Plasma cell flow cytometry

Flow cytometry passes cells through a laboratory instrument after applying tagged antibodies. The instrument detects marker patterns on each cell. Plasma cells normally make antibodies, but an abnormal group may show a restricted pattern or markers that differ from healthy plasma cells.

The test is usually performed on blood or a bone marrow sample, depending on the clinical question. It can support assessment of conditions such as plasma cell neoplasms, but it is not interpreted alone. Symptoms, blood counts, protein studies, imaging and the full tissue report may all affect the diagnosis.

Ask whether your sample will come from blood or bone marrow and whether fasting is needed; many flow cytometry tests do not require special preparation. Tell the team about medicines and recent treatments because they can influence the cells available for testing.

If a bone marrow sample is planned, wear comfortable clothing and arrange support if you expect soreness afterward. Results may be reported as a laboratory pattern rather than a single yes-or-no statement. Your clinician will combine them with other findings and explain what happens next.

After a bone marrow sample, contact the clinic for persistent bleeding, increasing redness, warmth, drainage or fever at the puncture site. Seek urgent help for heavy bleeding, fainting, severe pain or trouble breathing. A blood draw usually causes only short-lived tenderness or bruising, but report symptoms that worsen.

Ask which sample is being tested, what plasma-cell markers are being assessed, whether the sample was adequate, when the report is expected, and how the result will be combined with protein tests, imaging and other laboratory findings.