Senior Consultant, Pediatric Hemato-Oncology and Bone Marrow Transplant, Artemis Hospitals, Gurugram, India
Part 2 of 11 in Childhood Cancer: The Journey from Despair to Durable Survival
When to Suspect Cancer in a Child: Warning Signs by Organ System
August 27, 2026
General pediatricians and family physicians ask Dr. Danewa the same question repeatedly: is there a specific sign that separates childhood cancer from an ordinary childhood illness? His answer is direct. There is none. A prolonged fever can mean infection, or it can mean leukemia or lymphoma. Enlarged lymph nodes can follow a viral infection, or they can signal malignancy. Nothing on its own points reliably to cancer.
Persistence and combination matter more than any single sign
Because no symptom belongs exclusively to cancer, vigilance has to substitute for a checklist. What should raise suspicion is a symptom that persists longer than expected, grows more intense than routine treatment would explain, or appears in combination with other signs, especially when a clear diagnosis has not been reached through the usual course of care.
Reading the child from head to toe
Dr. Danewa walks through the warning signs by organ system. Early morning headaches paired with projectile vomiting point to raised intracranial pressure and a possible brain tumor. A white reflex seen in a photograph, known as leukokoria, can be an early sign of retinoblastoma. Painless, matted lymph nodes in the neck often suggest lymphoma, distinct from the tender nodes typical of infection. Engorged veins in the neck can indicate a mass in the chest compressing venous return to the heart. In the abdomen, a tumor arising from the adrenal gland is neuroblastoma, while one arising from the kidney is Wilms tumor. Bone pain that starts gradually, often at night, and continues for weeks rather than days can point to osteosarcoma or Ewing sarcoma.
When the bone marrow itself is the problem
Leukemia presents differently because it crowds out the bone marrow's normal function rather than forming a single mass. The result is a cluster of signs appearing together: recurrent fever from a shortage of infection-fighting white cells, unexplained bruising or bleeding spots from low platelets, and pallor from low hemoglobin. Seeing this combination, rather than any one symptom in isolation, is what should prompt a complete blood count and, if warranted, a bone marrow examination.
None of these signs confirm a diagnosis by themselves. What they do is tell a physician where to look next, combining clinical history, physical examination and targeted screening tests to reach a diagnosis early enough to plan staging and treatment properly.
This guide is based on a live Jivo Masterclass — Dr. Arun Singh Danewa taught doctors across Africa on March 8, 2026.
FROM THE LIVE Q&A
Dr. Sunday Ucha
Can you recommend a textbook on pediatric cancers that doctors can follow?
Dr. Arun Singh Danewa
Dr. Danewa recommended Nathan and Oski's Hematology and Oncology of Infancy and Childhood as the primary reference, alongside Lanzkowsky's Manual of Pediatric Hematology and Oncology, and offered to share his own treatment protocols and presentations directly with any doctor who requests them.
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Frequently Asked Questions
Is targeted therapy readily available, and what does it cost?▼
For relapsed ALL, inotuzumab and blinatumomab are both available. Inotuzumab is the more affordable option since it only requires day-care admission, roughly 10,000 to 12,000 US dollars per cycle (day 1, 8 and 15), and some manufacturers offer buy-one-get-one support schemes. Blinatumomab is costlier, at 30 to 40 lakh Indian rupees, because it requires 28 days of hospitalization with continuous infusion, so it is used far less often for international patients. Anti-GD2 therapy (dinutuximab) for neuroblastoma runs around 70 to 80 lakh rupees, though the price has been coming down.
In US dollar terms, what is a rough ballpark for what families should expect these targeted therapies to cost?▼
Dr. Danewa put inotuzumab at roughly 10,000 to 12,000 US dollars per cycle, noted that the 70 to 80 lakh rupee cost of dinutuximab converts to about 80,000 US dollars, and priced brentuximab plus nivolumab immunotherapy for Hodgkin lymphoma in a similar range to inotuzumab, around 12,000 to 15,000 US dollars.
Can you briefly touch on the role of stem cell transplant in pediatric care?▼
Dr. Danewa explained that upfront bone marrow transplant has no role in most pediatric leukemia. It is reserved for cases without morphological remission (blasts above 10% at the end of induction), for hypodiploidy (fewer than 44 chromosomes), or for relapse. For benign conditions, the leading indication, especially in Africa, is sickle cell disease, where earlier transplant, ideally before age 12 and before pain crises, stroke or chest syndrome accumulate, gives a better outcome. He described three transplant types: matched sibling, matched unrelated donor via registry, and haploidentical transplant from a parent, with haploidentical success running around 70 to 80% depending on the underlying disease.
Other than cancer, do you offer bone marrow transplant for disorders like sickle cell disease, and is there a cure?▼
Yes. Dr. Danewa confirmed bone marrow transplant is a cure for sickle cell disease, and that outcomes are best the earlier it is done, since delay allows organ damage and comorbidities to accumulate and lowers the chance of success.
How effective is CAR T-cell therapy?▼
In relapsed or refractory leukemia, where prior treatment options offered only a 5 to 10% chance of success, both Western data and four to five years of follow-up on India's own indigenous CAR T-cell programs are now showing 50 to 60% success.
Is there a single symptom that reliably signals childhood cancer?▼
No. Prolonged fever, enlarged lymph nodes and other common signs can just as easily point to an ordinary childhood illness. What should raise suspicion is a symptom that persists longer than expected, grows more intense than routine treatment would explain, or appears in combination with other signs without a clear diagnosis.
What does a white reflex in a child's photograph indicate?▼
A white reflex seen in a photograph, known as leukokoria, can be an early sign of retinoblastoma.
What combination of symptoms should prompt a blood count for suspected leukemia?▼
Leukemia crowds out the bone marrow's normal function rather than forming a single mass, producing a cluster of signs together: recurrent fever from a shortage of infection-fighting white cells, unexplained bruising or bleeding spots from low platelets, and pallor from low hemoglobin. That combination, rather than any one sign alone, should prompt a complete blood count and, if warranted, a bone marrow examination.
What do early morning headaches with vomiting suggest in a child?▼
Early morning headaches paired with projectile vomiting point to raised intracranial pressure and a possible brain tumor.
How can a lymph node caused by infection be distinguished from one caused by lymphoma?▼
Painless, matted lymph nodes in the neck often suggest lymphoma, distinct from the tender nodes typical of infection.
In This Series: Childhood Cancer: The Journey from Despair to Durable Survival
- 1.Childhood Cancer
- 2.When to Suspect Cancer in a Child: Warning Signs by Organ System
- 3.Acute Lymphoblastic Leukemia: The 70-Year Climb from 20% to 90% Survival
- 4.Acute Myeloid and Chronic Myeloid Leukemia in Children
- 5.Brain Tumors in Children: Survival, DIPG and the Rise of Liquid Biopsy
- 6.Neuroblastoma and Wilms Tumor: Treating the Two Most Common Abdominal Cancers in Children
- 7.Osteosarcoma and Ewing Sarcoma: Choosing Limb Salvage Over Amputation
- 8.CAR T-Cell Therapy in Childhood Leukemia: How It Works and Where It Is Headed
- 9.Bone Marrow Transplant in Children: Relapsed Leukemia and Sickle Cell Disease
- 10.The Real Cost of Childhood Cancer Treatment: Targeted Therapy Prices Explained
- 11.How India and Africa Can Collaborate on Childhood Cancer Care