October 15, 2025

David Baldwin

David Baldwin

Noah's Dad

Whew, it’s been a whirlwind of a week and it’s not over yet. The very short report is: the bone marrow test was yesterday, results won’t be until Friday, and… Noah just got home today. What?!

Okay, to fill in some gaps here: Yesterday’s procedures were a lumbar puncture and bone marrow test.

The lumbar puncture (spinal tap) was again testing for leukemia in the CNS (Central Nervous System). Chemo was also delivered and, as far as I know, this will be the case anytime this procedure is done. We already got the result of this test and, as it was a month ago, no leukemia was detected in the CNS. We were pretty sure this would be the case, but you never know.

The bone marrow test involves collection of a liquid and solid sample. The first time this was attempted over a month ago, the bone marrow was full of blast cells and too dry for a full liquid sample. There was still enough of a sample to determine the absence of the FLT-3 mutation. This took 6 attempts at collecting a bone and marrow core so Noah has a lot of marks around his hips. During yesterday’s procedure it only took one attempt.

As mentioned, the results of this test won’t be available until Friday. This is MRD (Measurable Residual Disease) testing, which can detect one cancer cell in as many as a million cells depending upon various factors. The idea here is to test whether there are still cancer cells present. The hope is, of course, that this first round of chemo results in undetectable cancerous cells. I say “undetectable” because the test is not guaranteed to detect everything.

In the last post, I noted that Noah’s counts were very low. Just in the last few days those have crept up a good bit. The ANC is still low (just over 200) and they typically want over 500, but the sense from the doctors is it’s ramping up now. Probably moreso, some other key levels have either held or increased. Hemoglobin has held for 5 days at 9.5. Platelets held in the 50s for five days and then jumped to 98 today. I’m sometimes skeptical of jumps like this because I’ve seen lab errors / variability for hemoglobin, but perhaps that’s less of a problem for platelets. Neutrophils also jumped to 11% today and monocytes at 34%. Again, I’ve seen swings there, but the trend is good. The APC (neutrophils + monocytes) we wanted prior to doing this test was 300. Just five days ago that APC was sitting at 60. Today it’s all the way up to 945.

Regardless of the result of the MRD testing, induction 2 will happen. In between induction 1 and 2, if possible, the doctor wanted to get Noah home. Due to the testing being done and his counts being “good enough” the doctor wanted him to get as much time at home as possible. The next steps are pretty clear: if cancer cells are detected, Noah will be re-admitted to the hospital next Tuesday. If no cancer cells are detected, he’ll be here for about two weeks.

While we knew if counts went up he’d likely get to come home for a bit, it’s probably a good day (or three!) earlier than we might have expected. At the same time, we’ve never been so thrilled to get booted from a place. As I’m furiously typing this update I can look over to my right and see Noah and Micah sitting together on the couch. It’s hard to predict what the future holds, but he is here NOW and nothing can take this moment away.

Mayumi and I are going to have to learn to play nurse posthaste. We got a short session on the central line flush and heparin lock today. We’re going to need to do that ourselves on Saturday which we’re a little nervous about, but we’ll get it done. We’ll need to monitor him closely for various symptoms, most notably, fever. Between the low counts and having a central line, any fever requires immediate intervention.

When we left the hospital, Noah’s first taste of fresh air ended up with a dizzy spell and sleepiness. At the moment (just about 8pm) he’s got a lot of energy. We used wipes for a “shower” rather than a real shower. We’re probably going to tackle a shower tomorrow, but that can be tricky to avoid getting the central line dressing wet. We’re really hoping to avoid having to change that dressing because we’ve watched nurses struggle with that process, let alone us yahoos.

Additional notes:

  • This note deserved a post in its own right but, like I said, this week has been a lot. Remember back when we said getting an Asian/Caucasian match for a bone marrow transplant was almost too overwhelming to consider? Well, we sent off Micah’s sample almost a month ago now and it seemed like kind of a shot in the dark that he could be a match. The probability of a sibling match is 25%. Sometime in the last few weeks I may or may not have stated something to the effect of “I wish we’d had like 16 kids” (Mayumi was right again). But, but…Noah’s one and only sibling is indeed a full match! We hope it does not come to it to need a transplant, but getting to remission the first time will be hard enough. If we get there, the next battle would be staying there, and relapse is sadly common. In the case of relapse, transplant would almost surely come into play and it’s comforting to know his best fighting chance could come from the little dude sitting beside him.

  • So, yes, he is at home and I’m guessing some are wondering about visitors. Similar to the hospital, while we wish we could just say “come on over”, his counts are still low and we want to try to avoid any infections as best we can. The hospital room wasn’t perfectly sealed and neither will be our home. Micah will be here and also attending school every day. Regardless, we’re going to keep it to just us four in the house. Perhaps there’s other creative ways he can have some interactions, but we’ll play that by ear. On a related note, two people just left our house today to make room for Noah: my parents. They drove out the next morning after I told them about Noah’s situation and had been here ever since providing emotional support, cooking, cleaning, and, critically, being there for Micah. We can’t thank them enough and we love them so much.

