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The most common malignant renal parenchymal tumor is renal cell carcinoma (RCC), which accounts for 86% of the malignancies in the kidney. RCCs are typically isoechoic and peripherally located in the parenchyma, but can be both hypo- and hyper-echoic and are found centrally in medulla or sinus.
Approximately 40 to 60% of these lesions are ultimately found to be malignant, most commonly in the forms of cystic renal cell carcinoma and its multiloculated variant. [ 8 ] [ 9 ] [ 10 ] The remaining lesions are benign and include hemorrhagic cysts, chronic infected cysts, and multiloculated cystic nephromas.
For small exophytic lesions that do not extensively involve the major vessels or urinary collecting system, a partial nephrectomy (also referred to as "nephron sparing surgery") can be performed. This may involve temporarily stopping blood flow to the kidney while the mass is removed as well as renal cooling with an ice slush.
It may cause acute kidney injury. It is now more commonly used to describe diffuse, fine, renal parenchymal calcification in radiology. [2] It is caused by multiple different conditions and is determined by progressive kidney dysfunction. These outlines eventually come together to form a dense mass. [3]
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 February 2025. Medical condition Kidney cancer Other names Renal cancer Micrograph showing the most common type of kidney cancer (clear cell renal cell carcinoma). H&E stain. Specialty Oncology nephrology Urology Symptoms Blood in the urine, lump in the abdomen, back pain Usual onset After the age of ...
Gross appearance of a renal oncocytoma (left of image) and a slice of a normal kidney (right of image). Note the rounded contour, the mahogany colour and the central scar. In gross appearance, the tumors are tan or mahogany brown, well circumscribed and contain a central scar. They may achieve a large size (up to 12 cm in diameter).
CT scan of 11 cm Wilms' tumor of right kidney in 13-month-old. The majority of people with Wilms' tumor present with an asymptomatic abdominal mass which is noticed by a family member or healthcare professional. [18] Renal tumors can also be found during routine screening in children who have known predisposing clinical syndromes. [18]
Papillary renal cell carcinoma (PRCC) is a malignant, heterogeneous tumor originating from renal tubular epithelial cells of the kidney, which comprises approximately 10-15% of all kidney neoplasms. [1] Based on its morphological features, PRCC can be classified into two main subtypes, which are type 1 and type 2 (eosinophilic). [2]
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