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twitter poll answer for april 9
Twitter Poll

Twitter Poll (April 9, 2020)

ANSWER: C In one of the largest cases series by Ambruz et al., IgA nephropathy (IgAN) was the most common…

Vanessa Moreno, MD
By Vanessa Moreno, MD
IgA Dominant Infection-Associated Glomerulonephritis, renal pathology
Teaching Points

IgA Dominant Infection-Associated Glomerulonephritis

A 65-year-old male presents to the ER with a new onset rash and blood in his urine. The ER doc…

paraffin immunofluorescence
Teaching Points

Potential Diagnostic Pitfall of PIF Method

The paraffin immunofluorescence technique is simple to perform for renal pathology laboratories familiar with routine IF. It is important as…


IgA Nephropathy
Diagnose This!

Diagnose This! (January 8, 2018)

The immunofluorescence image shown is of IgA. What is the most likely diagnosis and clinical history?   …

L. Nich Cossey, MD
By L. Nich Cossey, MD
Crescentic Glomerulonephritis with IgA Deposits
Teaching Points

Crescentic Glomerulonephritis with IgA Deposits

This biopsy was taken from a 58-year-old male with no significant past medical history, who presents with gross hematuria, serum…

MEST-C, IgA with Crescents
Teaching Points

IgA with Crescents, MEST-C

This biopsy is from a young adult patient with IgA nephropathy (the immunofluorescence image in Fig. 2 shows 2+ mesangial…


IgA nephropathy
Diagnose This!

Diagnose This! (October 23, 2017)

This IF image is from a 22 y/o Asian male with hematuria. What immunoreactant does it represent and what is…

L. Nich Cossey, MD
By L. Nich Cossey, MD
Acute Tubular Injury with Legionella
Teaching Points

IgAN and Acute Tubular Injury with Legionella

Acute kidney injury in the setting of Legionella pneumonia. This biopsy is a middle-aged person with Legionella pneumonia who developed…

Patrick D. Walker, MD renal pathologist at arkana laboratories
By Patrick D. Walker, MD
IgA Nephropathy
Teaching Points

IgA Nephropathy

Figure 1 shows a renal biopsy from a 29-year-old man with no significant past medical history, who was found to…