
Alejandro Llanos Chea, MD
Pediatric Gastroenterologist
Assistant Professor at UT Southwestern Medical Center
- Languages Spoken:
- English, Spanish

Biography
Alejandro Llanos-Chea, M.D. is a Pediatric Gastroenterologist at Children’s Health℠ and Assistant Professor of Pediatrics at UT Southwestern Medical Center. Dr. Llanos-Chea is a part of our Pediatric Neurogastroenterology and GI Motility Program and is the Associate Director of the Multidisciplinary Pediatric Aerodigestive Clinic (MPAC). He provides care for children with a range of conditions including GI motility disorders, aerodigestive diseases and colorectal disorders.
“Neurogastroenterology and motility in kids is an area where there’s still a lot to learn. Children with these disorders often struggle to find providers who can understand their condition and symptoms. I’m passionate about providing them compassionate, personalized care – using cutting-edge testing and therapies.”
Dr. Llanos-Chea earned his medical degree at the Universidad of Peruana Cayetano Heredia and completed his pediatrics residency at Cook County Hospital in Chicago. He went on to pursue a pediatric gastroenterology fellowship at the Harvard University program at Massachusetts General Hospital and gain additional training in pediatric neurogastroenterology and motility at Boston Children's Hospital.
Dr. Llanos-Chea’s clinical and research interests include GI motility, aerodigestive disorders, anorectal and colorectal conditions and disorders of the gut-brain interaction.
In his free time, Dr. Llanos-Chea enjoys spending time with his wife and kids. He’s also a self-proclaimed “foodie” who loves to explore new restaurants in the Dallas area.
Education and Training
- Medical School
- Universidad Peruana Cayetano Heredia (2009)
- Residency
- John H. Stroger, Jr. Hospital of Cook County (2015), Pediatrics
- Fellowship
- Dana-Farber/Massachusetts General Hospital (2018), Pediatric Gastroenterology
- Board Certification
- American Board of Pediatrics/Gastroenterology
Conditions
- Abdominal migraines
- Achalasia
- Anorectal malformation (imperforate anus or ARM)
- Celiac disease
- Chronic abdominal pain (stomach ache)
- Cloacal anomaly
- Cloacal exstrophy
- Colic
- Colon polyps
- Colorectal cancer (CRC)
- Constipation
- Cyclic vomiting syndrome (CVS)
- Diarrhea
- Dysphagia (swallowing disorder)
- Encopresis
- Esophageal atresia (EA)
- Esophageal stricture
- Failure to thrive (FTT)
- Familial adenomatous polyposis (FAP)
- Feeding disorder (PFD)
- Functional abdominal pain syndrome (FAPS)
- Gastroenteritis (stomache flu)
- Gastroesophageal reflux disease (GERD)
- Gastrointestinal (GI) bleeding
- Gastroparesis
- Gastroschisis
- Hirschsprung's disease
- Intestinal pseudo-obstruction
- Irritable bowel syndrome (IBS)
- Lactose intolerance
- Malabsorption
- Microbiome imbalance (dysbiosis)
- Microscopic colitis (lymphocytic colitis or collagenous colitis)
- Nausea and vomiting
- Necrotizing enterocolitis (NEC)
- Pediatric H. pylori infection
- Peptic ulcer
- Rumination syndrome (merycism)
Treatments
- Pediatric endoscopic procedures
- Pediatric polypectomy
- Pediatric rectal suction biopsy
- Pediatric pH probe study
- Anorectal manometry
- Antroduodenal manometry
- Balloon dilatation for strictures and achalasia
- Botulinum toxin injections
- Colonic manometry
- EndoFLIP/impedance panimetry
- Esophageal manometry
- Wireless pH monitoring
Departments and Programs
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Research Interests
- Aerodigestive diseases
- Colorectal disorders
- GI motility in special populations
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Publications
- Ineffective esophageal motility: Characterization and outcomes across pediatric neurogastroenterology and motility centers in the United States TA Davis, BD Rogers, A Llanos‐Chea, A Krasaelap, D Banks, ... Journal of pediatric gastroenterology and nutrition 79 (3), 541-549
- Su2039 A CENTRALIZED INTERPRETATION OF DE-IDENTIFIED PEDIATRIC HIGH-RESOLUTION MANOMETRY STUDIES FROM A MULTICENTER COHORT: CHICAGO CLASSIFICATION V4. 0 PROTOCOL IS OFTEN NOT … TA Davis, BD Rogers, A Llanos-Chea, A Krasaelap, D Banks, ... Gastroenterology 166 (5), S-902
- Novel Mutation in the SLC5A1 Gene Causing Glucose-Galactose Malabsorption: First Confirmed Case From Central America. DT Katz, S Curia, AC Fifi, L Febo-Rodriguez, A Llanos-Chea. JPGN reports 4 (4), e390
- COVID-19 and the gastrointestinal tract in children C Riera-Canales, A Llanos-Chea. Current opinion in pediatrics 35 (5), 585-589.
