Close Modal


Currently filtering by tag: Tubulointerstitial nephritis

Diagnose This (October 19, 2020)

Sarcoidosis, kidney biopsy stain, arkana laboratories, renal pathology
What would be your leading diagnosis in a patient with elevated ACE levels and hilar lymphadenopathy?      ​ ​   ​   ​ ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​   ​ ​   ​ ​   ​ ​...

Twitter Poll (March 18, 2020)

ANSWER: B Membranous glomerulonephritis (MGN) is the most commonly described glomerular disease in IgG4-related disease. MGN was present in about 7% of cases of IgG4-related tubulointerstitial nephritis from two biopsy series studies.   Other specific glomerular diseases have been reported in patients with IgG4-related disease, including IgA nephropathy/Henoch Schönlein purpura nephritis, membranoproliferative glomerulonephritis (MPGN), and mesangioproliferative immune complex glomerulonephritis.   References: Alexander MP, et al. Membranous glomerulonephritis is a manifestation of IgG4-related disease. Kidney Int 2013; 83:455-462. Saeki T, et al. Membranous nephropathy associated with IgG4-related systemic disease and without autoimmune pancreatitis. Clin Nephrol 2009; 71:173-178. Morimoto J, et al....

Twitter Poll (August 7, 2019)

immune checkpoint inhibitors, arkana laboratories, renal pathology
ANSWER: D The most common finding on kidney biopsies in patients with immune checkpoint inhibitors (ICPIs)–induced AKI is acute tubulointerstitial nephritis. Less frequently, granulomatous interstitial nephritis and TMA have also been reported. The two main ICPIs are anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) and anti-programmed cell death protein 1 (PD-1). The onset of kidney injury seen with PD-1 inhibitors is usually late (3-10 months) compared to CTLA-4 antagonists-related renal injury, which happens earlier (2-3 months). PD-1 inhibitors, as opposed to CTLA-4 inhibitors, have been associated with kidney rejection in transplantation. Steroids appear to be effective in treating the immune-related adverse effects...

Not Quite Nodular

ANCA Disease, LECT2 Amyloid, IgG4-Related Disease, AL amyloidosis, ANCA, digging deeper, Dr. Messias, Arkana Laboratories, pathology diseases
This biopsy came from a 70-year-old gentleman with acute renal failure. He had a known history of diabetes, hypertension, and chronic kidney disease.  His baseline serum creatinine is between 1.7 mg/dl and 1.9 mg/dl and was found to be elevated up to 2.9 mg/dl. Proteinuria was quantified as 0.2 g/g on urine protein to creatinine ratio.  Urinalysis showed trace blood and protein.  While processing the clinical information, one has to admit that this clinical presentation is not an unusual one.  A fair number of patients will have a decline in renal function that reflects the reality of an already struggling...


fibrosis, Chronic interstitial nephritis, CIN
Chronic interstitial nephritis (CIN) is diagnosed when interstitial inflammation is present in areas of fibrosis (A) in combination with the presence of tubulitis (B). The most common etiologies include autoimmune disease (e.g. Sjögren’s, TINU, IgG4-related disease) and longstanding drug-induced hypersensitivity reaction. The case shown here is from a patient with chronic interstitial nephritis secondary to treatment with a proton pump inhibitor (PPI). The risk of CKD from PPI therapy is well known. Kidney biopsies from patients with renal function decline resulting from PPI therapy most commonly show a chronic interstitial nephritis pattern of injury. This is one of the most...

Diagnose This! (February 13, 2017)

Please pick the best answer. These images show characteristic findings of which of the following diseases: A) IgG4-Related Disease B) Lupus Nephritis C) Sjögren’s Syndrome-Related Tubulointerstitial Injury D) Anti-Brush Border Antibody Tubulointerstitial Nephritis E) Aristolochic Acid Nephropathy F) Mesoamerican Nephropathy Answer: D. Immune complex tubulointerstitial nephritis due to autoantibodies to the proximal tubule brush border is a recently described entity arising from IgG autoantibodies targeting the proximal tubule brush border. Associated immune complex deposits were also reported within the proximal tubule basement membranes and focal, segmental subepithelial space, reminiscent of early membranous glomerulopathy. Further reading: