Am I Eligible for a Stem Cell Transplant for AL Amyloidosis?

Determining if your body is healthy enough for an autologous stem cell transplant (ASCT) is one of the most complex evaluations your care team will conduct. Because the high-dose chemotherapy used in a transplant places immense physical strain on the body, doctors must carefully assess your ability to tolerate the procedure and recover safely.

There is no single universal test or “pass/fail” checklist. Instead, your doctors look at a combination of your organ function, your blood pressure, and your overall physical fitness ^[1]. Assessment thresholds can vary depending on the hospital’s specific protocols and the exact laboratory tests used, so one abnormal number does not automatically exclude you. Because this process is highly individualized, it is often reasonable to seek an evaluation at a specialized amyloidosis center.

Heart Function and Blood Pressure

For patients with AL amyloidosis, cardiac involvement is often the dominant factor in determining transplant risk ^[2]. Even if you do not feel heart-related symptoms, amyloid proteins can stiffen the heart muscle.

• Cardiac Biomarkers: Blood tests measuring NT-proBNP (or BNP) and Troponin reveal how much stress your heart muscle is experiencing. Doctors use these to stage the disease and estimate risk ^[3]. For example, in some risk models, an NT-proBNP level above 2,000 pg/mL indicates substantially higher transplant risk ^[2]. Conversely, a Troponin T level below 0.06 ng/mL is sometimes used as a baseline safety marker ^[4]. However, these are just examples used in specific protocols, not strict universal cutoffs, and must be interpreted alongside your kidney function and other tests.
• Echocardiogram (Heart Ultrasound): Doctors evaluate your heart’s pumping function, filling pressures, and wall thickness. A wall (septal) thickness greater than 15 millimeters is associated with higher risk ^[5], but this is evaluated together with overall heart function. Doctors also measure Global Longitudinal Strain (GLS), which shows how effectively the heart muscle fibers squeeze and pull, helping to categorize your specific risk level ^[3].
• Blood Pressure (Hemodynamics): You need cardiovascular reserve to safely undergo stem cell collection and transplantation. While some historical guidelines suggested a resting systolic blood pressure consistently above 90 mmHg as a safety marker ^[4], doctors are primarily looking for stability. Severe drops in blood pressure when you stand up (orthostatic hypotension) or persistent dizziness can complicate the transplant ^[6]. (Note: Never adjust your blood pressure medications or fluid intake without your team’s direct instruction).

Kidney Function and Protein Levels

Your kidneys filter waste from your blood, which can affect how certain chemotherapy drugs are cleared from your body.

• eGFR and Creatinine: These values estimate how well your kidneys are filtering blood. While historically doctors used a serum creatinine level of 1.7 mg/dL or lower as a general safety threshold ^[4], modern evaluations are more nuanced. Having reduced kidney function (such as an eGFR below 40 or 45) does not automatically disqualify you, but it does significantly increase the risk of acute kidney injury and the potential need for temporary or permanent dialysis during recovery ^[7][8].
• Serum Albumin: This is a vital protein in your blood. Low albumin (for instance, under 2.5 or 3.0 g/dL) is associated with a higher risk of fluid overload and kidney complications during transplant ^[8][9]. In amyloidosis, low albumin is frequently caused by the kidneys leaking protein into the urine, but it can also be due to liver involvement, malnutrition, inflammation, or fluid status.

Physical Fitness, Age, and Other Factors

• Performance Status: Doctors use tools like the ECOG scale to rate your activity level, self-care ability, and how much time you spend in a chair or bed. An ECOG score of 0 or 1 (meaning you are fully active or restricted only in physically strenuous activity) is ideal. A score of 2 or 3 (meaning you need more rest and assistance) substantially increases predicted transplant risks ^[1].
• Age Considerations: Chronological age alone is no longer an automatic exclusion. Highly experienced amyloidosis centers have performed transplants on carefully selected, highly fit patients in their late 60s and 70s ^[10][11]. However, risk generally rises with age and frailty, so older patients undergo rigorous individualized screening.
• Additional Assessments: Beyond the heart and kidneys, your team will also evaluate your lung function, liver health, nutritional status, any active infections, and your caregiver support system at home.

The Number and Severity of Organs Involved

Historically, if AL amyloidosis affected three or more major organs, a transplant was often considered too dangerous. Today, while multiorgan disease still increases overall risk and requires careful consideration, research has shown that the severity of the organ damage—particularly severe cardiac involvement—is often a stronger predictor of transplant safety than the simple count of involved organs ^[2][12].

What If You Aren’t Eligible Right Now?

If your doctors determine that a transplant is currently too risky, it does not mean you have no options. Many patients first receive induction therapy—a regimen of targeted medications designed to suppress or eradicate the abnormal plasma cells in your bone marrow. This stops the production of the abnormal light chains that form amyloid deposits.

It is important to understand the difference between a hematologic response (when blood tests show the abnormal proteins are reduced) and an organ response (when the function of organs like the heart or kidneys actually improves). Hematologic responses can happen quickly, but organ responses are variable and take much more time. If induction therapy eventually improves your organ function, you may be re-evaluated and become a candidate for a delayed (deferred) stem cell transplant ^[13][14].

⚠️ Important Safety Note

While you are being evaluated for treatment, do not wait for your next appointment if you experience new or worsening symptoms. Contact your medical team immediately or seek emergency care if you develop new fainting spells, severe shortness of breath, chest pain, rapid swelling or weight gain, markedly reduced urine output, or persistent dizziness.