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Ryan Lokken, MD

Title(s)Assistant Professor, Radiology
SchoolSchool of Medicine
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    R. Peter Lokken earned his Master’s degree in Public Health at the Harvard School of Public Health (2006) and his MD (2007) from Harvard Medical School in Boston, MA. He completed a one-year Internal Medicine internship at UC San Diego (2008). Lokken’s four-year diagnostic radiology residency was at the Brigham and Women’s Hospital in Boston, MA (2008-2012). Lokken completed a one-year Interventional Radiology fellowship at UCSF in 2013. In 2013, he joined the University of Illinois Hospital Health & Science Center in Chicago as a radiologist specializing in vascular interventional radiology. In June 2018, he rejoined UCSF as an assistant professor of clinical radiology in the department’s Interventional Section.

    Lokken is an associate editor for the Journal of Vascular and Interventional Radiology, the scientific journal of the Society for Interventional Radiology. His research focus is the investigation of clinical, genetic and immunological factors associated with outcomes of locoregional therapy for hepatocellular carcinoma and other malignancies.

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Bremer WA, Lokken RP, Gaba RC, Bui JT. Arterial-portal fistula treated with hepatic arterial embolization and portal venous aneurysm stent-graft exclusion complicated by type 2 endoleak. Radiol Case Rep. 2019 Oct; 14(10):1301-1305. PMID: 31467626.
      View in: PubMed
    2. Huang YH, Park BV, Chen YF, Gaba RC, Guzman G, Lokken RP. Locoregional Therapy of Hepatocellular-Cholangiocarcinoma versus Hepatocellular Carcinoma: A Propensity Score-Matched Study. J Vasc Interv Radiol. 2019 Sep; 30(9):1317-1324. PMID: 31375450.
      View in: PubMed
    3. Patel DC, Gaba RC, Liu L, Lokken RP. Tissue plasminogen activator dose and pulmonary artery pressure reduction in catheter directed thrombolysis of submassive pulmonary embolism. PLoS One. 2019; 14(2):e0211701. PMID: 30726288.
      View in: PubMed
    4. Darrow AW, Gaba RC, Lokken RP. Transhepatic Revision of Occluded Transjugular Intrahepatic Portosystemic Shunt Complicated by Endotipsitis. Semin Intervent Radiol. 2018 Dec; 35(5):492-496. PMID: 30728666.
      View in: PubMed
    5. Khabbaz RC, Huang YH, Smith AA, Garcia KD, Lokken RP, Gaba RC. Development and Angiographic Use of the Rabbit VX2 Model for Liver Cancer. J Vis Exp. 2019 Jan 07; (143). PMID: 30663668.
      View in: PubMed
    6. Gaba RC, Lokken RP, Zwanziger J, Girotti JA, Ray CE, Kashima K. Eight Years' Experience With a Radiology-Sponsored Medical Student Research Fellowship Program. J Am Coll Radiol. 2019 Feb; 16(2):224-227. PMID: 30420238.
      View in: PubMed
    7. Gaba RC, Mendoza-Elias N, Regan DP, Garcia KD, Lokken RP, Schwind RM, Eichner M, Thomas FM, Rund LA, Schook LB, Schachtschneider KM. Characterization of an Inducible Alcoholic Liver Fibrosis Model for Hepatocellular Carcinoma Investigation in a Transgenic Porcine Tumorigenic Platform. J Vasc Interv Radiol. 2018 08; 29(8):1194-1202.e1. PMID: 29887183.
      View in: PubMed
    8. Devulapalli KK, Fidelman N, Soulen MC, Miller M, Johnson MS, Addo E, El-Haddad G, Nutting C, Morrison J, Farsad K, Lokken RP, Gaba RC, Fleming J, Brown DB, Kwan SW, Rose SC, Pennycooke KA, Liu DM, White SB, Gandhi R, Lazar AA, Kerlan RK. 90Y Radioembolization for Hepatic Malignancy in Patients with Previous Biliary Intervention: Multicenter Analysis of Hepatobiliary Infections. Radiology. 2018 Sep; 288(3):774-781. PMID: 29737954.
      View in: PubMed
    9. Khabbaz RC, Lokken RP, Chen YF, Lipnik AJ, Bui JT, Ray CE, Gaba RC. Albumin-Bilirubin and Platelet-Albumin-Bilirubin Grades Do Not Predict Survival After Transjugular Intrahepatic Portosystemic Shunt Creation. Cardiovasc Intervent Radiol. 2018 Jul; 41(7):1029-1034. PMID: 29516241.
      View in: PubMed
    10. Morrison JD, Mendoza-Elias N, Lipnik AJ, Lokken RP, Bui JT, Ray CE, Gaba RC. Gastric Varices Bleed at Lower Portosystemic Pressure Gradients than Esophageal Varices. J Vasc Interv Radiol. 2018 May; 29(5):636-641. PMID: 29352698.
      View in: PubMed
    11. Sheybani A, Gaba RC, Lokken RP, Berggruen SM, Mar WA. Liver Masses: What Physicians Need to Know About Ordering and Interpreting Liver Imaging. Curr Gastroenterol Rep. 2017 Oct 18; 19(11):58. PMID: 29044439.
      View in: PubMed
