John G. Karstensen

Copenhagen, Denmark

Last Updated: 09/26/2026

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Found 141 publications

Top-down versus step-up approach after endoscopic ultrasound-guided drainage of infected walled-off necrosis: a randomized controlled trial.

Top-down versus step-up approach after endoscopic ultrasound-guided drainage of infected walled-off necrosis: a randomized controlled trial.

Journal: Endoscopy
Published: June 01, 2026

Reply to Asokkumar et al.

Reply to Asokkumar et al.

Journal: Endoscopy
Published: March 20, 2026

Familial Adenomatous Polyposis-Risk of Cancer, Cancer Prevention, and Long-Term Consequences: Learnings from Five Decades with the Danish Polyposis Register.

Familial Adenomatous Polyposis-Risk of Cancer, Cancer Prevention, and Long-Term Consequences: Learnings from Five Decades with the Danish Polyposis Register.

Journal: APMIS : acta pathologica, microbiologica, et immunologica Scandinavica
Published: March 06, 2026

Management of walled-off pancreatic necrosis (WON) beyond the conventional step-up strategy: a retrospective cohort study.

Management of walled-off pancreatic necrosis (WON) beyond the conventional step-up strategy: a retrospective cohort study.

Journal: Surgical endoscopy
Published: December 10, 2025

In sphincter of Oddi patients, amelioration of pain is primarily associated with common bile duct dilation rather than hepatobiliary scintigraphy excretion time or alanine amino transferase - a single centre, retrospective study.

In sphincter of Oddi patients, amelioration of pain is primarily associated with common bile duct dilation rather than hepatobiliary scintigraphy excretion time or alanine amino transferase - a single centre, retrospective study.

Journal: Clinical physiology and functional imaging
Published: December 09, 2025

From Old Battles Won to New Frontiers in Familial Adenomatous Polyposis.

From Old Battles Won to New Frontiers in Familial Adenomatous Polyposis.

Journal: Gastroenterology
Published: November 28, 2025

Performance measures for endoscopic ultrasound: a European Society of Gastrointestinal Endoscopy (ESGE) Quality Improvement Initiative - Update 2025.

Performance measures for endoscopic ultrasound: a European Society of Gastrointestinal Endoscopy (ESGE) Quality Improvement Initiative - Update 2025.

Journal: Endoscopy
Published: November 12, 2025

Gastric Peroral Endoscopic Pyloromyotomy (G-POEM) Is Effective in the Treatment of Diabetic Gastroparesis: A Randomized, Double-Blinded, Sham-Controlled Trial.

Gastric Peroral Endoscopic Pyloromyotomy (G-POEM) Is Effective in the Treatment of Diabetic Gastroparesis: A Randomized, Double-Blinded, Sham-Controlled Trial.

Journal: Gastroenterology
Published: September 21, 2025

Commentary.

Commentary.

Journal: Endoscopy
Published: August 28, 2025

Correction: Optimal timing for lumen-apposing metal stent removal following endoscopic ultrasound-guided drainage of pancreatic fluid collections: a systematic review and meta-analysis.

Correction: Optimal timing for lumen-apposing metal stent removal following endoscopic ultrasound-guided drainage of pancreatic fluid collections: a systematic review and meta-analysis.

Journal: Endoscopy
Published: August 28, 2025

Response to Letter to Editor "Accurately Predicting Outcomes in Acute Necrotizing Pancreatitis With Walled-Off Necrosis Patients" by Shangzhu Chen and Chengdong Tang.

Response to Letter to Editor "Accurately Predicting Outcomes in Acute Necrotizing Pancreatitis With Walled-Off Necrosis Patients" by Shangzhu Chen and Chengdong Tang.

Journal: Pancreas
Published: August 19, 2025

Training esophagogastroduodenoscopy skills: a randomized multicenter trial comparing simulation-based training versus clinical training.

Training esophagogastroduodenoscopy skills: a randomized multicenter trial comparing simulation-based training versus clinical training.

Journal: Endoscopy
Published: August 19, 2025
Showing 1-12 of 141

Last Updated: 09/26/2026