Question 1

What is the difference between SPEP and immunofixation electrophoresis?

Accepted Answer

However, immunofixation electrophoresis (IFE) is a more sensitive technique for the identification of small M-proteins found in patients with amyloidosis, early or treated myeloma or macroglobulinemia, solitary plasmacytoma, or extramedullary plasmacytoma. SPEP is typically used as a screening test to detect and measure abnormal proteins, while IFE is often performed as a follow-up test when SPEP results are abnormal. IFE can identify the specific type of abnormal protein and detect smaller amounts that SPEP might miss.

Question 2

Can SPEP detect multiple myeloma in early stages?

Accepted Answer

Serum protein electrophoresis, when used as a screening test, is useful in the detection of various pathophysiologic states such as inflammation, protein loss, gammopathies, and other dysproteinemias. SPEP is used as an initial screening procedure for patients with clinical suspicion for multiple myeloma. While SPEP can detect abnormal protein patterns associated with multiple myeloma, it cannot provide a definitive diagnosis alone. Additional tests such as bone marrow biopsy, imaging studies, and other laboratory tests are typically needed to confirm a diagnosis of multiple myeloma.

Question 3

What does an M spike on SPEP results mean?

Accepted Answer

When multiple myeloma develops, abnormal plasma cells produce large amounts of identical proteins, creating a spike or peak in the gamma globulin region that is clearly visible on the SPEP pattern. The M spike is a blood test result that shows M protein. M protein, or monoclonal protein, is produced by abnormal plasma cells. Tests for M protein are often used to help diagnose and monitor multiple myeloma. However, an M spike does not automatically mean cancer --- it can also be present in MGUS, a usually benign condition, or other plasma cell disorders that require monitoring but may not need immediate treatment.

Question 4

How often should SPEP testing be repeated for monitoring?

Accepted Answer

The frequency of SPEP testing depends on the specific condition being monitored and individual risk factors. Once this test has confirmed the disease, the electrophoresis is done at regular intervals to track the effectiveness of treatment and recurrence. For individuals with MGUS, testing may be recommended annually or every few years, while those with active multiple myeloma or other plasma cell disorders may require more frequent monitoring every few months. Healthcare providers determine the appropriate testing schedule based on the specific diagnosis, treatment status, and individual patient factors.

Question 5

Can medications or other factors affect SPEP results?

Accepted Answer

Other things can affect your results, such as some vaccines (if you got them in the past six months) and certain medicines. Your medical history and any medications you take can affect your SPEP results, so your healthcare team will consider these factors when interpreting the lab values. Factors that may influence results include recent vaccinations, certain medications, dehydration, acute infections, and chronic inflammatory conditions. It is important to inform healthcare providers about any medications, supplements, or recent medical treatments when discussing SPEP results. In some cases, repeat testing may be recommended if temporary factors may have affected the initial results.

Question 6

What happens if my SPEP results show abnormal protein levels?

Accepted Answer

Your healthcare provider will review your results and let you know what comes next. Sometimes, your provider will order additional blood tests, urine tests or imaging tests to get closer to a diagnosis. Although SPEP and IFE tests provide insight into abnormal protein levels, they don't pinpoint the exact cause. Depending on your results, your medical team may order additional tests, such as a bone marrow biopsy or other blood tests, to confirm a diagnosis or explore other potential causes. The specific follow-up depends on the type and degree of abnormality found, along with individual symptoms and medical history.

Population	Reference Range	Notes
Adults	Total protein: 6.4-8.3 g/dL	Normal total protein levels in serum
Adults	Albumin: 3.5-5.0 g/dL	Primary protein component maintaining blood volume
Adults	Alpha-1 globulin: 0.1-0.3 g/dL	Includes proteins involved in inflammation response
Adults	Alpha-2 globulin: 0.6-1.0 g/dL	Contains proteins for transport and inflammation
Adults	Beta globulin: 0.7-1.2 g/dL	Includes proteins for cholesterol transport and immune function
Adults	Gamma globulin: 0.7-1.6 g/dL	Contains immunoglobulins (antibodies) for infection fighting

Protein Electrophoresis (SPEP)

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