Stem Cell Donation

Making an Informed Decision

Before collection, you'll sign consent forms and talk with your team about the exact procedure, all the risks, and what recovery is like. Your team makes sure you truly understand what you're agreeing to. You can ask all your questions and take time to feel ready.

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Overview

Informed consent is a real conversation with your medical team, not just paperwork you sign. You'll read about your exact procedure, the risks specific to your health, and what recovery is like. Your team walks you through every detail and answers all your questions. Never sign anything you don't fully understand.

Donating is a serious choice with real effects. Consent forms are honest about risks, from small ones like bone pain to very rare serious ones. That honesty means you're choosing based on facts. You can always change your mind before collection actually starts.

Consent principles. Remember these key points:

Informed consent is a conversation, not just forms
You must understand everything you're agreeing to
Risky procedures are clearly explained
Alternatives to your chosen method are discussed
Refusal or withdrawal is always fully respected

Understanding what you are agreeing to

The consent document

Before collection, you'll sign an informed consent document that outlines the donation procedure, potential risks, and recovery expectations. You'll read (or will be told) about the specific risks of your collection method and confirm you understand them. This document protects you by ensuring the center gets your voluntary, informed agreement.

The consent conversation

The consent process includes a detailed conversation with your center's physician or coordinator. They'll walk through the document, explain anything that's unclear, and answer your questions. You should never sign without understanding what you're consenting to.

Consent is genuinely voluntary. You can refuse collection, withdraw consent, or ask for more time to think. Pressure to proceed against your wishes is unethical and illegal. If you feel pressured, tell your coordinator or the center's medical director immediately.

PBSC consent details

For PBSC collection, you're consenting to filgrastim injections for 4-6 days, apheresis collection lasting 2-4 hours over 1-2 days, and a recovery period of 1-2 weeks.

PBSC procedures. You consent to:

Filgrastim injections with expected side effects (bone pain, fatigue)
Apheresis collection process lasting 2-4 hours
Possible central catheter placement if needed
Multiple blood draws for monitoring
Possible splenic rupture (rare, <1%), blood clots (rare)
Rare acute leukemia-like disease
Follow-up appointments and monitoring

You understand the collected stem cells go to a recipient and might not engraft (take).

Bone marrow consent details

For bone marrow collection, you're consenting to surgery under general anesthesia and post-operative recovery.

Bone marrow procedures. You consent to:

General anesthesia with associated risks (nausea, sore throat, rare serious complications)
Bone marrow aspiration through multiple needle punctures
Post-operative pain and activity limitations
Recovery period with possible walking or sitting difficulty
Processing of recovered marrow for transplant recipient
Follow-up appointments and recovery monitoring

What you can know about the recipient

Family vs. unrelated donations

The amount of information you'll learn about the recipient varies by donation type and center policy. For family donations, you know the recipient's identity and can share information as you choose.

For unrelated donations, you typically learn basic information: the patient's age (or age range) and the disease being treated (leukemia, lymphoma, etc.), and sometimes their gender. You likely won't learn the patient's name, city of residence, or any identifying details. This protects the recipient's privacy.

Post-transplant contact options

Contact options. Possibilities include:

Some centers allow donor-recipient letter exchange (optional, both must consent)
Some allow contact information exchange after transplant (if both want it)
Recipients have varying privacy preferences (some want anonymity, some want contact)
Your preference will be respected throughout
You'll decide later if contact is wanted, with counselor support

The point of no return

Before collection starts

There's a moment during collection where you've crossed a threshold. For PBSC donors, this is when apheresis begins—blood flowing through the machine. For bone marrow donors, this is when you're under anesthesia on the operating table.

Before this point, you can withdraw. If you're scheduled for apheresis tomorrow and you change your mind tonight, you can call and say no. If you're in pre-op, you can tell the anesthesiologist you've changed your mind before they put you under. This is uncomfortable—there are consequences for the waiting patient—but it's your right.

Why mid-procedure stopping is risky

Once collection is underway, stopping mid-procedure creates medical risks. For PBSC, stopping mid-apheresis means blood in the machine must be safely returned. For bone marrow, stopping mid-surgery risks bleeding and infection. That's why informed consent emphasizes being sure before you start.

Cold feet is normal

Many donors feel nervous or scared before collection. That's normal. Talk with your coordinator about your fears. Scary feelings don't mean you shouldn't donate—they might just mean you need support and reassurance.

Support available. You can:

Talk with your coordinator about any fears
Mental health counseling can help
Your feelings are understood and supported
Take the time you need to feel ready

Changing your mind

Withdrawal is always an option

You can change your mind before the point of no return. If you're enrolled in evaluation and decide donation isn't for you, tell your coordinator. You're withdrawing, and that's okay. The patient's team will search for another donor.

Withdrawal feels uncomfortable—you might worry you're letting people down. But good medical practice requires donors who truly want to donate. Coercing or guilt-tripping someone into donation leads to worse outcomes. If you withdraw, you're actually doing the right thing.

Processing guilt and complicated feelings

If you do feel guilt, talk about it. Your coordinator or a counselor can help you process the decision. Sometimes guilt is healthy reflection; sometimes it's pressure that wasn't actually there. Talking through it helps clarify what's real.

Key points. Remember:

Changing your mind is always okay at any time
Withdrawal is respected and legally protected
Guilt about withdrawal is understandable but you have no obligation to donate
Talking with your coordinator or counselor helps
You're doing the right thing by being honest about your readiness

Additional Detailed Information

Additional Information

Informed consent documentation standards

FDA consent form requirements. The FDA requires that donor informed consent forms include: description of the apheresis or surgical procedure, identification of risks and benefits, acknowledgment that the donation is voluntary, statement of right to refuse or withdraw, and donor signature. Forms must be in the donor's native language or interpreted verbally.

Consent form content. Required elements include the specific collection procedure, expected volume of cells collected, possible need for multiple procedures, risks including those specific to the donor's health status, pain and discomfort expectations, recovery timeline, and alternatives to collection. Forms explain that collected cells go to a recipient and outline any post-collection contact arrangements.

Risk disclosure specificity

Procedure-specific risk disclosure. PBSC consent specifies that filgrastim risks include bone pain (70-90% incidence), that splenic rupture occurs in <1% of donors, and that platelet transfusions or RBC transfusions might be needed if blood counts drop. Bone marrow consent specifies anesthesia risks including respiratory depression, allergic reaction, and malignant hyperthermia (rare, ~1:10,000).

Withdrawal consent implications

Patient notification of withdrawal. If a donor withdraws after confirmatory testing, the patient's transplant center is notified. Some patients have already begun conditioning chemotherapy in anticipation of donor stem cells. Patient teams develop backup plans: searching for another donor, pursuing alternative therapies, or in some cases deciding the patient is too ill to proceed with transplant.

Withdrawn donor record tracking. Once a donor withdraws, they're typically removed from active donor status in the registry. However, donors can re-enlist later if they reconsider. Their original HLA sample is retained, allowing re-activation if matched again.

Written By:

Transplants.org Staff

Last Reviewed: February 26, 2026

Informed By:

Transplants.org, with participation from 23 leading U.S. transplant centers, led the largest comparative analysis of patient educational materials in transplant history. We recognize the participating centers who helped inform and inspire our direction with initial patient-centered educational content: