AhmedAlyMessallamMD

Gastroenterology • Marietta, GA

Advanced Endoscopic Interventional

Gastroenterologist - Wellstar Medical Group @ Marietta | Wellstar Kennestone Hospital

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Office
780 Canton Rd NE
Suite 4075
Marietta, GA 30060
Phone+1 470-267-1760

Fax+1 470-986-7116
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Summary

Dr. Ahmed Messallam is a gastroenterologist in Atlanta, GA and practices at Piedmont Atlanta Hospital. He received his medical degree from University of Alexandria Faculty of Medicine, and completed his internal medicine, gastroenterology and advanced endoscopy training at Emory University. He is experienced in interventional gastroenterology, biliary tract and pancreatic diseases.

Education & Training

Emory University School of MedicineFellowship, Gastroenterology, 2017 - 2020
Emory University School of MedicineResidency, Internal Medicine, 2014 - 2018
Johns Hopkins UniversityGastroenterology, 2013 - 2014
University of Alexandria Faculty of MedicineClass of 2011

Certifications & Licensure

GA State Medical License 2015 - 2024
American Board of Internal Medicine Internal Medicine
American Board of Internal Medicine Gastroenterology

Publications & Presentations

PubMed

1 citations
Lymph node involvement in gastric adenocarcinoma
Rosemary Nustas, Ahmed A. Messallam, Theresa W. Gillespie, Steven Keilin, Saurabh Chawla, Vaishali Patel, Qiang Cai, Field F. Willingham> ;Surgical Endoscopy. 2021 Aug 31
Direct Endoscopic Necrosectomy With and Without Hydrogen Peroxide for Walled-off Pancreatic Necrosis: A Multicenter Comparative Study.
Ahmed A Messallam, Douglas G Adler, Raj J Shah, Jose M Nieto, Robert Moran, B Joseph Elmunzer, Natalie Cosgrove, Dan Mullady, Harkirat Singh, Gregory Cote, Georgios I ...> ;The American Journal of Gastroenterology. 2021 Apr 1
9 citations
Impact of early aggressive fluid resuscitation in acute pancreatitis
Ahmed A. Messallam, Cameron B. Body, Stephen Berger, Sonali Sakaria, Saurabh Chawla> ;Pancreatology. 2021 Jan 1
2 citations
Direct Endoscopic Necrosectomy With and Without Hydrogen Peroxide for Walled-off Pancreatic Necrosis: A Multicenter Comparative Study.
Ahmed A. Messallam, Douglas G. Adler, Raj J. Shah, Jose Nieto, Robert A. Moran, B. Joseph Elmunzer, Natalie Cosgrove, Dan Mullady, Harkirat Singh, Gregory A. Cote, Geo...> ;The American Journal of Gastroenterology. 2021 Apr 1
Delayed Tension Symptomatic Pneumoperitoneum After POEM Requiring Needle Decompression.
Brian McGrath, Lucie F. Calderon, Mengdan Xie, Ahmed A. Messallam, Hikaru Masuda, Huimin Chen, Steven Keilin, Qiang Cai> ;The American Journal of Gastroenterology. 2021 Feb 1
1 citations
The evolution of EUS-guided cystogastrostomy for pancreatic fluid collections.
Ahmed A. Messallam, Steven Keilin, Qiang Cai, Field F. Willingham> ;Videogie. 2019 Aug 1
45 citations
Stylet slow-pull versus standard suction for endoscopic ultrasound-guided fine-needle aspiration of solid pancreatic lesions: a multicenter randomized trial
Payal Saxena, Mohamad H. El Zein, Tyler Stevens, Ahmed Abdelgelil, Ahmed A. Messallam, Vivek Kumbhari, Alba Azola, Jennifer Brainard, Eun Ji Shin, Anne Marie Lennon, M...> ;Endoscopy. 2018 May 1
89 citations
International multicenter comparative trial of transluminal EUS-guided biliary drainage via hepatogastrostomy vs. choledochoduodenostomy approaches
Mouen A. Khashab, Ahmed A. Messallam, Irene PeñAs, Yousuke Nakai, Rani J. Modayil, Carlos De la Serna, Kazuo Hara, Mohamad H. El Zein, Stavros N. Stavropoulos, Manuel ...> ;Endoscopy International Open. 2016 Jan 15
53 citations
Comprehensive analysis of efficacy and safety of peroral endoscopic myotomy performed by a gastroenterologist in the endoscopy unit: a single-center experience.
Mouen A. Khashab, Mohamad H. El Zein, Vivek Kumbhari, Sepideh Besharati, Saowanee Ngamruengphong, Ahmed A. Messallam, Ahmed Abdelgalil, Payal Saxena, Alan H. Tieu, Shr...> ;Gastrointestinal Endoscopy. 2016 Jan 1
42 citations
Comparison of EUS-guided tissue acquisition using two different 19-gauge core biopsy needles: a multicenter, prospective, randomized, and blinded study
John M. DeWitt, Chang-Min Cho, Jingmei Lin, Mohammad A. Al-Haddad, Marcia I. Canto, Ashley Salamone, Ralph H. Hruban, Ahmed A. Messallam, Mouen A. Khashab> ;Endoscopy International Open. 2015 Jun 24
132 citations
International multicenter experience with peroral endoscopic myotomy for the treatment of spastic esophageal disorders refractory to medical therapy (with video)
