Pathology Flashcards
Immunofluorescence findings in membranoproliferative glomerulonephritis
- Granular pattern of C3
- Deposition of IgG, C1q, C4
- Tram-track appearance on PAS stain
Mutated gene in Alport syndrome
*COL4A5, leads to a defective type 4 collagen production
Signs and symptoms of Alport syndrome
- Hereditary nephritis in childhood (X-linked)
- Sensorineural hearing loss
- Ocular abnormalities of the lens and cornea
Light microscopy findings in membranous glomerulonephritis
- Glomerular capillary wall thickening
* Basement membrane projections (silver staining)
Most common cause of nephrotic syndrome in children
Minimal change disease
Affected chromosome in Wilms tumor
Chromosome 11
Light microscopy findings in Wilms tumor
- Metanephric blastema
- Epithelial elements (immature glomeruli and tubules)
- Stromal elements
Type of diuretics that can help decrease levels of calcium in hypercalcemia
Loop diuretics
Loop diuretic that can be used in patients with sulfa allergy
Ethacrynic acid
Urine calcium levels seen in Bartter and Gitelman synrome
- Bartter: high
* Gitelman: low
Enzyme deficiency seen in syndrome of apparent mineralocorticoid excess (SAME)
Deficiency of 11beta-hyroxysteroid dehydrogenase
*Normally converts cortisol (active at mineralocorticoid receptors) to cortisone (inactive at mineralocorticoid receptors)
Dietary substance that can cause blockage of 11beta-hydroxysteroid dehydrogenase activity, leading to syndrome of apparent mineralocorticoid excess (SAME)
Glycyrrhetinic acid (present in licorice)
Syndrome of apparent mineralocorticoid excess (SAME) treatment
Corticosteroids
Pathophysiology of renal tubular acidosis (RTA) type 1
Defect in ability of alpha intercalated cells to secrete H leads to no new generation of HCO3 and metabolic acidosis
Urine pH seen in renal tubular acidosis (RTA) type 1
Greater than 5.5
*Leads to increase risk for calcium phosphate kidney stones
Pathophysiology of renal tubular acidosis (RTA) type 2
Defect in proximal convoluted tubule HCO3 reabsorption leads to increased excretion of HCOR in urine and subsequent metabolic acidosis
Urine pH seen in renal tubular acidosis (RTA) type 2
Lower than 5.5
Acid-base disturbance seen at high altitude
Respiratory alkalosis, then kidneys decrease H secretion and HCO3 reabsorption in order to create a compensatory metabolic acidosis
Biopsy findings in acute poststreptococcal glomerulonephritis (ASPGN)
- Infiltrate of neutrophils in the glomeruli
- All glomeruli are affected
- Granular deposits of IgG and C3 throughout the glomerulus
- Subepithelial immune complexes (humps)
Electrolyte imbalances seen in chronic kidney failure
- Hyperkalemia
- Hyperphosphatemia
- Hypocalcemia
- Hypomagnesemia
Pathologies associated with focal segmental glomerulosclerosis
- Obesity
- HIV
- Heroin use
- Sickle cell
- Interferon treatment
- CKD
Waxy casts are associated with which pathologies
End-stage renal disease/chronic renal failure
Glomerular diseases that can lead to nephritic syndrome
“MARIA”
- Membranoproliferative glomerulonephritis
- Alport syndrome
- Rapidly progressive glomerulonephritis
- IgA nephropathy (Berger disease)
- Acute poststreptococcal glomerulonephritis (APSGN)