Yes, some newborns are diagnosed with cancer, though it is rare, and neuroblastoma is the type doctors see most often at birth.
Cancer in a newborn is rare, but it can happen. Doctors do see babies who are born with a tumor or who are diagnosed in the first days or weeks of life.
A cancer may be found before birth on an ultrasound, or only after delivery when a lump, swollen belly, skin nodules, odd blood counts, or breathing trouble leads to more testing. The most common cancer found in newborns is neuroblastoma, though a few other tumors can also show up at birth or soon after.
What “Born With Cancer” Usually Means
Doctors often use terms such as congenital cancer or neonatal cancer. In plain language, they mean a cancer that is present at birth or found during the first month of life. That timing matters, because tumors in newborns can act differently from cancers seen in older children.
Some are found on prenatal scans. Others turn up only after delivery, when the baby is examined more closely. Not every newborn mass is cancer, so doctors sort this out with imaging, blood work, and, when needed, a biopsy.
Which Cancers Can Show Up At Birth Or Soon After
Dana-Farber’s overview of newborn cancer notes that neuroblastoma is the type doctors see most often in newborns. It grows from immature nerve cells and may appear near the adrenal gland, spine, or abdomen.
Leukemia can also be present at birth, though it is rare. Since leukemia starts in blood-forming cells, there may be no single lump to feel. Doctors may instead see pale skin, bruising, poor feeding, or blood test results that do not fit the normal newborn pattern.
Another tumor doctors know well in this age group is sacrococcygeal teratoma, which forms near the tailbone. Many teratomas are not cancerous, though some contain malignant tissue or can turn aggressive.
A few babies are also diagnosed with liver tumors, kidney tumors, or soft tissue tumors in early infancy. The list is short, but it is broad enough that doctors do not jump to one answer from one sign alone.
What Doctors Notice First
Newborn cancers are often found because something looks off instead of because a baby seems sick in a classic way. A few of the first clues can include:
- A firm lump in the belly, back, or near the tailbone
- An abdomen that looks swollen or tight
- Skin nodules or blue-purple spots
- Breathing trouble caused by a large mass
- Paleness, bruising, or unusual bleeding
- Poor feeding or low energy
- An enlarged liver seen on exam or scan
- Blood counts outside the expected newborn range
None of those signs proves cancer on its own. They tell the medical team that the baby needs a fuller workup.
When Babies Are Born With Cancer And How Doctors Sort It Out
The first step is usually imaging. If the mass was seen during pregnancy, the team may already have ultrasound or fetal MRI results. After birth, doctors often repeat imaging so they can map the size of the tumor, see where it started, and check whether it has spread.
Then come blood tests and a careful physical exam. The team may check blood counts, liver function, kidney function, and tumor markers, depending on the suspected cancer. If the picture still is not clear, a biopsy may be needed.
The goal is not just to name the cancer. Doctors also need to learn how active it is and whether the baby is stable enough for surgery, chemotherapy, or another plan. The National Cancer Institute’s childhood cancer page lists the main treatment tools used in children, including surgery, chemotherapy, radiation therapy, immunotherapy, and stem cell transplant.
| Type Or Pattern | How It May Show Up | What Doctors Need To Clarify |
|---|---|---|
| Neuroblastoma | Abdominal mass, enlarged liver, skin spots | Site of origin, spread, tumor biology |
| Congenital leukemia | Paleness, bruising, odd blood counts, enlarged liver or spleen | Blood cell type, genetic changes, urgency of treatment |
| Sacrococcygeal teratoma | Mass near the tailbone | Whether the mass is benign, mixed, or malignant |
| Liver tumor | Swollen abdomen, poor feeding, abnormal labs | Tumor type, liver function, spread |
| Kidney tumor | Abdominal fullness or lump | Exact diagnosis and surgical plan |
| Soft tissue tumor | Visible or deep mass | Location, tissue type, relation to nearby structures |
| Benign tumor that mimics cancer | Mass on scan or exam | Whether biopsy or surgery is needed to confirm |
| Cancer found before birth | Seen on prenatal ultrasound or fetal MRI | Delivery timing, specialist team, immediate newborn care |
What Causes It And What Does Not
This is the part many parents go straight to: “Did I do something wrong?” In most cases, the answer is no. Childhood cancers are not usually tied to one choice, one meal, or one ordinary event during pregnancy.
NCI’s genetics of cancer explainer says cancer starts with DNA changes that alter how cells grow and divide. Those changes can be inherited, but they can also arise from random errors as cells copy themselves. Since fetal growth involves rapid cell division, a cancer can, in rare cases, start before birth.
Many newborn cancers appear without any family history at all. Some babies do have an inherited cancer predisposition syndrome, and that can shape care for the child and the rest of the family. Doctors may suggest genetic testing when the tumor type or family history points in that direction.
Why These Cases Can Be Hard To Spot
Newborns cannot describe pain. Many early signs of cancer overlap with more common newborn problems. A swollen belly might be blamed on feeding issues. Pale skin might look like anemia. Bruising may raise a long list of non-cancer causes.
Some newborn tumors are found before they cause any outward sign at all. A routine prenatal scan can pick up a mass long before a baby appears unwell, which gives the team time to plan the delivery and line up the right specialists.
| Next Step | Why It Is Done | What Parents May Hear |
|---|---|---|
| Repeat imaging after birth | To confirm size, site, and spread | Ultrasound, MRI, or CT may be ordered |
| Blood tests | To check counts, organ function, and markers | Some results point to one tumor type more than another |
| Biopsy or surgery | To identify the tissue and confirm diagnosis | The team may wait until the baby is stable enough |
| Pathology and genetic testing | To learn how the tumor behaves | Results can shape the treatment plan |
| Pediatric cancer center referral | To match the baby with a team used to rare tumors | Care may involve several specialists at once |
How Treatment Usually Works In Newborns
Treatment depends on the tumor type, where it sits, whether it has spread, and how stable the baby is. Some newborns go to surgery first. Others need chemotherapy first so the mass shrinks before an operation is safer.
Doctors also weigh the fact that newborns are tiny and still adjusting to life outside the womb. Doses, timing, fluids, and anesthesia all need extra care. That is one reason these cases are often managed at children’s hospitals with pediatric oncology, surgery, neonatal intensive care, radiology, and pathology working side by side.
Outlook can range widely. Some newborn cancers respond well to treatment. Others are harder to treat and need long hospital stays. The diagnosis alone does not tell the whole story; the exact tumor biology matters a lot.
What Parents Can Take From This
If you are asking this after a scan, a blood test, or a new diagnosis, the blunt answer is yes: babies can be born with cancer. The softer part of the answer is that it is rare, doctors know the patterns, and the next steps usually become clearer once imaging, blood work, and pathology are in hand.
A few steadying points may help:
- Rare does not mean unheard of
- A mass at birth is not always cancer
- Many cases are not tied to anything a parent did
- The exact tumor type matters more than the word “cancer” alone
- Newborn cases are best handled by pediatric specialists
If a doctor has raised this question for your baby, getting clear answers fast matters more than chasing guesses online. Ask what has been found, what still needs to be confirmed, and when the full team will review the results. Those three questions can cut through a lot of fear.
References & Sources
- Dana-Farber Cancer Institute.“Can Babies Be Born with Cancer?”Explains that newborn cancer is rare and names neuroblastoma as the type seen most often at birth.
- National Cancer Institute.“Childhood Cancers.”Lists major treatment methods used in children and outlines how childhood cancers are diagnosed and treated.
- National Cancer Institute.“The Genetics of Cancer.”Explains how DNA changes can cause cancer and notes that some cancer-related changes can happen before birth.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.