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Renal oncocytoma of the right kidney at CT. Renal oncocytomas are often asymptomatic and are frequently discovered by chance on a CT or ultrasound of the abdomen. Possible signs and symptoms of a renal oncocytoma include blood in the urine , flank pain, and an abdominal mass.
The RENAL Nephrometry Scoring System is used to measure the complexity of kidney tumors for determining whether a renal mass is appropriate for partial or radical nephrectomy, and is estimated by CT scan as follows: [7] The nephrometery score takes into account the size of the tumor (Radius), how much of the tumor is inside or outside of the ...
An oncocytoma is a tumor made up of oncocytes, epithelial cells characterized by an excessive amount of mitochondria, resulting in an abundant acidophilic, granular cytoplasm. [ 1 ] [ 2 ] The cells and the tumor that they compose are often benign but sometimes may be premalignant or malignant .
Oncocytes (left of image), as seen in a renal oncocytoma. H&E stain. An oncocyte is an epithelial cell characterized by an excessive number of mitochondria, resulting in an abundant acidophilic, granular cytoplasm. Oncocytes can be benign or malignant.
Kidney cancer, also known as renal cancer, is a group of cancers that starts in the kidney. [4] Symptoms may include blood in the urine, a lump in the abdomen, or back pain. [1] [2] [3] Fever, weight loss, and tiredness may also occur. [1] [2] [3] Complications can include spread to the lungs or brain. [6]
Gross examination of a kidney (right of image) with a renal oncocytoma (left of image).. Gross processing, "grossing" or "gross pathology" is the process by which pathology specimens undergo examination with the bare eye to obtain diagnostic information, as well as cutting and tissue sampling in order to prepare material for subsequent microscopic examination.
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The average number of kidney tumors found in a person with BHD is 5.3, though up to 28 tumors have been found. [7] Hybrid oncocytoma/chromophobe carcinoma, found in 50% of cases, [8] is the most commonly found cancer, followed by chromophobe renal carcinoma, clear cell renal carcinoma, renal oncocytoma, and papillary renal cell carcinoma.