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Focal Lupus Nephritis, mesangial hypercellularity
Teaching Points

Class III Focal Lupus Nephritis

This 9-year-old female was recently evaluated for lymphoid malignancy due to weight loss and intermittent fevers. Following a negative workup…

Patrick D. Walker, MD renal pathologist at arkana laboratories
By Patrick D. Walker, MD
Podcast

The Story of Dense Deposit Disease

In our 6th episode of TBT, Dr. Silva explains the origins of Dense Deposit Disease.

Fred Silva, MD renal pathologist at arkana laboratories
By Dr. Fred Silva
Eosinophil-Rich Inflammation in Diabetic Glomerulopathy
Teaching Points

Eosinophil-Rich Inflammation in Diabetic Glomerulopathy

These photomicrographs are from a patient with diabetic nephropathy as evidenced by the Kimmelstiel-Wilson nodules in the glomerulus present on…


Intimal Arteritis
Teaching Points

Intimal Arteritis

The image in Figure 1 shows mild intimal arteritis in an allograft biopsy from a patient who had undergone a…

arkana laboratories, arkana journal club, kidney pathology, nephrology
Arkana Journal Club

Arkana Journal Club (June 7, 2017)

Head over to Twitter to catch Dr. Cossey (@TheGoodMD) live tweet the Arkana Journal Club right now! Here are the…

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By Chassity Jordan
FSGS Tip Lesion
Teaching Points

FSGS Tip Lesion

This biopsy is from a 35-year-old male with no significant medical history, who presents with sudden onset nephrotic syndrome. At…


Monoclonal Gammopathy of Renal Significance
Diagnose This!

Diagnose This! (June 5, 2017)

Whats your diagnosis?   …

By L. Nich Cossey, MD
Dr. Cossey, Arkana Laboratories, Nephropathologist
Arkana Physician Spotlight

Arkana Physician Spotlight: Dr. Cossey

Dr. Cossey joined us in 2013 after completing his fellowship training in renal pathology at Arkana Laboratories. He received his…

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By Chassity Jordan
Chronic Active Tubulointerstitial Nephritis
Teaching Points

Chronic Active Tubulointerstitial Nephritis

39 y/o male presents with acute kidney injury, creatinine 3.5 mg/dl. Bland urinalysis, serologic studies negative. Immunofluorescence study of the…

Patrick D. Walker, MD renal pathologist at arkana laboratories
By Patrick D. Walker, MD

Fabry EM
Teaching Points

Fabry EM

Electron photomicrograph of a glomerular podocyte showing the characteristic electron dense laminated inclusions of Fabry disease. Fabry is a lysosomal…

Congo Red Stain
Teaching Points

Congo Red Stain

Importance of the congo red stain The ability to detect amyloid deposits in human tissue is the critical first step…

Chef Boyardaniel at Arkana Laboratories
Arkana Visualized

Chef Boyardaniel

Chef Boyardaniel is perfecting his cookie recipe* because at this year’s River Cities Dragon Boat Festival we are having a…

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By Chassity Jordan

BK nephritis
Pushing Glass

Pushing Glass (May 30, 2017)

A 62-year-old Asian male with a past medical history significant for ESRD secondary to hypertension S/P renal transplant (9 months…

Diffuse Mesangial Hypercellularity
Teaching Points

Diffuse Mesangial Hypercellularity

This biopsy is from a previously healthy 3 year old female, who presented with sudden onset nephrotic syndrome, hypertension and…

Teaching Points

Light Chain Cast Nephropathy

Immunofluorescence staining with kappa light chain and lambda light chain antibodies shows negative kappa in casts that are lambda positive…

Patrick D. Walker, MD renal pathologist at arkana laboratories
By Patrick D. Walker, MD