5.5 Renal Path 4 Flashcards
(173 cards)
RECALL
Urothelial carcinoma of the renal pelvis.
The renal pelves, ureters, bladder and urethra are lined by special transitional epithelium called urothelium.
These can be considered what type of GU cancers?
field effect
What are paired smooth muscle ducts which are channels for urine flow from the kidneys to the urinary bladder, usually 10-12in long and 3-4mm in diameter?
Ureters
There are three points of slight narrowing, at the ureteropelvic junction, where they cross the iliac vessels and as they?
enter the bladder (all places where renal stones might get stuck)
Congenital anomalies of the ureters mostly have little clinical significance and are found incidentally on autopsy. What anomaly come off double renal pelvis or bifed pelvis and are mainly unliateral with no clinical sig?
Double and bifid ureters
What anomaly is the MCC of hydronephrosis in infants and kids, early cases are bilateral in males, in adults is more common in women and unilateral?
Ureteropelvic junction (UPJ) obstruction
What anomaly is a saccular outpouching of the ureteral wall, most are asymptomatic but stasis can lead to infection, can be associated with dilation, elongation and tortuosity of the ureters?
Diverticulae
What is associated with inflammation and is typically not associated with infection and is of little clinical consequence?
Ureteritis
ureteritis collicularis is when there are elevations in the mucosa producing a fine granular mucosal surface. What is mucosa sprinkled with fine cysts with flattened urothelium?
Urethrisis cystica
Primary tumors of the ureters are rare as well as primary malignant tumors, what is the most common ?
urothelial carcinomas
What is a tumor like lesion that presents as a small mass projecting into the lumen often in children ?
fibroepithelial polyp
What fibrosis is uncommon cause of ureteral narrowing or obstruction, chracterized by fibrotic proliferative inflammatory process encasing the retroperitoneal structures (SAD PUCKERS) and causing hydronephrosis?
Sclerosing retroperitoneal fibrosis
Sclerosing retroperitoneal fibrosis is uncommon but more common in middle to late age men and can be *idiopathic or associated with IgG4 diseases, involves other exocrine organs including salivary glands and?
pancreas
On LM, Sclerosing retroperitoneal fibrosis has fibrous tissue containing prominent infiltrate of lymphocytes often with germinal centers, plasma cells (IgG4), and eosinophils, treat with?
corticosteroids and surgery
Intrinsic causes of ureteral obstruction include calculi, strictures, tumors, blood clots, and extrinsic includ tumors, endometriosis, periureteral inflammation and?
pregnancy (due to pressure from enlarging fundus)
The urinary bladder wall from top to deep has urothelium, lamina propria, muscularis propria and adventitia, in the urothelium one can see characteristic ?
umbrella cells (expand !)
What is the MC and serious congenital anomaly of the urinary bladder?
Vesicoureteral reflux VUR (causes pyelonephritis)
What is a pouchlike evagination of the bladder wall which may arise as a congenital anomaly but more likely are acquired due to persistent urethral obstruction?
Diverticulae
The congential form of bladder diverticulae is due to focal failure of devel. of normal musculature during fetal devel. Acquired is most often seen with?
prostatic enlargement (producing obstruction to urine outlfow and thickening of the bladder wall)
Diverticulae of the bladder allow for urine stasis causing infection, may predispose to VUR if they impinge the ureter, and carcinomas may ?
metastasize quicker due to the thin wall
What is a developmental failure in the anterior abdominal wall and bladder, with the bladder projecting directly through a large defect to the body surface or lies as an unopened sac (M=F, W»B)?
Exstrophy
Exstrophy causes exposed mucosa to undergo colonic granular metaplasia and is subject to infection, patients also have an increased risk of what?
adenocarcinoma
VUR = urine from bladder exhibits retrograde flow into the ureter and kidney due to valve malfunction, usually caused by the ureter entering the bladder at a?
unusual angle or when length of ureter through the bladder wall is too short
What is a fistulous urinary tract when totally patent, or when only the center part is patent and is lined by urothelium or metaplastic glandular epithelium?
Patent Urachus/Urachal Cyst
Patent Urachus/Urachal Cyst can be seen on CT as heterogenous mass in midline anterior to bladder with peripheral enhancement and central low attenuation within mass. Infections and what may arise from the cysts?
Carcinomas (RARE)