Pathology Flashcards
Elevation of CREATINE differentials?
Renal failure
Chronic nephritis
Renal obstruction
Diabetes
Elevation of BUN differentials?
Renal failure Parenchymal disease Renal obstruction Dehydration Diabetes
Elevated with infection or inflammation?
Total WBC count
Decreased with hemorrhage?
Hematocrit
Indications for renal imaging…
Abn lab values - BUN &/or CREAT Abn urinalysis Pain Difficulty with urination Repeat UTI
Most common renal mass is a __________.
Simple renal cyst
Simple renal cysts occurring in __________% of adults over __________ yrs old.
50%
50 yrs old
Simple renal cysts are not significant unless they __________ or __________ or __________.
Distort the calyces
Produce pain
Hydronephrosis
Simple renal cysts are __________.
Asymptomatic
Simple renal cysts sonographically?
Well defined Well circumscribed Anechoic Smooth walls Through transmission - enchacement No color within Spherical
Types of renal cysts?
Peripelvic
Parapelvic
Exophytic
Milk of calcium
Describe peripelvic cysts…
Develop from lymphatic system
Small, multiple, bilateral
Originate in the renal sinus/pelvis
Does not communicate with collecting system
Describe parapelvic cysts…
Renal hilum
Originates from parenchyma & protrudes into renal sinus
Does not communicate with renal collecting system
Close proximity to renal pelvis & major calyces
Not related to dilatation of calyces or ureters
Parapelvic cysts may mimic __________.
Hydronephrosis
Parapelvic cysts sonographically?
Well defined mass - solitary & large
May have irregular border
**May obstruct the kidney
Which cyst can obstruct the kidney? Peripelvic or parapelvic?
Parapelvic obstructs NOT peripelvic
Describe a cortical cyst…
Small cortical cysts may be difficult to differentiate from pyramids
Describe an exophytic cyst…
Projected out away from the kidney
Describe a milk of calcium cyst…
Fluid level within a cyst
Very rare
What diseases & syndromes present with cystic areas of the kidney?
Von Hipple-Lindau Tuberous Sclerosis Acquired cystic disease of dialysis IPKD APKD Multicystic Dysplastic Kidney Medullary Cystic Disease
Cysts with Von Hipple-Lindau…
Autosomal-dominant genetic
Tumors of the central nervous system & orbits
ABD cysts
Cysts with Tuberous Sclerosis…
Autosomal genetic - multiple system Multiple renal cysts Multiple angiomyolipomas Mental retardation Seizures/epilepsy Cutaneous/skin lesions
Acquired cystic disease of dialysis…
Increased incidence of cysts, adenoma, renal carcinoma
Bleeding can cause flank pain
What is IPKD?
Infantile Polycystic Kidney Disease
Also called Autosomal Resessive Polycyctic Kidney Disease or Potter Type I
What is APKD?
Adult Polycystic Kidney Disease
Also called Autosomal Dominant Polycystic Kidney Disease or Potter Type II
Congenital Cystic Disease…
Autosomal Resessive Polycystic Kidney Disease Rare Chromosome 6 Dilation of renal collecting tubules Renal failure
Perinatal ARPKD?
Leads to renal failure and demise
Oligohydramnios
Enlarged echogenic kidneys
Neonatal/Infant ARPKD?
More common in females
Bilateral enlarged echogenic kidneys with cysts (3B’s-BIG, BRIGHT, BILATERAL)
Infants often die with complications of renal failure & hepatic disease
Juvenile ARPKD?
Lack of corticomedullary differentiation
Small cysts in the medulla
Hepatic fibrosis & splenomegaly
Describe ADPKD…
Common Men & women Most common is chromosome 16 Bilateral Multiple cysts (in other organs also) Dialysis Associated with liver cysts
Clinical findings of ADPKD?
Flank pain Hypertension Mass Hematuria Headache UTI Renal insufficiency
Fetus ADPKD sonographically?
Moderately enlarged hyperechoic kidneys
Adult ADPKD sonographically?
Bilateral renal enlargement Loss of shape Multiple cysts Normal renal parenchyma can be displaced with cysts Can become infected or hemorrhagic May lead to renal failure
Describe Multicystic Dysplastic Kidney…
Non-hereditary
Renal dysplasia
Unilateral
__________A the most common palpable mass & cystic disease in neonates.
Multicystic Dysplastic Kidney
Multicystic Dysplastic kidney may lead to __________, __________, __________, and __________.
Infection
Hypertension
Hematuria
Flank pain
Multicystic Dysplastic Kidney sonographically…
Enlarged kidneys Multiple cysts Ureteral atresia Ureteropelvic obstruction If bilateral, not compatible with life Non functioning kidney Compensatory hypertrophy of the other kidney
Describe nephronophthisis…
Autosomal resessive/dominant forms
Salt wasting nephropathy
Bilateral
Describe medullary cystic disease…
Tubular atrophy Glomerular sclerosis Multiple small cysts Loss of cortico-medullary junction Renal failure
Types of renal calcifications…
Urolithiasis
Neohrolithiasis
Nephrocalcinosis
Describe urolithiasis…
Combo of chemicals in urine Kidney stones anywhere in the urinary tract Common Causes obstruction Severe back pain
Describe nephrolithiasis…
Kidney stones within the kidney
Men
Renal calculi appear as reflective echogenic foci
Staghorn calculus-large stones in the central portion
Urolithiasis-Nephrolithiasis sonographically?
Renal stones are echogenic with shadowing
Color Doppler - TWINKLING artifact
Treatment of urolithiasis-nephrolithiasis…
*renal acidosis
Extracorporeal shockwave lithotripsy
Percutanceous nephrolithotomy
Ureteroscopic stone removal
__________ Is an accumulation of calcium within renal parenchyma (medullary & cortical).
Nephrocalcinosis
Nephrocalcinosis sonographically?
Diffuse foci calcium
Bilateral
Very echogenic pyramids
Loss of cortico-medullary junction
__________ Is calculi within the cortex.
Cortical nephrocalcinosis
Describe medullary sponge kidney…
Rare birth defect
Benign
Calcium stones
Dysplastic dilatation of tubules
Types of malignant renal tumors…
Renal cell carcinoma Transitional cell carcinoma Squamous cell carcinoma Lymphoma Metastases Wilm's tumor
__________ Is the most common renal tumor.
Renal cell carcinoma
Renal cell carcinoma is __________ as common in females as in males.
Twice
*6th to 7th decade of life
Clinical findings of renal cell carcinoma…
Hematuria
Flank pain
Palpable mass
Unexplained weight loss
Renal cell carcinoma deals with __________ system.
Staging-Robson
Progression of Staging-Robson system…
- Confined to kidney
- Spread to perinephric fat but within Gerota fascia
- Perinephric involvement with spread to renal vein &/or IVC
- Perinephric involvement with regional lymph node enlargement
- Perinephric involvement with venous & lymph
- Invasion of adjacent structures
What is renal cell carcinoma also called?
Hypernephroma
Renal cell carcinoma sonographically…
Echogenic mass
Complex
Calcification
Highly vascular - “basket sign”
__________ Is most common tumor of the collecting system.
Transitional cell carcinoma
Describe transitional cell carcinoma…
Often multiple Higher in males Hypoechoic mass in the renal pelvis Invasive Pain secondary to obstruction Hematuria