Jolanta Kowalewska, MD, PhD Nephropathologist

About

Dr. Jolanta Kowalewska, MD, PhD, joined Arkana Laboratories as a renal pathologist. She brings more than two decades of distinguished experience in medical renal pathology, including prior faculty and clinical appointments at the University of Washington, the Medical University of Bialystok, Cedars‑Sinai Medical Center, Eastern Virginia Medical School, and Ameripath/Quest Diagnostics.

She obtained her MD degree at the Medical University of Warsaw, Poland, and her PhD degree at the Medical University of Bialystok, Poland. She completed both her clinical renal pathology fellowship and a subsequent research fellowship at the University of Washington, building a foundation that has supported an exceptional career in native and transplant kidney pathology.

Dr. Kowalewska is internationally known for her contributions to renal pathology research, with a scholarly record that includes numerous peer‑reviewed publications, book chapters, and invited presentations at major nephrology and pathology conferences. Her work has advanced understanding of complex phenomena such as cryoglobulinemic glomerulonephritis, transplant rejection, viral‑associated renal injury, and immune‑mediated glomerular diseases.

She has also served in key professional roles, including committee leadership within the Renal Pathology Society and the American Society for Clinical Pathology, and has acted as an ad‑hoc reviewer for leading pathology and nephrology journals. Her contributions have earned honors such as the National Kidney Foundation Young Investigator Award and the University of Washington Anatomic Pathology Faculty Member of the Year distinction.

Education & Stats

Our fellowship-trained pathologists have decades of experience interpreting biopsies.

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Joined the Arkana Team 2026
Doctor of Medicine Medical University of Warsaw
Anatomic and Clinical Pathology Residency Winthrop University Hospital
Renal Pathology Fellowship University of Washington
Renal Pathology Research Fellowship University of Washington

Crystals in Podocytes: An Unusual Manifestation of Systemic Disease Crystals in Podocytes: An Unusual Manifestation of…

By Kowalewska J

March 2026

Crystal-storage disorders involving the kidney are characterized by abnormal accumulations of crystalline material…

Crystal-storage disorders involving the kidney are characterized by abnormal accumulations of crystalline material within various cell types. Some of these cases involve hereditary or acquired disorders of metabolism, including cystinosis,…

Read on AJKD

IgA Nephropathy with Crescents in Kidney Transplant Recipients IgA Nephropathy with Crescents in Kidney…

By Kowalewska J

March 2026

Crescentic glomerulonephritis is an uncommon finding in renal allografts. Recurrence or de novo mesangial deposition of…

Crescentic glomerulonephritis is an uncommon finding in renal allografts. Recurrence or de novo mesangial deposition of immunoglobulin A (IgA) in renal allografts most often is clinically benign, but some case reports have shown that IgA nephropathy…

Read on PubMed

Membranous Glomerulopathy with Spherules: An Uncommon Variant with Obscure… Membranous Glomerulopathy with Spherules: An…

By Kowalewska J

March 2026

Occasional case reports of membranous glomerulopathy described unique subepithelial accumulations of an unusual type of…

Occasional case reports of membranous glomerulopathy described unique subepithelial accumulations of an unusual type of immune deposit composed of spherular structures. The identity of such structures as nuclear pores has been suggested, but not…

Read on PubMed

Thymic Stromal Lymphopoietin Transgenic Mice Develop Cryoglobulinemia and… Thymic Stromal Lymphopoietin Transgenic Mice…

By Kowalewska J

March 2026

Essential mixed cryoglobulinemia in humans is strongly associated with chronic hepatitis C virus infection. It remains…

Essential mixed cryoglobulinemia in humans is strongly associated with chronic hepatitis C virus infection. It remains controversial whether liver injury in hepatitis C is primarily attributable to direct viral cytopathic effect or to an…

Read on PubMed

Patterns of Glomerular Injury in Kidneys Infiltrated by Lymphoplasmacytic… Patterns of Glomerular Injury in Kidneys…

By Kowalewska J

March 2026

Glomerular injury may occur as a result of immune dysfunction in patients with remote lymphoplasmacytic neoplasms.…

Glomerular injury may occur as a result of immune dysfunction in patients with remote lymphoplasmacytic neoplasms. Glomerular injury concurrent with direct infiltration of the kidney by lymphoplasmacytic neoplasms has been reported but is not…

Read on PubMed

Expression of Macrophage Markers in Cryoglobulinemic Glomerulonephritis – A… Expression of Macrophage Markers in…

By Kowalewska J

March 2026

Cryoglobulinemic glomerulonephritis (CGGN) is a type of membranoproliferative glomerulonephritis (MPGN) that develops…

Cryoglobulinemic glomerulonephritis (CGGN) is a type of membranoproliferative glomerulonephritis (MPGN) that develops in patients with systemic cryoglobulinemia. To date the exact pathogenesis of CGGN remains unclear. It has been suggested that…

Read on PubMed

Assessment of the Banff Working Group Classification of Definitive BK… Assessment of the Banff Working Group…

By Kowalewska J

March 2026

Polyomavirus associated nephropathy (PyVAN) continues to be a burden in renal transplantation leading to allograft…

Polyomavirus associated nephropathy (PyVAN) continues to be a burden in renal transplantation leading to allograft insufficiency or graft failure. A presumptive diagnosis of PyVAN is made based on the presence of BK polyomavirus in patients' plasma;…

Read on PubMed

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Josephine Ambruzs, MD, MPH

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Kerime Ararat, MD

Nephropathologist

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Vanesa Bijol, MD

Nephropathologist

Christie Boils, MD

Nephropathologist

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Emeritus Nephropathologist

T. David Bourne, MD

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Clarissa Cassol, MD

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Tiffany Caza, MD, PhD

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River Charles, MD

Nephropathologist

L. Nicholas Cossey, MD

Physician Director, Nephropathologist

Rachelle Gietzen, MD

Nephropathologist

Danni Holanda, MD

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Chris Larsen, MD

Chief Executive Officer, Nephropathologist

Alan Lim, MD

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Rebecca May, MD, PhD

Nephropathologist

Paul Miller, MD

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Odia Molen, MD

Nephropathologist

Joel Murphy, MD

Nephropathologist, Visiting Scholars Program Director

Mohammad Obeidat, MD

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Miran Rhee-Anagnost, MD

Nephropathologist

Shree Sharma, MD

Laboratory Director, Nephropathologist

Fred Silva, MD

Emeritus Nephropathologist

Jaime Singh, MD

Nephropathologist

Cherry Starling, MD

Nephropathologist

Patrick D. Walker, MD

Founder, Nephropathologist

T. David Bourne, MD

Neuropathologist, Nephropathologist

Eric Goold, MD

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Joshua Sonnen, MD

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Clarissa Cassol, MD

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