407 results
Causes of Hematuria - Differential Diagnosis Algorithm
Red blood cells on urine microscopy. Must exclude false positives
Causes of Hematuria ... blood cells on urine ... Tubulolnterstitial • Calculi ... • BPH • Calculi ... ) - Isolated Hematuria
UROLITHIASIS 

80% of stones are composed of calcium oxalate or phosphate. Others include uric acid (9%),
staghorn or large calculus ... secondary to elevated urine ... acid levels, low urine ... hydronephrosis # hematuria ... flankpain #PCN #calculus
Causes of Hematuria - Differential Diagnosis
Renal:
 - Glomerular - IgA Nephropathy, Thin basement membrane, Alport syndrome,
Causes of Hematuria ... or other tumor, Calculi ... - Malignancy, Calculi ... Schistomiasis, Malignancy, Calculi ... #Hematuria #Differential
Algorithm and Differential Diagnosis of Macroscopic Hematuria
Important Historical Elements:
- Painless: suggests malignancy
- Painful: suggests calculi/infection
- Urinalysis:
of Macroscopic Hematuria ... Painful: suggests calculi ... #IM #Urology #Hematuria
Hematuria - Differential Diagnosis Framework

Gross Hematuria: Red/Dark urine
 • 1ml blood/liter urine can induce color change
: Red/Dark urine ... 1ml blood/liter urine ... more RBC/HPF spun urine ... examination of urine ... RBC - Brown urine
Types of Renal Calculi

Calcium oxalate
 - Interstitial apatite plaque, Low urine volume, Increased urinary calcium excretion,
Types of Renal Calculi ... apatite plaque, Low urine ... duct plaque, Low urine ... phosphate: alkaline urine ... heart failure #Calculi
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
Hematuria Workup ... Algorithm • Confirm hematuria ... WBCs, or urine ... → Urine culture ... uw_IMresidency #Hematuria
Nephritic vs Nephrotic Syndrome

Step 1: If the patient has hematuria and/or proteinuria, think about nephrotic/nephritic syndromes.
Step
the patient has hematuria ... have glomerular hematuria ... dysmorphic RBCs in urine
Causes Abnormal Urine Color - Differential Diagnosis
Turbid White Urine (Albinuria):
 • Chyluria, Filariasis, Schistosomiasis, Malignancy, Phosphaturia,
Causes Abnormal Urine ... Diagnosis Turbid White Urine ... * Green Urine: ... : • Hematuria, ... : • Hematuria,
Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency
 • Increased osmotic load (Increased
load (Increased urine ... to concentrate urine ... (usually low urine ... Increased intake (low urine ... incontinence, Bladder calculi