A photo of Gregory Tiao.

Director, Division of General and Thoracic Surgery

Frederick C. Ryckman Chair in Pediatric Surgery

Surgical Director, Liver Transplantation

Associate Director, Pediatric Surgery Fellowship

Professor, UC Department of SurgeryUC Department of Pediatrics



Board Certified

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My Biography & Research


During my training, I cared for several infants with biliary atresia — one of them requiring a liver transplantation to survive. The infants and their families had to go through so much with very little understanding of why the disease occurred. I decided to focus on this disease process, pursuing both pediatric surgery and transplant training so I could care for a child with biliary atresia from diagnosis through liver transplantation, when necessary.

As a pediatric and pediatric abdominal transplant surgeon, my focus is on hepatobiliary (liver and biliary system) disease, pediatric surgical oncology (especially liver tumors) and solid organ transplantation. While working with patients has been a major focus, I also have established and contributed to bench and clinical research programs developing new treatment strategies to improve outcomes in the care of children afflicted with chronic liver disease and liver tumors. Because of these programs, we use the most cutting-edge approaches in the treatment algorithms of patients.

In my bench research program, we are seeking to understand the pathogenic basis of biliary atresia. From a clinical research standpoint, I developed and lead an international clinical research trial focused on the liver tumors hepatoblastoma and hepatocellular carcinoma. With this information, we hope to develop new treatment strategies to alter the disease course and reduce the need for liver transplantation.

I hold the honorary chair named after the founder of the liver transplantation program at Cincinnati Children's, Dr. Frederick C. Ryckman. I speak Mandarin and my last name in Chinese is derived from the character used to describe a knife, which is quite appropriate!

Additional Languages


Clinical Interests

Biliary atresia

Academic Affiliation

Professor, UC Department of SurgeryUC Department of Pediatrics

Clinical Divisions

Colorectal Disorders, Liver Care, Kidney Transplant, End-Stage Renal Disease, Liver Tumor, Intestinal Disorders, Surgery - General and Thoracic, Pancreas Care, Liver Transplant, Fontan Management, Kidney Tumor Clinic

Research Divisions

General and Thoracic Surgery

My Locations

My Education

BS: Northwestern University, Evanston, IL, 1986.

MD: University of Illinois, Chicago, IL, 1990.

Residency: Loyola University, Maywood, IL, 1991-1992; Senior Resident, Department of Surgery, University of Cincinnati, Cincinnati, OH, 1995-1997; Chief Resident, Department of Surgery, University of Cincinnati, Cincinnati, OH, 1997-1998.

Fellowships: Research Fellow, University of Cincinnati, Cincinnati, OH, 1992-1995; Transplant Surgery Fellow, University of Cincinnati, Cincinnati, OH, 2000-2002; Pediatric Surgery Fellow, Los Angeles Children's Hospital, Los Angeles, CA, 1998-2000.

Certification: Pediatric Surgeon, 2000; Transplant Surgeon, 2002.

My Publications

Congenital lung overinflation secondary to a unilateral obstructing mediastinal bronchogenic cyst. Wagner, ML; Hart, CK; Benscoter, D; Fleck, RJ; Tiao, GM. Journal of Pediatric Surgery Case Reports. 2020; 60:101570-101570.

Natural Course of Pediatric Portal Hypertension. Kassam, A; Goddard, GR; Johnston, ME; Cortez, AR; Trout, AT; Jenkins, TM; Miethke, AG; Campbell, KM; Bezerra, JA; Balistreri, WF; et al. Hepatology Communications. 2020; 4:1346-1352.

Clinical heterogeneity of pediatric hepatocellular carcinoma. D'Souza, AM; Towbin, AJ; Gupta, A; Alonso, M; Nathan, JD; Bondoc, A; Tiao, G; Geller, JI. Pediatric Blood and Cancer. 2020; 67.

Evaluation of the diagnostic biopsy approach for children with hepatoblastoma: A report from the children's oncology group AHEP 0731 liver tumor committee. Weldon, CB; Madenci, AL; Tiao, GM; Dunn, SP; Langham, MR; McGahren, ED; Ranganathan, S; Lopez-Terrada, DH; Finegold, MJ; Malogolowkin, MH; et al. Journal of Pediatric Surgery. 2020; 55:655-659.

Rotavirus Reassortant–Induced Murine Model of Liver Fibrosis Parallels Human Biliary Atresia. Mohanty, SK; Lobeck, I; Donnelly, B; Dupree, P; Walther, A; Mowery, S; Coots, A; Bondoc, A; Sheridan, RM; Poling, HM; et al. Hepatology. 2020; 71:1316-1330.

Congenital Portosystemic Shunts in Children: Associations, Complications, and Outcomes. DiPaola, F; Trout, AT; Walther, AE; Gupta, A; Sheridan, R; Campbell, KM; Tiao, G; Bezerra, JA; Bove, KE; Patel, M; et al. Digestive Diseases and Sciences. 2020; 65:1239-1251.

Innate Immunity and Pathogenesis of Biliary Atresia. Ortiz-Perez, A; Donnelly, B; Temple, H; Tiao, G; Bansal, R; Mohanty, SK. Frontiers in Immunology. 2020; 11.

Surgical management of locally-advanced and metastatic hepatoblastoma. Lake, CM; Tiao, GM; Bondoc, AJ. Seminars in Pediatric Surgery. 2019; 28:150856-150856.

The role of surgical shunts in the treatment of pediatric portal hypertension. Cortez, AR; Kassam, A; Jenkins, TM; Nathan, CJ; Nathan, JD; Alonso, MH; Ryckman, FC; Tiao, GM; Bondoc, AJ. Surgery. 2019; 166:907-913.

Prospective Assessment of Ultrasound Shear Wave Elastography for Discriminating Biliary Atresia from other Causes of Neonatal Cholestasis. Dillman, JR; DiPaola, FW; Smith, SJ; Barth, RA; Asai, A; Lam, S; Campbell, KM; Bezerra, JA; Tiao, GM; Trout, AT. The Journal of Pediatrics. 2019; 212:60-65.e3.