Does CT contrast cause AKI?
In patients who undergo coronary angiography, exposure to contrast is in most cases the single reason for AKI, whereas in critically ill patients who are having a contrast-enhanced CT scan, AKI is more likely the result of multiple hits.
How is renal papillary necrosis diagnosed?
Diagnostic Procedures Although CT scanning, IVU, and ultrasonography findings can suggest the diagnosis of renal papillary necrosis, urologic intervention confirms the diagnosis and excludes other obstructing agents (ie, tumors, stones, blood clots).
Is CT contrast nephrotoxic?
Conclusion: Intravenous low-osmolality iodinated contrast material is a nephrotoxic risk factor, but not in patients with a stable SCr level less than 1.5 mg/dL. Many factors other than contrast material can affect post-CT AKI rates.
How does contrast cause renal failure?
Contrast medium related factors In the renal tubules, the excreted CM generates osmotic force causing marked increase in sodium and water excretion. This diuresis will increase intratubular pressure, which will reduce the GFR, contributing to the pathogenesis of acute renal failure.
Is renal papillary necrosis painful?
Symptoms of renal papillary necrosis may include: Back pain or flank pain. Bloody, cloudy, or dark urine. Tissue pieces in the urine.
What is renal medullary nephrocalcinosis?
Renal medullary nephrocalcinosis is the commonest form of nephrocalcinosis and refers to the deposition of calcium salts in the medulla of the kidney.
What are neoplasms of the renal medulla?
Neoplasms of the renal medulla constitute a heterogeneous group of tumors with characteristic histomorphology and variable imaging features. It is important to identify and distinguish these tumors from the common adenocarcinomas that constitute more than 90% of renal tumors.
What are the presenting symptoms of renal medullary carcinoma?
Presenting symptoms include gross hematuria, abdominal or flank pain, and, less commonly, weight loss, palpable mass, or fever. Renal medullary carcinoma is of epithelial origin and is thought to arise at the renal pelvic-mucosal interface 1. The tumor quickly grows to fill the renal pelvis and invade vascular and lymphatic structures.
What is the prognosis of translocation associated renal cell carcinoma?
Translocation associated carcinomas usually have an aggressive clinical course but t (6;11) (p21;q12) appears to have lower malignant potential in contrast to other translocation carcinomas ( MiT family translocation renal cell carcinomas ).