Urology / Renal Flashcards
Most common types of stones in nephrolithiasis
- Calcium oxalate
- Calcium phosphate
Other types: uric acid, struvite stones, cystine stones
Characteristics of struvite stones in nephrolithiasis
Staghorn appearance
Caused by urea splitting bacteria (proteus)
Risk factors for nephrolithiasis
Decreased fluid intake
Medications (loop diuretics, chemo drugs)
Gout
Signs/symptoms of nephrolithiasis
Renal colic - acute flank pain that radiates to groin
Pain over CVA
N/V
Unable to find comfortable position
Diagnosis of nephrolithaisis
- Urinalysis - will show hematuria in 80%
- Non-contrast helical Ct scan - test of choice!
- KUB - will only visualize calcium stones
- Intravenous pyelography - gold standard
Treatment of nephrolithiasis <5 mm in diameter
80% chance of spontaneous passage
- IV fluids, analgesics, antiemetics
- Tamsulosin - may facilitate passage
Treatment of nephrolithiasis > 7 mm in diameter
Extracorporeal shock wave lithotripsy
Ureteroscopy +/- stent
Percutaneous nephrolithotomy - used for stones > 10 mm
Prevention of future nephrolithiasis
- Adequate hydration
- Decrease animal protein intake
- Thiazide diuretics are used for recurrent calcium stones
Most common solid tumor in men 15-40 y/o
Testicular Carcinoma
Risk factors for testicular carcinoma
Cryptorchidism - 40 fold risk
Caucasians
Klinefelter’s synddrome
Most common type of testicular carcinoma
Germinal Cell Tumors
Seminomas are more common in ___________ while nonseminomatous carcinomas of the testicles are more common in ___________
Men (30-40)
Boys < 10 y/o
Signs/Symptoms of testicular carcinoma
- Painless testicular nodule, solid mass or enlargement
- Hydrocele present in 10%
- Gynecomastia
Diagnosis of testicular carcinoma
- Scrotal ultrasound
2. Alpha-fetoprotein, BhCG, LDH
Management of low-grade nonseminoma testicular carcinoma
Orchiectomy with retroperitoneal lymph node dissection
Management of low-grade seminoma testicular carcinoma
Orchiectomy, radiation
Management of high-grade seminoma testicular carcinoma
Debulking chemotherapy
Followed by orchiectomy and radiation
Risk factors for cystitis (women)
Sexual intercourse
Spermicidal use
Pregnancy
Postmenopausal
Risk factors for cystitis (men)
Rare - should have workup
> 50 y/o: BPH, prostate cancer
Most common etiology for cystitis
E. coli
Staph, saprophyticus (sexually active women)
Enterococci for indwelling catheters
Dysuria (burning), increased frequency, urgency, hematuria, suprapubic discomfort
Acute cystitis
Fever and tachycardia, back/flank pain + CVAT, N/V
Pyelonephritis
Diagnosis of cystitis/pyelonephritis
- Urinalysis
- Dipstick
- Urine Culture
If urinalysis shows WBC casts
Pyelonephritis
Indications for urine culture with cystitis/pyelonephritis
Complicated UTI Infants/children Elderly Males Urologic abnormalities Refractory to tx Catheterized pts
Conservative treatment for cystitis
Increase fluid intake, void after intercourse
Management of cystitis
- Phenazopyridine (Pyridium) turns urine orange
- Nitrofurantoin, Ciprofloxacin, Bactrim, Fosfomycin
- Pregnant: amoxicillin/augmentin
Management of pyelonephritis
Fluoroquinolones IV or PO aminoglycoside
Immunologic inflammation of the glomeruli causing protein and RBC leakage into the urine
Glomerulonephritis
HTN, hematuria (RBC casts), dependent edema (proteinuria), and azotemia (nitrogen in blood) are hallmarks
Glomerulonephritis
Types of glomerulonephritis
- IgA Nephropathy (Berger’s Dz)
- Post Infectious
- Membranoproliferative/Mesangiocapillary
- Rapidly Progressive Glomerulonephritis (RPGN)
- Goodpasture’s Dz
- Vasculitis
Most common cause of acute glomerulonephritis in adults worldwide
IgA nephropathy (Berger’s dz)
Glomerulonephritis that often affects young males within days (24-48 hours) after URI or GI infection
IgA nephropathy
Diagnosis of IgA nephropathy
IgA mesangial deposits on immunostaining
Management of IgA nephropathy
ACEI +/- corticosteroids
Glomerulonephritis that is most common after GABHS
Post infectious
Glomerulonephritis that classically presents as a 2-14 y/o boy with facial edema up to 3 weeks after Strep with scanty, cola-colored dark urine (hematuria and oliguria)
Post infectious glomerulonephritis
Diagnosis of post infectious glomerulonephritis
Increased antistreptolysin (ASO) titers, low serum complement Biopsy: hypercellularity, increased monocytes/lymphocytes, immune humps
Management of post infectious glomerulonephritis
Supportive, +/- antibiotics
Glomerulonephritis due to SLE, viral hepatitis (HCV, HBV), hypocomplementemia, cryoglobulinemia
Membranoproliferative/Mesangiocapillary glomerulonephritis
Glomerulonephritis associated with poor prognosis (progresses to end stage renal failure within weeks/months)
Rapid progressive glomerulonephritis (RPGN)
Crescent formation on biopsy
Rapidly progressive glomerulonephritis
Due to collapse of crescent shape of Bowman’s capsule