growth specialist tests overview

Overview

Growth specialist tests are a group of medical tests used to check if a child or adult is growing normally. They help doctors understand why someone might be much shorter or taller than expected, or growing at a different rate than usual. These tests look at things like growth hormone levels, bone age, and other factors that control growth.

Growth concerns are fairly common in childhood, but needing a full set of growth specialist tests is less common. Most children who are short or tall are simply following their own natural growth pattern, and only a small number need further testing.

Growth tests are most often done in children, especially those whose height or growth rate is far from what is expected for their age and family background. They can also be done in adults who may have problems related to growth hormone, like low bone density or changes in body composition.

Symptoms

Common symptoms

• Being much shorter or taller than other children the same age
• Growing much slower or faster than expected for age
• Not having a growth spurt at the usual time during puberty
• Having a family history of growth problems

Symptoms in children

• Height below the 3rd percentile or above the 97th percentile for age
• Crossing percentiles on the growth chart (e.g., dropping from 50th to 10th)
• Late or early puberty
• Delayed bone age compared to chronological age

Symptoms in older adults

• Unexplained weight gain or loss
• Loss of muscle mass or bone density
• Fatigue and low energy
• Changes in body shape, such as increased belly fat

Causes

Main causes

• Growth hormone deficiency (too little growth hormone from the pituitary gland)
• Growth hormone excess (too much growth hormone, often from a benign tumor called an adenoma)
• Genetic conditions like Turner syndrome or Noonan syndrome
• Chronic illnesses that affect growth, such as kidney disease, celiac disease, or severe asthma
• Thyroid hormone problems (hypothyroidism or hyperthyroidism)
• Malnutrition or malabsorption issues

Risk factors

• Family history of growth disorders
• Low birth weight or being born small for gestational age
• Certain medical treatments, like radiation therapy to the head
• Chronic health conditions that affect nutrition or absorption

When to see a doctor

See a doctor urgently if:

• Your child has suddenly stopped growing or is losing weight
• You notice rapid, unexplained growth over weeks or months
• Your child has severe headaches with vision problems

Book a routine appointment if:

• Your child’s height or growth rate worries you
• You have been told your child is below the 3rd or above the 97th percentile on the growth chart
• Puberty either starts very early (before age 8 in girls, before age 9 in boys) or is delayed (no signs by age 14)

Diagnosis

A growth specialist will start by taking a detailed history and doing a physical exam. They will plot your child’s height, weight, and head circumference on a growth chart. Based on that, they may suggest one or more of the tests below to find the cause.

Tests that may be done

• Blood tests: to measure levels of growth hormone (GH), insulin-like growth factor-1 (IGF-1), thyroid hormones, and other hormones
• GH stimulation test: blood is taken before and after taking a special drink or medicine that normally triggers growth hormone release to see if the body responds correctly
• Bone age X-ray: an X-ray of the left hand and wrist to compare bone maturity to age
• IGF-1 generation test: measures how well the body produces IGF-1 in response to growth hormone
• MRI scan of the brain: to look at the pituitary gland and hypothalamus for tumors or other problems
• Genetic testing: if a syndrome is suspected, blood or saliva can be tested for specific genes

What to expect at your appointment

Most of these tests are done as an outpatient, meaning you don’t need to stay in the hospital overnight. Blood tests are similar to any other blood draw. The GH stimulation test may take a few hours because several blood samples are needed over time. The bone age X-ray is quick and painless. The doctor will explain each test beforehand and answer any questions.

Treatment

Treatment depends on the cause of the growth problem. If a deficiency is found, treatment often involves replacing the missing hormone. If there is a genetic or chronic condition, that condition will be treated directly. The goal is to help the person reach a normal height and support overall health.

Self-care at home

• Make sure your child eats a balanced diet with enough protein, vitamins, and minerals
• Encourage regular physical activity, which supports growth and bone health
• Ensure good sleep, as growth hormone is mostly released during deep sleep
• Keep track of your child’s height and weight at regular checkups

Medical treatments

If growth hormone deficiency is confirmed, treatment usually involves regular injections of synthetic growth hormone. This is given every day, often for several years, and is monitored closely by a specialist. For other causes, treatment may include thyroid hormone replacement, medications for chronic illness, or, rarely, surgery to remove a tumor. Your doctor will discuss all options with you.

When is surgery considered?

Surgery is rarely needed for growth disorders. It may be considered if a pituitary tumor is causing excess growth hormone or if there is a structural problem in the brain. This would be done by a neurosurgeon in a specialist hospital.

Living with this condition

For most people, growth disorders are managed with regular visits to a growth specialist. You or your child may need to take medicines or injections at home. Keeping a growth diary and attending all appointments helps track progress.

Lifestyle tips

• Build a supportive routine around any daily treatments
• Communicate openly with your child about their condition in an age-appropriate way
• Connect with other families going through similar experiences
• Focus on strengths and talents, not just height

Diet and exercise

A balanced diet rich in calcium, vitamin D, and protein supports bone health and growth. Regular exercise, especially weight-bearing activities like walking or jumping, helps build strong bones. Aim for at least 60 minutes of activity a day for children.

Mental health and emotional wellbeing

Being very short or tall can affect self-esteem, especially in children and teens. Teasing or bullying may occur. It is important to talk about these feelings and consider speaking with a counselor or support group. Many people with growth issues live happy, fulfilling lives.

Prevention

Most growth disorders cannot be prevented because they are caused by genetics or other health conditions. However, early detection and treatment can help prevent some complications and improve overall growth.

Vaccines

This does not apply directly. Ensure your child receives all routine vaccinations to prevent illnesses that could affect growth.

Screening programmes

Routine growth monitoring at well-child visits is the best screening tool. Your doctor will plot your child’s height and weight on a growth chart at every checkup. There is no routine screening test for growth hormone problems in the general population.

Complications

If left untreated

• Persistent short stature or excessive tall stature
• Delayed or incomplete puberty
• Reduced bone density and increased fracture risk
• Metabolic issues such as high cholesterol or insulin resistance (with growth hormone deficiency)
• Vision problems or headaches (if a pituitary tumor is present)

Long-term outlook

With proper diagnosis and treatment, most growth disorders can be managed well. Children often reach a normal adult height appropriate for their family. Treatment may continue into adulthood, but many people live full, healthy lives. Early treatment gives the best chance for good outcomes.

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