Mouen A. Khashab, Ahmed A. Messallam, Manabu Onimaru, Ezra N. Teitelbaum, Michael B. Ujiki, Matthew E. Gitelis, Rani J. Modayil, Eric S. Hungness, Stavros N. Stavropou...> ;Gastrointestinal Endoscopy. 2015 May 1
162 citations
Peroral endoscopic myotomy (POEM) vs laparoscopic Heller myotomy (LHM) for the treatment of Type III achalasia in 75 patients: a multicenter comparative study
Vivek Kumbhari, Alan H. Tieu, Manabu Onimaru, Mohammad H. El Zein, Ezra N. Teitelbaum, Michael B. Ujiki, Matthew E. Gitelis, Rani J. Modayil, Eric S. Hungness, Stavros...> ;Endoscopy International Open. 2015 Apr 13
10 citations
Intraoperative determination of the adequacy of myotomy length during peroral endoscopic myotomy (POEM): the double-endoscope transillumination for extent confirmation...
Mouen A. Khashab, Vivek Kumbhari, Alba Azola, Mohamad H. El Zein, Ahmed A. Messallam, Ahmed Abdelgelil, Anthony N. Kalloo, Payal Saxena, Sepideh Besharati> ;Endoscopy. 2015 Apr 7
7 citations
Iatrogenic pharyngoesophageal perforations treated with fully covered self-expandable metallic stents (with video).
Vivek Kumbhari, Alba Azola, Alan H. Tieu, Reetika Sachdeva, Payal Saxena, Ahmed A. Messallam, Mohamad H. El Zein, Patrick I. Okolo, Mouen A. Khashab> ;Surgical Endoscopy. 2015 Apr 1
140 citations
A comparative evaluation of EUS-guided biliary drainage and percutaneous drainage in patients with distal malignant biliary obstruction and failed ERCP.
Mouen A. Khashab, Ali Kord Valeshabad, Elham Afghani, Vikesh K. Singh, Vivek Kumbhari, Ahmed A. Messallam, Payal Saxena, Mohamad H. El Zein, Anne Marie Lennon, M. I. C...> ;Digestive Diseases and Sciences. 2015 Feb 1
18 citations
Submucosal tunneling endoscopic resection of a giant esophageal leiomyoma.
Vivek Kumbhari, Payal Saxena, Alba Azola, Ahmed A. Messallam, Mohamad H. El Zein, Mouen A. Khashab> ;Gastrointestinal Endoscopy. 2015 Jan 1
8 citations
Submucosal endoscopy: the new frontier of therapeutic endoscopy.
Mouen A. Khashab, Ahmed A. Messallam, Mohamad H. El Zein, Vivek Kumbhari> ;Current Opinion in Gastroenterology. 2014 Sep 1
17 citations
Resolution of walled-off pancreatic necrosis by EUS-guided drainage when using a fully covered through-the-scope self-expandable metal stent in a single procedure (wit...
Payal Saxena, Vikesh K. Singh, Ahmed A. Messallam, Ayesha Kamal, Atif Zaheer, Vivek Kumbhari, Anne Marie Lennon, Marcia I. Canto, Anthony N. Kalloo, Todd H. Baron, Mou...> ;Gastrointestinal Endoscopy. 2014 Aug 1
13 citations
Deep enteroscopy with standard endoscopes using a novel through-the-scope balloon
Vivek Kumbhari, Andrew C. Storm, Mouen A. Khashab, Marcia I. Canto, Payal Saxena, Venkata S. Akshintala, Ahmed A. Messallam, Vikesh K. Singh, Anne-Marie Lennon, Eun Ji...> ;Endoscopy. 2014 Jul 23
9 citations
EUS-guided angiotherapy.
Andrew C. Storm, Vivek Kumbhari, Payal Saxena, Marcia I. Canto, Alba Azola, Ahmed A. Messallam, Anne Marie O’Broin-Lennon, Mouen A. Khashab> ;Gastrointestinal Endoscopy. 2014 Jul 1
1 citations
Pilot study of ‘Scissorhands’ technique for gastric endoscopic submucosal dissection using novel gel and endoscopic scissors in a porcine model (with video)
Mouen A. Khashab, Payal Saxena, Reem Z. Sharaiha, Ahmed A. Messallam, Venkata S. Akshintala, Vikesh K. Singh, Anne Marie Lennon, Marcia I. Canto, Anthony N. Kalloo, Pa...> ;Digestive Endoscopy. 2014 May 1
120 citations
Multicenter comparative evaluation of endoscopic placement of expandable metal stents for malignant distal common bile duct obstruction by ERCP or EUS-guided approach
Vinay Dhir, Takao Itoi, Mouen A. Khashab, Do Hyun Park, Anthony Yuen Bun Teoh, Rajeev Attam, Ahmed A. Messallam, Shyam Varadarajulu, Amit Maydeo> ;Gastrointestinal Endoscopy. 2014 May 1
1 citations
Fenestration of a covered metal stent during cystoduodenostomy using argon plasma coagulation.
Alan H. Tieu, Payal Saxena, Vikesh K. Singh, Anne Marie Lennon, Vivek Kumbhari, Ahmed A. Messallam, Mohamad H. El Zein, Anthony N. Kalloo, Mouen A. Khashab> ;Endoscopy. 2014 Jan 1
4 citations
Large bleeding rectal varices treated with endoscopic ultrasound-guided coiling and cyanoacrylate injection.
Ahmed A. Messallam, Vivek Kumbhari, Payal Saxena, Alba Azola, Anthony N. Kalloo, Mouen A. Khashab> ;Endoscopy. 2014 Jan 1
11 citations
Duodenal perforation as a consequence of biliary stent migration can occur regardless of stent type or duration.
Mohamad H. El Zein, Vivek Kumbhari, Alan H. Tieu, Payal Saxena, Ahmed A. Messallam, Alba Azola, Zhiping Li, Matthew J. Weiss, Mouen A. Khashab> ;Endoscopy. 2014 Jan 1
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Hospital Affiliations

Piedmont Atlanta HospitalAtlanta, Georgia