The " muddy brown cast " seen in acute tubular necrosis is a type of granular cast.
2.
Their discovery is likely rare, due to the infection-fighting efficiency of neutrophils, and the possibility of misidentification as a fine granular cast.
3.
The second-most common type of cast, granular casts can result either from the breakdown of cellular casts or the inclusion of aggregates of plasma proteins ( e . g ., albumin ) or immunoglobulin light chains.
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