Fryer

548
Citations
Colorectal Cancer in Patients Under Close Colonoscopic Surveillance

Douglas J. Robertson;Douglas J. Robertson;E. Robert Greenberg;Michael Beach;Robert S. Sandler

536
Citations
Five-year colon surveillance after screening colonoscopy.

David A. Lieberman;David G. Weiss;William V. Harford;Dennis J. Ahnen

502
Citations
The Increasing Incidence of Young-Onset Colorectal Cancer: A Call to Action

Dennis J. Ahnen;Sally W. Wade;Whitney F. Jones;Randa Sifri

481
Citations
Sulindac Sulfone Inhibits Azoxymethane-induced Colon Carcinogenesis in Rats without Reducing Prostaglandin Levels

Gary A. Piazza;David S. Alberts;Lee J. Hixson;Nancy Shipp Paranka

444
Citations
Prevalence and Penetrance of Major Genes and Polygenes for Colorectal Cancer

Aung Ko Win;Mark A. Jenkins;James G Dowty;Antonis C Antoniou

441
Citations
Colorectal cancers soon after colonoscopy: a pooled multicohort analysis

Douglas J Robertson;David A Lieberman;Sidney J Winawer;Dennis J Ahnen

441
Citations
Ki-ras mutation and p53 overexpression predict the clinical behavior of colorectal cancer: a Southwest Oncology Group study.

Dennis J. Ahnen;Polly Feigl;Gang Quan;Cecelia Fenoglio-Preiser

434
Citations
Urinary Metabolites of Prostanoids and Risk of Recurrent Colorectal Adenomas in the Aspirin/Folate Polyp Prevention Study (AFPPS)

Veronika Fedirko;Patrick T. Bradshaw;Jane C. Figueiredo;Robert S. Sandler

425
Citations

Frequent Co-Authors

John A. Baron University of North Carolina at Chapel Hill

Polly A. Newcomb Fred Hutchinson Cancer Research Center

Robert W. Haile Stanford University

Robert S. Sandler University of North Carolina at Chapel Hill

John D. Potter Massey University

David A. Lieberman Oregon Health & Science University

Daniel D. Buchanan University of Melbourne

John L. Hopper University of Melbourne

Noralane M. Lindor Mayo Clinic

Mark A. Jenkins University of Melbourne

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