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Archive: Arkana Physician Spotlight

Arkana Physician Spotlight: Dr. Walker

Doctors at Arkana Laboratories, Dr. Walker
Patrick D. Walker is the founder of Arkana Laboratories and has more than 40 years of experience in the interpretation of native kidney and renal allograft biopsies. Before founding Arkana Laboratories, Dr. Walker was Chief of the Department of Pathology and Laboratory Medicine at the John L. McClellan Veterans Administration Hospital, Vice-Chairman of the Department of Pathology and Laboratory Medicine at the University of Arkansas for Medical Sciences (1991-2002), and on faculty in the Department of Pathology at Tulane University (1978-1991).   Dr. Walker has a passion for advancing the understanding of disease and has authored more than 100 peer-reviewed...

Arkana Physician Spotlight: Dr. Bell

Dr. Bell, Arkana Laboratories physician
Dr. Bell graduated in 1981 from the University of Nebraska with a BS in Life Sciences (with Highest Distinction), and in 1985 from the University of Iowa Carver College of Medicine. She completed a pathology residency at the University of Arkansas for Medical Sciences and was chief resident during her tenure. After residency, Dr. Bell joined UAMS as an Assistant Professor in anatomic and clinical pathology and later had appointments at Baptist Medical Center in Little Rock as well as Arkansas Children’s Hospital before coming to Arkana (then Nephropath) in 2004. Dr. Bell was the first renal pathologist fellow to...

Arkana Physician Spotlight: Dr. Messias

Dr. Messias, Arkana Laboratories, renal pathology fellowship program
Dr. Nidia Messias joined Arkana Labs in 2010. Previously, Dr. Messias was Assistant Professor in Surgical and Renal Pathology at the Medical College of Georgia in Augusta, GA where she also served as medical director of the electron microscopy laboratory. Dr. Messias completed her residency in Anatomic and Clinical Pathology at the University of Maryland Medical Center and was chief resident during her tenure. She received fellowship training in renal pathology at Johns Hopkins University. At Arkana, Dr. Messias oversees the fellowship program in renal pathology, directs the visiting scholars program, is on the Consensus in Diagnostics Committee, and authors...

Arkana Physician Spotlight: Dr. Ambruzs

Dr. Josephine Ambruzs joined our staff in 2013 following the completion of her fellowship training in renal pathology at Arkana Laboratories. Dr. Ambruzs received her MD from Rutgers Robert Wood Johnson Medical School in Piscataway, NJ, a Master of Public Health in Epidemiology from the University of Alabama at Birmingham. She completed a pathology residency at the University of Texas Southwestern Medical Center, Dallas, TX, where she finished her tenure as chief resident. At Arkana, Dr. Ambruzs helps troubleshoot with our specimen triage team, works on our standardization in diagnostics committee, and provides much support as an internal consultant on...

Arkana Physician Spotlight: Dr. Silva

Fred Silva, Doctors at Arkana Laboratories
Dr. Fred Silva joined Arkana Laboratories in 2011 following 12 years of service as the Executive Vice President and Secretary-Treasurer of the United States and Canadian Academy of Pathology. During that time, he also served as Adjunct Professor of Pathology at Emory University in Atlanta, as well as Visiting Clinical Professor at the Medical College of Georgia in Augusta. Dr. Silva received his BS and MD from the University of Oklahoma. He trained at Columbia University College of Physicians and Surgeons in New York City where he also served as Assistant Professor in Surgical and Renal Pathology. In 1980, he...

Arkana Physician Spotlight: Dr. Bourne

Dr. Bourne, Doctors of Arkana Laboratories, renal pathology
Dr. David Bourne joined Arkana in 2016. He received his medical degree from the University of Texas Medical School in Houston followed by pathology residency and fellowship training at the University of Virginia.  Dr. Bourne brings a unique skill set and perspective to Arkana as he has training and proficiency in many of the esoteric fields of pathology such as neuropathology, renal pathology, transplant pathology, and ophthalmic pathology. He also taught English in Poland prior to his medical training and is often our go-to resource for resolving grammar and punctuation disputes. Beyond his diagnostic skill and multiple specializations, Dr. David...

Arkana Physician Spotlight: Dr. Hennigar

Dr. Hennigar, Arkana Laboratories Doctors, renal pathologists
Dr. Randolph Hennigar joined Arkana Laboratories following many years at Emory University Hospital where he served as an associate professor, director of the laboratory of nephropathology and electron microscopy, and co-director of autopsy services. Dr. Hennigar received his MD and PhD from the Medical University of South Carolina, followed by residency training in anatomic pathology and fellowship in molecular oncology and nephropathology at Johns Hopkins University School of Medicine. At Arkana, Dr. Hennigar leads our cross-functional quality improvement team, and has been instrumental in implementing quality improvement initiatives in all departments utilizing principals of Lean technology and Six Sigma. Additionally,...

Arkana Physician Spotlight: Dr. Wilson

Dr. Jon Wilson, Arkana Laboratories Physician, neuropathology, molecular pathology
Dr. Jon Wilson joined Arkana Laboratories in 2013 following several years of work in academic centers. He completed a fellowship in molecular pathology at the University of Minnesota in Minneapolis, MI, as well as a fellowship in neuropathology at Stanford University in Palo Alto, CA. Additionally, Dr. Wilson is board certified in both neuropathology and molecular pathology. His knowledge and direction have been instrumental in the development of our muscle and nerve pathology program, as well as our molecular diagnostics laboratory, where he helps create new molecular diagnostic assays utilizing next-generation sequencing. Our lab has also been aided in maintaining...

Arkana Physician Spotlight: Dr. Best

Dr. Best, Arkana Laboratories Physician, renal pathologist
Dr. Best joined Arkana in 2016 after graduating from medical school at the Universidad Autónoma de Baja California (Mexico), completing anatomic pathology residency at Baylor College of Medicine, and completing renal pathology fellowship at Arkana Laboratories. Dr. Best is also a board-certified pediatric pathologist and completed a fellowship in pediatric pathology at Texas Children’s Hospital, Baylor College of Medicine prior to coming to Arkana Laboratories. Dr. Best is an excellent speaker and has recently been an invited lecturer at The 5th International Congress of Pediatric Urology – Nephrology, Dialysis and Transplantation in Da Nang, Vietnam, sponsored by the International Pediatric...

Arkana Physician Spotlight: Dr. Sharma

Dr. Shree Sharma, Arkana Laboratories Physician, Renal Pathologist
Dr. Shree Sharma joined Arkana Laboratories in 2014 following two years at the University of Arkansas for Medical Sciences in Little Rock, AR, where he served as Assistant Professor in the Department of Pathology. He received his MD from All India Institute of Medical Sciences, New Delhi, India and went on to complete a residency in pathology at the University of Arkansas for Medical Sciences, and a fellowship in renal pathology at Columbia University Medical Center. At Arkana Laboratories, Dr. Sharma oversees our nephropathology lab and is involved in contract research operations and our zebrafish core program. He is also...