CVPR First Aid: renal malignancies Flashcards
What is hydronephrosis
Distention/dilation of renal pelvis and calyces
Dilation occurs proximal to the site of pathology
Causes of hydronephrosis
Usually caused by urinary tract obstruction (eg, renal stones, severe BPH, congenital obstructions, cervical cancer, injury to uterer)
Other causes include;
retroperitoneal fibrosis
Vesicoureteral reflux
Signs of hydronephrosis
Creatinine becomes elevated if obstruction is bilateral or if patient has an obstructed solitary kidney
Leads to compression and possible atrophy of renal cortex and medulla
What is the most common renal malignancy?
Renal cell carcinoma
Renal cell carcinoma most commonly occurs in?
Men 50-70
↑incidence with smoking and obesity
Renal cell carcinoma is associated with?
Paraneoplastic syndromes (“PEAR”-aneoplastic) eg, PTHrP, Ectopic EPO, ACTH, Renin
Gene deletion on chromosome 3 (sporadic or inherited as Von Hippel-Lindau Syndrome)
RCC = 3 letters = Chromosome 3
Renal cell carcinoma originates in?
Originates from PCT → invades renal vein (may develop variocele if left sided) →IVC → hematogenous spread → metastasis to lung and bone
Presentation of Renal cell carcinoma
Hematuria
Palpable masses
2° polycythemia
Flank pain
Fever
Weight loss
Treatment of Renal cell carcinoma
Surgery/ablation for localized disease
Immunotherapy (eg, aldesleukin) or targeted therapy for metastatic disease
Rarely curative
Resistant to chemotherapy and radiation therapy
Describe the cells in Renal cell carcinoma
Polygonal clear cells
Filled with accumulated lipids and carbohydrate
Often golden-yellow die to high lipid content
Pg 583
What is renal oncocytoma
Benign epithelial cell tumor arising from collecting ducts pg 583 pic (well-circumscribed mass with a central scar
Large eosinophilic cells with abundant mitochondria without perinuclear clearing (vs chromophobe renal cell carcinoma)
Presentation of renal oncocytoma
Painless hematuria
Flank pain
Abdominal mass
Treatment of renal oncocytoma
Often resected to exclude malignancy
Pictures of renal oncocytoma
583
What is the most common renal malignancy of early childhood (2-4)
Wilms tumor