cram.pathoma Flashcards
Dx
Bilateral cysts in the kidney, but NOT inherited
Dysplastic kidneys
Dx
Potter sequence, HTN, renal failure in child
Autosomal Recessive Polycystic Kidney Disease
Associated with renal cysts
Hepatic cysts
Both ADPKD and ARPKD
Dx
HTN, hematuria, renal failure in young adult, berry aneurysm, hepatic cysts, mitral valve prolapse
Autosomal Dominant Polycystic Kidney Disease
Cysts in Kidney, Liver, and Brain
Renal cysts: Medullary Cystic Kidney Disease vs Polycystic Kidney Disease
1) Kidney size
2) Location of cysts
MDCK = Small, Cysts in Medulla
PKD = Large, Cysts in Cortex and Medulla
Why does BUN/Cr increase in Prerenal azotemia?
BUN is resorbed in tubule. Cr is not. Nl BYN:Cr is 15:1. Prerenal will cause increased Aldosterone –> Inc Na resorption –> Inc water resorption –> Inc BUN resorption.
Signs of Tubular damage
5
1) BUN:Cr 2%
3) Urine Osm <500
4) Hyperkalemia
5) Metabolic Acidosis
Why does ATN cause azotemia/renal failure?
Dead tubule cells slough off and block filtrate causing backpressure that prevents Filtering –> Renail failure/azotemia
Dx
Brown granular cast
ATN
Dx
Eosinophils in urine
Drug induced ATN
Characteristics of Nephrotic Sx
4
1) Hypoalbuminemia
2) Hypogammaglobulinemia
3) Hypercoagulable (ATIII decreased)
4) Hyperlipidemia
Kidney disease in Hodgkin’s Lymphoma
Minimal Change Disease (bc of cytokines!)
Dx
Nl glomeruli, effacement on EM, negative IF
Minimal Change Disease
Tx
Minimal Change Disease
Steroids
only Nephrotic sx with excellent response to steroids
Dx
HIV pt develops Nephrotic sx
(or heroin, or sickle cell, basically someone from The Wire)
Focal Segmental Glomerular Sclerosis
Dx
Lupus pt gets Nephrotic Sx
Membranous Nephropathy
Dx
Thick basement membrane, Granular on IF, Spike and dome on EM
Membranous Nephropathy
spikes/domes from immune deposits
Dx
Thick capillary membrane in Glomerulus, Tram Track appearance, IF deposits
Membranoproliferative Glomerulonephritis
Which Nephrotic sx is called -nephritis
Membranoproliferative Glomerulonephrtitis
Can cause Nephritic or Nephrotic or Both
Types of Membranoproliferative Glumerulonephritis
C3 Nephritic Factor, Intramembranous
HBV/HCV, Subdendothelial
1) Type I
2) Type II
(Membranous deposits are above BM)
Mech Nephrotic sx in Diabetes
High Sugar glycosylates vascular membrane –> Hyaline arteriosclerosis of Efferent > Afferent –> High filtration –> Microalbuminuria
Tx
Nephrotic sx due to Diabetes
ACE-Is
Dx
Nephrotic sx, apple-green birefrigence
Systemic Amyloidosis
Characteristics of Glomerulonephritis
4
Glomerular Inflmmation with
1) Oliguria
2) Salt retention and edema
3) RBC casts
4) Limited proteinuria
What carries Nephritic potential on Strep bugs
M Factor
What is Crescent in RPGN?
Fibrin and Macrophages
Dx
Linear immunoflouorescence pattern
Goodpasture’s
Dx: Pauci-Immune IF
cANCA:
pANCA:
cANCA: Wegener’s Granulomatosis
pANCA: Churg-Strauss and Microscopic Polyangiitis
Churg-Strauss has Eos and Asthma