Now, if you’ll excuse me, I’m going to go hug both my boys at the same time. We love you all and over and out.

Terms in This Post

MRD (Measurable Residual Disease) Testing

A sensitive test that can detect cancer cells at very low levels (as few as 1 in 10,000 cells for AML). Used to determine if a patient is in remission. The threshold for remission is fewer than 5 abnormal cells per 10,000.

LP / Lumbar Puncture / Spinal Tap

A procedure where a needle is inserted into the lower spine to collect spinal fluid and deliver medication. Used to test for leukemia in the CNS (central nervous system) and to deliver chemotherapy directly into the spinal fluid as a preventative measure. Noah receives after each phase of the treatment.

ANC (Absolute Neutrophil Count)

A measure of neutrophils, the white blood cells that fight infection. Normal range is 1,500-8,000. Below 500 is considered severely neutropenic with high infection risk. After chemo, Noah's ANC drops to zero and we wait for it to recover, which can take weeks. Calculated as: WBC × (% neutrophils + % bands) / 100.

APC (Absolute Phagocyte Count)

A broader measure of immune cells that includes both neutrophils and monocytes. Doctors often want this above 300 before performing bone marrow tests. Calculated as: WBC × (% neutrophils + % bands + % monocytes) / 100.

AML (Acute Myeloid Leukemia)

The type of leukemia Noah has. It requires aggressive, in-patient chemotherapy treatment. AML is less common in children than ALL. Typically 4-6 months of intensive treatment — usually 4-5 cycles of inpatient chemotherapy, each requiring roughly a month in the hospital. Some patients then go to stem cell transplant, which adds more time and recovery.

Induction / Intensification

The phases of chemotherapy treatment. Noah's protocol includes 5 phases: Induction 1, Induction 2, Intensification 1, Intensification 2, and Intensification 3. Each phase involves days of chemo followed by weeks of count recovery in the hospital.

Bone Marrow Test / Biopsy

A procedure to collect bone marrow samples (both liquid and solid) from the hip area. Used to check the percentage of leukemia cells remaining and for MRD testing. Noah is under anesthesia for this procedure.

Bone Marrow Transplant

A potential treatment option if leukemia relapses. Requires a genetic match — siblings have a 25% chance of being a match. Mixed-race patients (like Noah, who is Asian/Caucasian) have more difficulty finding matches. Micah was confirmed as a full match for Noah.

Central Line

Two tubes surgically inserted into a large vein near the heart. Used for blood draws, IV fluids, transfusions, and chemo delivery. Makes treatment much easier than repeated needle sticks. The lines need to be flushed regularly with saline and heparin to prevent clotting.

Blast Cells

Immature blood cells that are normally found in small percentages in bone marrow (around 2%). In leukemia, blast cells stop maturing, replicate uncontrollably, and crowd out healthy blood cells. A high blast cell percentage is a key indicator of leukemia. Noah's was at 27-28% at diagnosis and 38% when tested a few days later.

Neutrophils

White blood cells that heal injuries and fight infection. They typically make up about 60% of white blood cells and are the primary component of the ANC.

Hemoglobin

The oxygen-carrying protein in red blood cells. Normal range is about 11-16. Noah was admitted with a critically low hemoglobin of 4.7 and receives red blood cell transfusions when it drops to 7 or below.

Monocytes

Another type of white blood cell, typically composing 2-8% of white blood cells. Monocytes are included in the APC calculation along with neutrophils. A rise in monocytes after chemo can sometimes be a precursor to neutrophils starting to recover.

Platelets

Blood cells that help with clotting. Normal range is 150-450. Noah receives platelet transfusions when counts drop below 20. Platelets have a short lifespan (9-12 days) and are often the first to drop and last to recover after chemo, but they've recovered more quickly than hemoglobin for Noah. After rounds 2 and 3 his platelets shot up to the top of the normal range.

Remission

When MRD testing shows fewer than 5 abnormal cells per 10,000. This does not mean zero cancer cells or that treatment is over — it means the leukemia is "currently" under control. Noah achieved remission after induction 1 with just 1 abnormal cell per 10,000 detected. None were detected after induction 2.

Comments (4)

Ben Wehrspann

Ben Wehrspann

David! I can feel the JOY in your words! I am so happy that your family is together again! I know it is just temporary but Im just living in the moment with you guys! So Happy! Hope you have a splendid weekend together! Love Ben and fam
Sarah Teske

Sarah Teske

Tears of joy here! So happy for your positive news. Enjoy your time together -- all the four of you! ♥️
Kathy Schutte

Kathy Schutte

Such wonderful news for Noah and your family! Prayers are working and will absolutely continue! Thank you so much for the update. More good news for me…I saw the light on next door last night and was hoping your parents were actually home! Enjoy your wonderful family.🙏🏼🙏🏼🙏🏼🙏🏼
Gloria Holderness

Gloria Holderness

To your whole family, we love you very much and are so happy that Noah is home and you are together. Prayers for his journey, we know you will all find strength together ❤️❤️❤️❤️.

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