    12. Hansmann J, Evers MJ, Bui JT, Lokken RP, Lipnik AJ, Gaba RC, Ray CE. Albumin-Bilirubin and Platelet-Albumin-Bilirubin Grades Accurately Predict Overall Survival in High-Risk Patients Undergoing Conventional Transarterial Chemoembolization for Hepatocellular Carcinoma. J Vasc Interv Radiol. 2017 Sep; 28(9):1224-1231.e2. PMID: 28688815.
      View in: PubMed
    13. Gaba RC, Lokken RP, Hickey RM, Lipnik AJ, Lewandowski RJ, Salem R, Brown DB, Walker TG, Silberzweig JE, Baerlocher MO, Echenique AM, Midia M, Mitchell JW, Padia SA, Ganguli S, Ward TJ, Weinstein JL, Nikolic B, Dariushnia SR. Quality Improvement Guidelines for Transarterial Chemoembolization and Embolization of Hepatic Malignancy. J Vasc Interv Radiol. 2017 09; 28(9):1210-1223.e3. PMID: 28669744.
      View in: PubMed
    14. Gaba RC, Kobayashi KR, Bui JT, Lokken RP, Lipnik AJ, Ray CE, Oberholzer J. Liver Track Embolization After Islet Cell Transplant: Comparison of Two Techniques. AJR Am J Roentgenol. 2017 May; 208(5):1134-1140. PMID: 28436697.
      View in: PubMed
    15. Lakhoo J, Gunasekaran SS, Lokken RP, Lipnik AJ, Ray CE, Bui JT, Gaba RC. Does advanced chronic kidney disease impact transjugular intrahepatic portosystemic shunt efficacy and safety? Acta Gastroenterol Belg. 2017 Apr-Jun; 80(2):243-248. PMID: 29560689.
      View in: PubMed
    16. Park BV, Gaba RC, Lokken RP. Liver Infarction after Drug-Eluting Embolic Transarterial Chemoembolization for Hepatocellular Carcinoma in the Setting of a Large Portosystemic Shunt. Semin Intervent Radiol. 2016 Dec; 33(4):337-341. PMID: 27904254.
      View in: PubMed
    17. Vyas AR, Bui JT, Ray CE, Lokken RP, Gaba RC. Filter Eversion Technique for Removal of Option ELITE Inferior Vena Cava Filters. J Vasc Interv Radiol. 2016 Nov; 27(11):1718-1720. PMID: 27926394.
      View in: PubMed
    18. Lokken RP, Fidelman N, Kolli KP, Kerlan RK. Safety and Efficacy of Doxorubicin Drug-Eluting Embolic Chemoembolization of Hepatocellular Carcinoma Supplied by Extrahepatic Collateral Arteries. J Vasc Interv Radiol. 2016 Nov; 27(11):1698-1704. PMID: 27397617.
      View in: PubMed
    19. Lee AC, Mullany LC, Ladhani K, Uddin J, Mitra D, Ahmed P, Christian P, Labrique A, DasGupta SK, Lokken RP, Quaiyum M, Baqui AH. Validity of Newborn Clinical Assessment to Determine Gestational Age in Bangladesh. Pediatrics. 2016 07; 138(1). PMID: 27313070.
      View in: PubMed
    20. Lakhoo J, Bui JT, Lokken RP, Ray CE, Gaba RC. Transjugular Intrahepatic Portosystemic Shunt Creation and Variceal Coil or Plug Embolization Ineffectively Attain Gastric Variceal Decompression or Occlusion: Results of a 26-Patient Retrospective Study. J Vasc Interv Radiol. 2016 07; 27(7):1001-11. PMID: 27106732.
      View in: PubMed
    21. Patel D, Ray CE, Lokken RP, Bui JT, Lipnik AJ, Gaba RC. Advanced Stent Graft Treatment of Venous Stenosis Affecting Hemodialysis Vascular Access: Case Illustrations. Semin Intervent Radiol. 2016 Mar; 33(1):39-45. PMID: 27011426.
      View in: PubMed
    22. Lakhoo J, Bui JT, Zivin SP, Lokken RP, Minocha J, Ray CE, Gaba RC. Root Cause Analysis of Rebleeding Events following Transjugular Intrahepatic Portosystemic Shunt Creation for Variceal Hemorrhage. J Vasc Interv Radiol. 2015 Oct; 26(10):1444-53. PMID: 26239896.
      View in: PubMed
    23. Lokken RP, Sadow CA, Silverman SG. Diagnostic yield of CT urography in the evaluation of young adults with hematuria. AJR Am J Roentgenol. 2012 Mar; 198(3):609-15. PMID: 22358000.
      View in: PubMed
    24. Lokken RP, Wellenius GA, Coull BA, Burger MR, Schlaug G, Suh HH, Mittleman MA. Air pollution and risk of stroke: underestimation of effect due to misclassification of time of event onset. Epidemiology. 2009 Jan; 20(1):137-42. PMID: 19244659.
      View in: PubMed
    25. Lokken RP, Gervais DA, Arellano RS, Tuncali K, Morrison PR, Tatli S, Mueller PR, Silverman SG. Inflammatory nodules mimic applicator track seeding after percutaneous ablation of renal tumors. AJR Am J Roentgenol. 2007 Oct; 189(4):845-8. PMID: 17885054.
      View in: PubMed
    26. Jeon CY, Lokken RP, Hu FB, van Dam RM. Physical activity of moderate intensity and risk of type 2 diabetes: a systematic review. Diabetes Care. 2007 Mar; 30(3):744-52. PMID: 17327354.
      View in: PubMed
    27. McConnell TS, Lokken RP, Steitz JA. Assembly of the U1 snRNP involves interactions with the backbone of the terminal stem of U1 snRNA. RNA. 2003 Feb; 9(2):193-201. PMID: 12554862.
      View in: PubMed