Cryoglobulin, Serum, Qualitative, Cold Incubation

What Is Being Tested

Cryoglobulins are abnormal proteins, usually antibodies, that become solid or gel-like when blood is chilled below normal body temperature and return to liquid when warmed. This test detects whether these proteins are present in your serum.

Why Your Doctor Ordered It

Your doctor may order this test if you have symptoms such as unexplained rash, joint pain, numbness or tingling in the hands and feet, kidney problems, or signs of a blood or immune disorder. It can help investigate conditions linked to cryoglobulins.

How the Sample Is Collected

A blood sample is drawn from a vein, usually in your arm. The laboratory must keep the sample warm until it is separated and then chill it for a period, often several days, to see whether cryoglobulins form. Proper handling is important for accurate results.

What the Results Mean

A result is generally reported as positive (cryoglobulins detected) or negative (none detected). A positive result does not by itself diagnose a specific disease; your doctor will interpret it together with your symptoms, other lab tests, and medical history. Results can be affected by how the sample is handled.