Christopher Hamerski

ORCID: 0000-0002-8262-8648
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About
Contact & Profiles
Research Areas
  • Esophageal and GI Pathology
  • Neuroendocrine Tumor Research Advances
  • Gastric Cancer Management and Outcomes
  • Colorectal Cancer Screening and Detection
  • Gallbladder and Bile Duct Disorders
  • Biliary and Gastrointestinal Fistulas
  • Pancreatic and Hepatic Oncology Research
  • Metastasis and carcinoma case studies
  • Colorectal Cancer Surgical Treatments
  • Foreign Body Medical Cases
  • Abdominal vascular conditions and treatments
  • Gastrointestinal Bleeding Diagnosis and Treatment
  • Liver Disease Diagnosis and Treatment
  • Pediatric Hepatobiliary Diseases and Treatments
  • Tattoo and Body Piercing Complications
  • Infectious Aortic and Vascular Conditions
  • Celiac Disease Research and Management
  • Neuroblastoma Research and Treatments
  • Gastrointestinal motility and disorders
  • Parasitic Diseases Research and Treatment
  • Aortic aneurysm repair treatments
  • Abdominal Surgery and Complications
  • Diverticular Disease and Complications
  • Gastrointestinal Tumor Research and Treatment
  • Vascular anomalies and interventions

Kaiser Permanente San Francisco Medical Center
2022-2024

California Pacific Medical Center
2014-2022

RELX Group (Netherlands)
2021

University of California, Irvine Medical Center
2011

Techniques to optimize endoscopic ultrasound-guided tissue acquisition (EUS-TA) in a variety of lesion types have not yet been established. The primary aim this study was compare the diagnostic yield (DY) fine needle aspiration (EUS-FNA) biopsy (EUS-FNB) for pancreatic and non-pancreatic masses.Consecutive patients referred EUS-TA underwent randomization EUS-FNA or EUS-FNB at four tertiary-care medical centers. A maximum three passes were allowed initial method crossed over other arm based...

10.1055/s-0042-106958 article EN cc-by-nc-nd Endoscopy International Open 2016-05-20

BACKGROUND : This study evaluated an oroenteric catheter (OEC)-assisted technique to distend the enteric loop for endoscopic ultrasound-guided gastroenterostomy (EUS-GE) in patients with gastric outlet obstruction (GOO). METHODS Patient outcomes were reviewed. Proximal loops filled water via OEC (7 Fr or 8 Fr), providing a target EUS-GE using lumen-apposing metal stent (15-mm caliber). Clinical success was defined as toleration of non-liquid diet by Day 3. RESULTS 42 (mean age 73.1 [SEM 2.8]...

10.1055/a-1392-0904 article EN Endoscopy 2021-04-15

ABSTRACT Chronic octreotide use has been associated with gallstone formation. Historically, cholecystectomy the defining treatment for those who have gallstone-related disease. For are poor surgical candidates, percutaneous and endoscopic approaches used. We describe management of a 74-year-old man significant burden sequelae because chronic metastatic neuroendocrine tumor through ultrasound-guided cholecystoduodenostomy extraction using lumen-apposing metal stents.

10.14309/crj.0000000000001306 article EN cc-by-nc-nd ACG Case Reports Journal 2024-03-01

Superior mesenteric artery syndrome (SMAS) is a rare condition in which the superior (SMA) impinges on third portion of duodenum leading to symptoms gastric outlet obstruction.1Lee C.S. Mangla J.C. compression syndrome.Am J Gastroenterol. 1978; 70: 141-150PubMed Google Scholar When conservative management fails, surgical intervention may be required. In patients who are not candidates or decline surgery, EUS-guided gastroenterostomy (EUS-GE) using cautery-enhanced lumen-apposing metal stent...

10.1016/j.vgie.2020.09.008 article EN cc-by-nc-nd VideoGIE 2020-11-02

Abstract Background Colonic anastomotic leaks are associated with significant morbidity and mortality. Whereas small case series suggest that fully covered self-expandable metal stents (FCSEMS) effective, no larger studies have examined the impact of combination endoscopic therapy on colonic leaks. Methods Our retrospective cohort study reviewed 51 patients undergoing for between 2011 2018. Patients receiving involving FCSEMS plus local closure (n = 24) were compared alone 18) or suturing...

10.1055/a-1176-0967 article EN Endoscopy 2020-06-10

INTRODUCTION: Despite studies showing improved safety, efficacy, and cost-effectiveness of endoscopic resection for nonmalignant colorectal polyps, colectomy rates polyps have been increasing in the United States Europe. Given this alarming trend, we aimed to investigate whether are or declining a large, integrated, community-based healthcare system with access advanced procedures. METHODS: We identified all individuals aged 50–85 years who underwent colonoscopy between 2008 2018 were...

10.14309/ctg.0000000000000477 article EN cc-by-nc-nd Clinical and Translational Gastroenterology 2022-03-28

An 82-year-old woman presented with 3 days of epigastric and right upper quadrant abdominal pain, nausea, vomiting. She was afebrile had a bilirubin level 2.9 mg/dL without leukocytosis or eosinophilia. Peak aspartate aminotransferase, alanine alkaline phosphatase, lipase levels were 675, 708, 236, 7366 U/L, respectively. CT contrast showed mild gallbladder wall thickening no stones pericholecystic fluid. Bile ducts pancreas appeared normal. EUS the distal common bile duct revealed 5-mm thin...

10.1016/j.vgie.2020.06.002 article EN cc-by-nc-nd VideoGIE 2020-07-10

Background and AimsPostoperative leaks of the foregut are associated with significant morbidity mortality. While there is extensive data on use luminal stents for treatment esophageal postbariatric leaks, limited exists regarding endoscopic management gastroenteric leaks.MethodsOur single-center retrospective cohort study reviewed 31 patients undergoing therapy nonbariatric postoperative between 2011 2018. Fifteen who received at least one combination (CET) procedure involving placement a...

10.1016/j.tige.2020.11.003 article EN other-oa Techniques and Innovations in Gastrointestinal Endoscopy 2020-12-02

Introduction: Low-Phospholipid Associated Cholelithiasis (LPAC) is a rare genetic disease that leads to recurrent intrahepatic lithiasis due decrease in phosphatidylcholine secretion rather than excess cholesterol secretion. It associated with mutation the ABCB4 gene, which codes for protein involved phospholipid transport. We present case of LPAC classic endoscopic ultrasound findings and variant gene. Case Description/Methods: A 30-year-old Caucasian female presented 1 year prior right...

10.14309/01.ajg.0000958424.82475.52 article EN The American Journal of Gastroenterology 2023-10-01

Introduction: Chronic octreotide is a risk factor for the development of gallstones (GS). Percutaneous and endoscopic management have been utilized in patients who are poor surgical candidates, usually to treat acute complications such as cholecystitis. We present case EUS-guided cholecystoduodenostomy (EUS-CD) extract GS patient with biliary colic recurrent cholangitis setting chronic associated disease, where gallbladder (GB) decompression alone would not be sufficient alleviate his...

10.14309/01.ajg.0000963080.47211.19 article EN The American Journal of Gastroenterology 2023-10-01

Video 1Narration of case and demonstration overture-mediated lumen-apposing metal stent placement for removal retained capsule endoscopy.

10.1016/j.vgie.2021.12.004 article EN cc-by-nc-nd VideoGIE 2022-01-26
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