Hypoalbuminemia is defined as albumin levels below 3.5gm/dl.
Muehrcke's Lines (side-to-side parallel white lines that do not move with nail growth) are caused by a nail bed abnormality, which in turn is probably due to hypoalbuminemia.
Hypoalbuminemia can be caused by certain heart conditions such as congestive heart failure or pericarditis that lead to low albumin levels in the blood.
Simple kidney tests like BUN and creatinine are usually done at the same time as serum albumin.
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