Transthyretin (Pre Albumin)

Formalin-fixed, paraffin embedded tissue block or cell block, or 1 unstained charged slide for each test requested plus 3-4 additional unstained slides cut at 4 microns. Adequate space on each slide for control tissue is required.

This is a send out test.

Transthyretin identifies a serum protein produced by the liver and choroid plexus. It forms the basis of one subtype of amyloid, identification of which, and distinction from immunoglobulin light chain derived amyloids, can be made by immunohistochemistry. Transthyretin can also serve as a marker of choroid plexus tumors.