a cellular cast derived from a kidney tubule. In certain kidney diseases, notably acute glomerulonephritis, abnormal collections of renal tubular cells are shed from the kidney, often as a cast of the tubule. The casts can be observed on microscopic examination of the centrifuged deposit of a specimen of urine. Their presence in the urine indicates continued activity of the disease.
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a dark colored urinary cast of a granular or cell-like substance, seen in a variety of renal diseases.Medical dictionary. 2011.