Ryan M. Gill, MD, PhD
UCSF
Pathology, Box 0102
505 Parnassus Avenue, Room M-590
San Francisco, CA 94143
United States
Ryan M. Gill, MD, PhD, is Professor of Pathology at the University of California, San Francisco (UCSF). He previously served for six years as UCSF Director of Surgical Pathology and for ten years as Director of the Anatomic Pathology Laboratories at the UCSF Helen Diller Medical Center at Parnassus Heights.
An internationally recognized expert in liver and gastrointestinal pathology, Dr. Gill specializes in adult and pediatric medical liver disease, liver transplantation, liver tumors, extranodal lymphoma, and inflammatory bowel disease. His research focuses on metabolic dysfunction-associated steatotic liver disease and liver neoplasia.
Dr. Gill has authored more than 150 publications and has contributed to major reference texts, including Robbins & Cotran Pathologic Basis of Disease and Mills and Sternberg’s Diagnostic Surgical Pathology. He serves as a series editor for Elsevier’s Surgical Pathology: A Case-Based Approach and as an editor of the series’ second volume, Gastrointestinal Pathology and Liver Metastases. He is also a contributing author to the forthcoming Tumors of the Liver (AFIP Atlas of Tumor Pathology, Series 5).
Dr. Gill earned his MD and PhD from the University of Kansas and completed his pathology residency and fellowships in hematopathology and gastrointestinal/liver pathology at UCSF. He is a lifetime member of the International Liver Pathology Study Group (The ELVES) and provides expert hepatopathology and gastrointestinal pathology consultations worldwide.
- 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
- Gill RM and Theise N. Vascular liver disease - emerging concepts in the sinusoidal space. Clinics in Liver Disease. 2025, in press, corrected proof, May 23, 2025.
PubMed Link: https://doi.org/10.1097/HC9.0000000000000033