Ryan M. Gill, MD, PhD

Ryan M. Gill, MD, PhD

Director, Anatomic Pathology Laboratories, Helen Diller Medical Center at Parnassus Heights; Professor, Department of Pathology
Gastrointestinal and Hepatobiliary Pathology
Specialty Areas
Surgical Pathology
Liver Pathology
Gastrointestinal Pathology
Placental Pathology

Pathology, Box 0102
505 Parnassus Avenue, Room M-590
San Francisco, CA 94143
United States

Hospital Affiliations
UCSF Parnassus Heights
UCSF Mission Bay
Research and Clinical Interests

Dr. Ryan Gill is a Gastrointestinal and Hepatobiliary pathologist who specializes in the diagnosis and evaluation of adult and pediatric liver disease, liver transplantation, inflammatory bowel disease, and liver and gastrointestinal tract neoplasia and lymphoma. In his research, he focuses on diagnosis, prognosis and treatment options for medical liver disease (in particular NASH), liver transplantation, inflammatory bowel disease, liver/GI neoplasia, and extranodal lymphoma. Dr. Gill received an M.D. and Ph.D. at the University of Kansas in Kansas City, KS. He then completed a combined anatomic and clinical pathology residency, followed by fellowships in hematopathology and liver and gastrointestinal pathology at UCSF. Dr. Gill is a member of several professional organizations and was elected as a lifetime member of the International Liver Pathology Study Group (The ELVES) in 2017. Dr. Gill has published >120 books, chapters, and peer-reviewed articles and lectures around the world. He served as the final UCSF Director of Surgical Pathology (2017-2023), during which he oversaw sub-specialization of surgical pathology services, successful digital pathology implementation in surgical pathology, and creation of the UCSF Office of Research Tissue Acquisition Policy and the UCSF Biospecimen Processing Lab (BSPL).  Dr. Gill is a Professor in the UCSF Department of Pathology and Director of Anatomic Pathology Laboratories at the Helen Diller Medical Center at Parnassus Heights.

Selected Publications
  • Gill RM, Buelow B, Mather C, Joseph NM, Alves, V, Brunt EM, Liu T, Makhlouf H, Marginean C, Nalbantoglu I, Sempoux C, Snover DC, Thung SN, Yeh MM, Ferrell LD.  Hepatic Small Vessel Neoplasm, a Rare Infiltrative Vascular Neoplasm of Uncertain Malignant Potential.  Human Pathology.  2016, 10.1016/j.humpath.2016.03.018.
  • Tsai JH, Ferrell LD, Tan V, Yeh MM, Sarkar M, Gill RM.  Aggressive non-alcoholic steatohepatitis following rapid weight loss and/or malnutrition.  Modern Pathol. 2017, Mar 3.  PMID 28256569.
  • Roberts DE, Kakar S, Mehta N, Gill RM. A Point-based Histologic Scoring System for Hepatocellular Carcinoma can Stratify Risk of Posttransplant Tumor Recurrence. Am J Surg Pathol. 2018 Apr 11. doi: 10.1097/PAS.0000000000001053. [Epub ahead of print] PubMed PMID: 29649017.
  • Fels Elliott DR, Tavakol M, Lucas CH, Sheahon K, Kakar D, Hameed B, Ferrell LD, Gill RM. Clinicopathologic features and outcomes of parenchymal rejection in liver transplant biopsies [published online ahead of print, 2020 Jan 1]. Histopathology. 2020;10.1111/his.14058. doi:10.1111/his.14058
  • Gill RM, Allende D, Belt PH, Behling CA, Cummings OW, Guy CD, Carpenter D, Neuschwander-Tetri BA, Sanyal AJ, Tonascia J, Van Natta ML, Wilson LA, Yamada G, Yeh M, Kleiner DE.  The Nonalcoholic Steatohepatitis Extended Hepatocyte Ballooning Score: Histologic Classification and Clinical Significance. Hepatology Communications, 2023;7:e0033. https://doi.org/10.1097/HC9.0000000000000033

PubMed Link: https://doi.org/10.1097/HC9.0000000000000033

Notable Books/Chapters

  • I co-authored a chapter on medical liver pathology in Sternberg's Diagnostic Surgical Pathology, 6th and 7th editions.
  • I co-authored a chapter on tumor liver pathology in Silverberg's Principles and Practice of Surgical Pathology and Cytopathology, 5th edition
  • I co-authored a chapter on liver pathology in Robbins and Cotran, Pathologic Basis of Disease, 10th edition