Recognizing Signs of Bone Tumors in Children
The short answer
Bone tumors in children are rare, especially before age 5. Signs include persistent bone pain (particularly at night or waking the child), a firm lump or swelling near a bone, limping without injury, and decreased use of a limb. Bone pain that worsens over time, occurs at rest, or wakes a child from sleep is different from normal growing pains and should be evaluated. Common benign bone conditions are far more likely than cancer.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
Bone tumors are extremely rare in infants. A bone-related lump or swelling in a baby is more likely a birth-related injury (clavicle fracture callus), infection (osteomyelitis), or benign bone cyst. Any unexplained bone swelling should be evaluated by your pediatrician.
Still very rare at this age. Persistent limping or refusal to bear weight that does not improve warrants X-ray evaluation. Most causes at this age are infections, fractures (including toddler fractures), or benign conditions.
Bone tumors remain uncommon. Persistent bone pain, especially at night, and unexplained limb swelling should be evaluated with imaging. Growing pains typically occur in both legs in the evening and resolve by morning, while bone tumor pain is usually in one location and progressive.
The risk of bone tumors increases slightly with age. Ewing sarcoma can occur in young children. Persistent, localized bone pain that worsens, a palpable mass near a bone, and limping that does not resolve should prompt evaluation including X-ray.
Bone tumors become more common in the adolescent growth spurt but can occur at any age. Osteosarcoma and Ewing sarcoma are the most common malignant bone tumors in children. Early diagnosis and treatment by a pediatric orthopedic oncologist lead to the best outcomes.
What Should You Do?
When to take action
- Growing pains that occur in both legs in the evening and are gone by morning
- Pain from an identifiable injury that improves with rest and healing
- A small bony bump that has been stable and evaluated by your pediatrician
- Your child has persistent bone pain in one location lasting more than 2 weeks
- You notice a firm lump near a bone that is growing
- Your child is limping without a clear injury and it is not improving
- Severe bone pain with a visible mass, especially with fever (possible osteomyelitis or tumor)
- Bone pain that wakes your child from sleep repeatedly, or a pathological fracture (breaking a bone with minimal force)
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
Recognizing Signs of Soft Tissue Tumors in Children
Rhabdomyosarcoma is the most common soft tissue tumor in children, typically occurring before age 6. It can develop anywhere in the body but commonly in the head/neck, urinary/reproductive tract, or limbs. Signs depend on location: a visible or palpable growing mass, eye bulging (orbital tumor), nasal obstruction or bloody discharge (nasal tumor), or urinary problems (pelvic tumor). With modern treatment including chemotherapy, surgery, and radiation, cure rates are improving.
Recognizing Signs of Leukemia in Children
Leukemia is the most common childhood cancer, but it is still rare. Warning signs include persistent unexplained fever, unusual pallor or fatigue, easy bruising or bleeding, bone or joint pain, swollen lymph nodes, enlarged abdomen (liver/spleen), frequent infections, and petechiae (tiny red dots on the skin). These symptoms are far more commonly caused by other conditions, but persistent symptoms with no clear explanation should be evaluated with a complete blood count.
When Should My Baby See a Pediatric Orthopedist?
A pediatric orthopedist specializes in bone, joint, and muscle conditions in growing children. Common reasons for referral include hip dysplasia, clubfoot, limb length differences, bowed legs beyond normal range, fractures, scoliosis, limping, and bone or joint abnormalities detected on examination or imaging. These specialists understand how growing bones and joints behave differently from adults.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.
Adenoid Hypertrophy and Breathing
Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.