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A renal cyst is a fluid collection in or on the kidney. There are several types based on the Bosniak classification. The majority are benign, simple cysts that can be monitored and not intervened upon. However, some are cancerous or are suspicious for cancer and are commonly removed in a surgical procedure called nephrectomy.
The Bosniak classification is divided into four groups going from I, corresponding to a simple cyst, to IV, corresponding to a cyst with solid parts and an 85–100% risk of malignancy. [1] In polycystic kidney disease, multiple cysts of varying size in close contact with each other are seen filling virtually the entire renal region.
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 January 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 45 ...
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The Bosniak classification system for cystic renal lesions classifies them into groups that are benign and those that need surgical resection, based on specific imaging features. [ 48 ] The main imaging tests performed in order to identify renal cell carcinoma are pelvic and abdominal CT scans, ultrasound tests of the kidneys (ultrasonography ...
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Symptoms include “sensitivity to light, dizziness, pain behind the eyes, nausea, vomiting, and rash,” the CDC says, while more serious disease includes meningitis, encephalitis, and bleeding.
[5] [10] The cysts do not cause other symptoms [5] and lung function is usually normal. [6] More than 83% of people with BHD have cysts, but the syndrome does not cause conditions like progressive chronic obstructive pulmonary disease or generalized respiratory failure , [ 2 ] though it does cause emphysema . [ 4 ]