You might have heard about Stem Cell Transplants. In reality, this is a highly effective, life-saving treatment for certain medical conditions. However, it does take some time to fully recover after the procedure. Shall we discuss this in more detail, just like explaining it to a friend?
What are Stem Cells?
Simply put, stem cells are a very special type of cell in our body. These cells have an amazing ability to develop into various other types of cells. The stem cells used in the stem cell transplants we are discussing are responsible for creating the essential cells in our blood. This means:
- Red blood cells: These carry oxygen throughout the body.
- White blood cells: These cells protect us by fighting germs and diseases that enter our body.
- Platelets: These help blood clot when an injury occurs.
Think of stem cells like a lump of clay that can be molded into anything. Depending on the need, they can be used to create red blood cells, white blood cells, or platelets.
Why are Stem Cell Transplants performed?
Now, let's look at the situations where stem cell transplants are helpful. This is not a procedure for every illness, but in certain severe cases, it is the best solution.
- For those with severe blood-related diseases: For example, certain types of leukemia where the bone marrow does not function properly.
- For those with some kinds of cancer: Such as lymphoma or multiple myeloma.
- For those with severe immune deficiency: Their immune system is too weak to fight off diseases.
- For those with certain autoimmune diseases: For example, in conditions like lupus, where the body's own cells attack the body.
- Other hereditary blood-related diseases: This treatment is also very successful for conditions like thalassemia or sickle cell disease.
Where do we get these Stem Cells from?
Right, now you might be wondering where we get these valuable stem cells. There are three main sources from which doctors can obtain these cells:
1. Bone Marrow: This is the most well-known method. This is often referred to as a 'bone marrow transplant'. Bone marrow is the soft, sponge-like tissue inside our large bones. This is where blood cells are produced.
2. Bloodstream: By administering special medications, stem cells from the bone marrow are released into the bloodstream, and then they can be collected through a machine, similar to donating blood. This is called Peripheral Blood Stem Cell (PBSC) collection.
3. Umbilical Cord Blood: After a baby is born, the blood remaining in the umbilical cord after it is removed contains these valuable stem cells. These can be collected and used for someone in need.
The person who provides these stem cells is called a 'donor'. A very important point is that in some illnesses, the patient can be their own donor. This means their own stem cells are collected before treatment begins, frozen, and then transplanted back into them when needed. This is called an 'Autologous Transplant'.
However, most of the time, someone else donates these cells. This is called an 'Allogeneic Transplant'. If taking stem cells from someone else, their genetic makeup, especially the markers known as HLA (Human Leukocyte Antigen), must be a close match. To be precise, every cell in our body has something like an ID card. These ID cards must be very similar, otherwise, the body will not accept the new cells. Usually, a sibling of the patient is the best match. Sometimes, there are cases where a parent or an unrelated donor is a match. There are large registries available to find matching donors.
What happens if a matching donor is not found?
Think about it, if the stem cells from the donor do not match exactly (sometimes even with a good match, these issues can occur to varying degrees), two main problems can arise:
1. Rejection: In this case, the patient's immune system attacks the newly arrived donor cells. It thinks, "These are not our body's cells, they are like foreign invaders," and tries to destroy them. To prevent this, immunosuppressive medications are given.
2. Graft-versus-Host Disease (GVHD): This is the opposite. The newly transplanted donor immune cells (especially T-lymphocytes) start attacking the patient's healthy cells, thinking, "This body is not ours." This can affect areas like the skin, liver, and intestines. There are medications to control this as well.
How is the Stem Cell Transplant process carried out?
Alright then, let's see how this transplant process works. It is a multi-step procedure.
1. Preparation:
Before the stem cell transplant, doctors insert a 'central line' or a 'central venous catheter'. This is like a large, special IV line. It is inserted under the skin in the neck, chest, or groin into a large vein near the heart. Compared to a standard IV, this central line can be kept in the body for a longer period. It makes it very easy for doctors and nurses to administer medication, take blood samples, and deliver the transplanted cells. There is no need for frequent needle pricks.
2. Conditioning Treatment:
Stem cell transplants are performed in a special unit of the hospital. First, the person receiving the donor cells (the patient) is given high doses of chemotherapy and/or radiation therapy over several days. This is called conditioning treatment. This is done for two main reasons:
- To destroy the bad, harmful cells that caused the illness (e.g., cancer cells, non-functioning bone marrow cells).
- To weaken their immune system. This allows the newly provided donor cells to settle in (engraftment) without being rejected.
3. Stem Cell Transplant:
After the conditioning treatment is complete, a rest period of one or two days is provided. Then, the stem cells collected from the donor (similar to a blood donation) are infused into the patient through a central line. This is a process that takes several hours. These cells travel through the bloodstream to the bone marrow, where they settle and begin to produce new, healthy blood cells.