- Mo2002 INEFFECTIVE ESOPHAGEAL MOTILITY: CHARACTERIZATION AND OUTCOMES ACROSS PEDIATRIC NEUROGASTROENTEROLOGY AND MOTILITY CENTERS IN THE US. TA Davis, BD Rogers, A Llanos-Chea, A Krasaelap, C Desai, ... Gastroenterology 164 (6), S-949-S-950
- Eosinophilic esophagitis after pediatric hematopoietic stem cell transplantation. D Cheung, DT Katz, A Webster-Carrion, AG Saad, A Fifi, A Llanos-Chea, ... Journal of pediatric gastroenterology and nutrition 75 (6), e117-e118
- PROBIOTICS FOR TREATMENT OF CHRONIC CONSTIPATION IN CHILDREN: A COCHRANE SYSTEMATIC REVIEW. M Gordon, V Sinopoulou, C Wallace, A Llanos-Chea, G Hungria, ...
- GASTROENTEROLOGY 162 (7), S774-S774
- Anorectal Disorders in the Era of Telemedicine. DT Katz, M Saps, A Llanos-Chea, L Febo-Rodriguez. Journal of pediatric gastroenterology and nutrition 74 (2), e40-e41
- Probiotics for treatment of chronic constipation in children. M Gordon, AK Akobeng, A Llanos-Chea, G Hungria, L Febo-Rodriguez, ... Cochrane Database of Systematic Reviews
- Mo1441: PROBIOTICS FOR TREATMENT OF CHRONIC CONSTIPATION IN CHILDREN: A COCHRANE SYSTEMATIC REVIEW. M Gordon, V Sinopoulou, C Wallace, A Llanos-Chea, G Hungria, ... Gastroenterology (New York, NY 1943) 162 (7), S-774-S-774
- Probiotics for treatment of chronic constipation in children. C Wallace, V Sinopoulou, M Gordon, AK Akobeng, A Llanos-Chea, ... The Cochrane Database of Systematic Reviews 2022 (3)
- A versatile human intestinal organoid-derived epithelial monolayer model for the study of enteric pathogens. KP Nickerson, A Llanos-Chea, L Ingano, G Serena, A Miranda-Ribera, ... Microbiology spectrum 9 (1), 10.1128/spectrum. 00003-21
- Utility of the Brussels Infant and Toddler Stool Scale (BITSS) and Bristol Stool Scale in non‐toilet‐trained children: a large comparative study. CA Velasco‐Benitez, A Llanos‐Chea, M Saps. Neurogastroenterology & Motility 33 (8), e14015
- Lymphoma in pediatric-onset inflammatory bowel disease treated with infliximab monotherapy: A case series. A Llanos-Chea, JM Shapiro, RW Winter, L Jerger, T Menz, M Gibson, ... Digestive diseases and sciences, 1-7
- The great ESKAPE: exploring the crossroads of bile and antibiotic resistance in bacterial pathogens. KS Gipson, KP Nickerson, E Drenkard, A Llanos-Chea, SK Dogiparthi, ... Infection and immunity 88 (10), 10.1128/iai. 00865-19
- Shigella flexneri Adherence Factor Expression in In Vivo-Like Conditions. RB Chanin, KP Nickerson, A Llanos-Chea, JR Sistrunk, DA Rasko, ... Msphere 4 (6), 10.1128/msphere. 00751-19
- Inter-observer reliability for stool consistency between the bristol stool scale and the Brussels Infant and Toddler Stool Scale (BITSS) when using Rome IV criteria in younger … A Llanos-Chea, CA Velasco-Benitez, M Saps. NEUROGASTROENTEROLOGY AND MOTILITY 31
- Utility of diagnostic tests in children with functional abdominal pain disorders. A Llanos-Chea, M Saps. Gastroenterology & hepatology 15 (8), 414
- Bacteriophage therapy testing against Shigella flexneri in a novel human intestinal organoid-derived infection model. A Llanos-Chea, RJ Citorik, KP Nickerson, L Ingano, G Serena, S Senger, ... Journal of pediatric gastroenterology and nutrition 68 (4), 509-516
- Recurrent severe iron deficiency anemia and thrombocytopenia in an adolescent male. L Giordano, A Llanos-Chea, A Monde, I Mulinge, D Dighe. Journal of pediatric hematology/oncology 41 (2), e116-e118
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Professional Activities
- American Neurogastroenterology and Motility Society (ANMS) – Member
- Dallas County Medical Society and Texas Medical Association - Member
- International Foundation for Gastrointestinal Disorders (IFFGD) – Junior Academician
- NASPGHAN – Member
- North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition
- The Cochrane Collaboration - Member/Collaborator
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Awards and Honors
- Poster of Distinction (2023) NASPGHAN Annual Meeting (San Diego, CA – USA); North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition (NASPGHAN)
- AGA Fellow Abstract Prize (2018) American Gastroenterological Association (AGA) Research Foundation
- Senior Teaching Award (2015) John H. Stroger Jr. Hospital of Cook County – Pediatrics Residency Program
- Intern of the Year Award (2013) John H. Stroger Jr. Hospital of Cook County – Pediatrics Residency Program
- Research Institutional Award (2006) Universidad Peruana Cayetano Heredia, Lima, Peru.