AUBF 2 - Urinary Cast Flashcards
Most frequently seen cast in urine
Hyaline cast
Stain used for hyaline cast and what resulting color
Sternhaimer; Pink
Non-pathologic cause of Hyaline cast
Strenous exercise
Heat exposure
Emotional Stress
Dehydration
Pathologic cause of Hyaline cast
AGN
Pyelonenephritis
Congenital Heart failure
Chronic renal disease
Sizes of Hyaline cast
Parallel sides
Rounded end
Cylindroid
Greater stasis of urine is found
RBC cast
Significance of RBC Cast
Bleeding within nephrons
Glomerular damage is associated with
Dysmorphic RBC
Proteinuria
Under LPO, RBC cast appears
Orange-red due to Hgb
Usually seen with neutrophil attached to a cast
WBC cast
Non-bacterial inflammation is associated with
Acute interstitial nephritis
Bacterial inflammation is asssociated with
Pyelonenephritis
Difference between Pyelonenephritis and Cystitis
Pyelonenephritis (w/ WBC cast)
Cystitis (none)
Used to differentiate bacterial cast from granular cast
Gram stain
Bacterial cast must be with WBC
Pure or mixed
Pathologic form of Epithelial cells
With RTE cells
Clinical signficance of Epithelial cast
Advanced tubular obstruction
Composed of multiple cells
Mixed celullar cast
Mixed celullar cast: GN composed
WBC and RBC cast
Mixed cellular cast: Pyelonephritis consist
WBC AND RTE
Formed due to celullar degranulation
Granular cast
Degranulation of granular cast appears like
Waxy cast
Waxy cast stain
Supravital stain: homogenous dark pink
Clinical significance of Waxy cast
Extreme urine stasis
Other term for Broad cast
Renal failure cast
Clinical significance of Broad cast
Widening of tubular walls
Fragmented and jagged ends cast
Waxy cast
Clinical significance of Fatty cast
Lipiduria: Fatty cast, Oval fat bodies, Free fat droplets
Fatty cast is associated with
Nephrotic syndrome
DM
Crush injuries
Toxic tubular necrosis
