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HEMATURIA DAVID SPELLBERG M.D.,FACS NAPLES UROLOGY ASSOCIATES
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MICROSCOPIC versus GROSS HEMATURIA Microscopic hematuria is seen only under a microsope, whereas Gross hematuria is visible to the naked eye.
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25% of patients with gross hematuria have a life threatening urologic lesion 5 to 20% of patients with microscopic hematuria may have a serious urologic disorder 1% of patients may develop a neoplasm even though an initial workup is negative within 3-4 years Up to 18% of normal individuals may have some degree of microscopic hematuria
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MICROSCOPIC HEMATURIA DEFINITION: 3 or more RBC’S per HPF on a microscopic evaluation from a minimum of 2 PROPERLY collected urine specimens. (AUA BEST PRACTICE POLICY PANEL 2001).
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DETECTION OF HEMATURIA Dipstick testing 91% sensitivity, 65% specificity for the detection of Hgb False positives caused by: –Myoglobinuria –Menstrual bleeding –Dehydration (increased SG level) –Outdated or dried dipsticks –Substances or medications
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Substances and medications Artificial food coloring Beets Berries Lead or mercury poisoning Meds: adriamycin, chloroquine, hydroxychloroquine, metronidazole, nitrofurantoin, phenazapyridine, rifampin
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Most common causes S stones I infection T tumor T trauma
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Etiology of Hematuria V vascular I infectious T Tumor/ trauma A anatomic anomaly M metabolic I inherited N nonspecific
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Vascular Aneursym Renal vein thrombosis/ Infarct Malignant hypertension nephritis
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Infectious Bacterial (remember levaquin) Viral Fungal Parasitic TB
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Tumor/ trauma Kidney, ureteral, bladder, prostate, urethral malignancy Instrumentation Radiation Exercise Foreign body Trauma
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Anatomic anomaly BPH benign prostatic hyperplasia Pelvic muscle relaxation Renal duplication UPJ obstruction Polycystic kidney Medullary sponge kidney Strictures Ureterocele or urethrocele
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Metabolic Kidney stones Bladder stones Drug induced
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Inherited IgA nephropathy (Berger’s disease) Sickle cell anemia Benign familial hematuria
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Nonspecific Physiologic –Exercise –Fever False Positive -Endometriosis -Vaginal bleeding -factitious
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History Gross vs. microscopic Initial, terminal, or throughout stream Painful, irritation, or flank pain Recent strep or skin infection Medications Smoking, occupational exposure Trauma/ instrumentation, radiation/ chemo
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Physical exam Vital signs Rashes, petechiae, mottling Flank or abdominal mass Genitalia exam
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Lab studies UA UA C&S BMP If indicated: CBC, PT/PTT/ INR IVP, CT urogram, Renal ultrasound, retrograde pyelograms
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Urology referral If not previously evaluated for hematuria, ALL patients need a cystoscopic examination of the bladder mucosa. NO radiologic study or urinary test (cytology, NMP-22, or BTA-stat) fully evaluates the bladder.
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Nephrology referral Significant proteinuria without hematuria RBC casts Elevated creatinine above 2.5
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Follow up Somewhat controversial Repeat UA, cytology every 6 months for 2 years followed by yearly exams. Re-evaluation for a new episode of gross hematuria if over 6 months and no previous cause was found. 18% of patients may always have hematuria without a definitive cause
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