| renal calculus | A calculus occurring within the kidney collecting system. Synonym: nephrolith. (05 Mar 2000) |
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| renal cancer | <radiology> About 8300 adults die each year from kidney cancer. An estimated 18100 new cases are diagnosed each year, comprising 2% of all cancers. The average age at diagnosis is 55-60 years., adenocarcinoma (hypernephroma), 80% of renal carcinoma, 66% male, associated with smoking, transitional cell or squamous carcinoma, 15% of renal carcinoma, 50% male, associated with calculous disease Excretory urography may reveal the primary lesion, the degree of local extension and evidence of compression or deviation of the ureter. REF: Rubin P. Clinical Oncology. Chapter 17. (12 Dec 1998) |
| renal capsule | The fibrous connective tissue that surrounds each kidney. (12 Dec 1998) |
| renal carcinosarcoma | <tumour> Obsolete term for Wilms' tumour. (05 Mar 2000) |
| renal cast | Any type of cast formed in a renal tubule, and found in the urine consisting of various materials, e.g., albumin, cells, blood. Synonym: tube cast. (05 Mar 2000) |
| renal cell cancer | Cancer that develops in the lining of the renal tubules, which filter the blood and produce urine. Also called renal cell carcinoma. (12 Dec 1998) |
| renal cell carcinoma | <oncology, tumour> The most common form of kidney cancer which occurs when the cells lining the renal tubule undergo cancerous changes. There are approximately 18,000 new cases of renal cell carcinoma (hypernephroma) per year in the U.S. With about 8,000 deaths annually. Smoking is considered a major risk factor. Kidney dialysis patients are at increased risk for the development of hypernephroma. Family history for renal cell carcinoma is also considered a risk factor. Symptoms include haematuria, flank pain, abdominal pain, back pain, weight loss and abdominal swelling. (27 Sep 1997) |
| renal circulation | The circulation of the blood through the vessels of the kidney. (12 Dec 1998) |
| renal colic | Severe colicky pain caused by the impaction or passage of a calculus in the ureter or renal pelvis. (05 Mar 2000) |
| renal collar | In the embryo, a ring of veins around the aorta below the origin of the superior mesenteric artery. (05 Mar 2000) |
| renal columns | The prolongations of cortical substance separating the pyramids of the kidney. Synonym: columnae renales, Bertin's columns. (05 Mar 2000) |
| renal corpuscle | The tuft of glomerular capillaries and the capsula glomeruli that encloses it. Synonym: corpusculum renis, malpighian corpuscles. (05 Mar 2000) |
| renal cortex | The part of the kidney consisting of renal lobules in the outer zone beneath the capsule and also the lobules of the renal columns that are extensions inward between the pyramids; contains the renal corpuscles and the proximal and distal convoluted tubules. Synonym: cortex renis. (05 Mar 2000) |
| renal cortical adenoma | <tumour> One of the usually small adenoma's sometimes found in the renal cortex and derived from renal tubular tissue. (05 Mar 2000) |
| renal cortical lobule | One of the subdivisions of the kidney, consisting of a medullary ray and that portion of the convoluted port (renal corpuscles and convoluted tubules) associated with its collecting duct. Synonym: lobulus corticalis renalis, renal cortical lobule, renculus, reniculus, renunculus. (05 Mar 2000) |