The Cryoglobulins Screening (Qualitative) Test is a laboratory test used to detect the presence of cryoglobulins, which are abnormal proteins in the blood that precipitate (clump together) when exposed to cold temperatures and dissolve again when warmed.

Cryoglobulins may be associated with various medical conditions, including autoimmune disorders, chronic infections, and certain blood-related diseases. The presence of cryoglobulins can affect blood vessels and circulation, leading to symptoms such as skin rashes, joint pain, weakness, numbness, or kidney problems.