What happens after the transplant?
After a person receives a stem cell transplant, it takes time for their body to produce new red blood cells, white blood cells, and platelets. It usually takes about 2–4 weeks for these new cells to begin functioning. During this period, the risk of infections, bleeding, and other complications is very high because the old blood cells have been depleted and the new ones have not yet reached sufficient levels.
Most patients stay in a specialized hospital room for 3 to 5 weeks (sometimes longer) after the transplant. During this time, the medical team monitors the following closely:
- Daily blood tests to check if the transplanted stem cells are producing new blood cells.
- Medications to prevent rejection and Graft-versus-Host Disease (GVHD).
- Antibiotics, antifungals, and antivirals to prevent infections.
- Transfusions of red blood cells or platelets, if necessary.
- Monitoring the function of vital organs such as the liver and kidneys.
- Prompt treatment for any issues such as mouth sores, vomiting, diarrhea, infections, bleeding, rejection, or GVHD.
- Ensuring the patient receives adequate nutrition. Sometimes, tube feeding or Total Parenteral Nutrition (TPN) may be required.
- Ensuring that everyone entering the room strictly follows infection control protocols. This means:
- No one with any illness (even a common cold) is allowed to visit the patient.
- Everyone must wash their hands thoroughly before entering the room.
- Everyone must wear a mask, gloves, and a gown.
How can parents help (if the patient is a child)?
After a child receives a stem cell transplant, it takes 6 to 12 months, or sometimes longer, for their immune system to fully recover. Until then, even minor infections can be very serious for the child. Even a common cold can be dangerous. To help protect your child from infections, follow these steps:
- Ensure that your child, family members, and authorized visitors wash their hands frequently and thoroughly using antibacterial soap and/or hand sanitizer. This is the most important step.
- Do not allow anyone who is ill to be near the child.
- Bathe the child daily using a mild shampoo and soap to keep their skin clean.
- Follow the doctor's instructions strictly regarding:
- When the child can return to school or other public places (crowded areas, cinemas, shopping malls).
- When the child needs to wear a mask while going out.
- What foods are safe for the child to eat and which ones to avoid (e.g., raw salads, undercooked meat or fish).
- Whether the child can be around pets and if they are allowed to touch them.
What else should we know?
Most children (and adults) gradually recover after returning home from the hospital following a stem cell transplant. However, both the hospital stay and the recovery period at home can be a significant challenge for the patient and their family, both mentally and physically.
“Do not try to go through this journey alone. Ask for help.”
Seek support from other family members, friends, your medical team, a counselor, or a social worker. You can only take good care of your patient (or child) if you take good care of yourself.
To help your patient recover and stay healthy, do the following:
- Attend all follow-up doctor visits and administer medications exactly on time.
- Provide support and encouragement during physical changes caused by chemotherapy and/or radiation (e.g., hair loss, fatigue, skin changes).
- Help them cope with the loneliness and isolation caused by being away from friends and family during the recovery period. Facilitate contact through video calls.
- Ask if the patient would like to speak with a counselor or social worker to help manage feelings of sadness, fear, or anger that may arise during recovery.
- Help the patient (especially if they are a child) establish a simple daily routine that includes light exercise (if approved by the doctor), regular meals, and activities they enjoy, such as playing, reading, or drawing.
When should we see a doctor immediately?
Even after returning home, there are certain risks. If any of the following symptoms occur, contact your doctor immediately without a moment's delay, or take the patient to the hospital:
- A fever of 38.0°C (100.4°F) or higher (this is the most critical warning sign).
- Runny nose, cough, chest tightness, or difficulty breathing.
- Persistent vomiting or diarrhea.
- Black, tarry stools (this may be a sign of intestinal bleeding).
- Easy bruising or uncontrollable bleeding (e.g., from the nose or gums).
- Blood in the urine or a change in the color of the urine.
- Severe headache, dizziness, or blurred vision.
- Coughing up blood or a nosebleed that cannot be controlled after a few minutes.
- Any new skin rash.
Final important points to remember
Stem cell transplantation can be a highly successful, life-changing treatment for certain serious illnesses. However, it is a major process that requires time, patience, and dedication to recover. The most important things are to follow medical advice precisely, provide the patient (or child) with love, affection, and unwavering support, and especially, protect them from infections.
Remember, you and your patient are not alone on this challenging journey! The medical team, family, and friends are all with you. If you have any questions or doubts, no matter how small, do not hesitate to ask your medical team. They are there to help you.
Nirogi Lanka: Stem Cell Transplant, bone marrow transplant, blood disorders, cancer, immunity, child health, Sinhala medical information
