When your child is too tall

Sometimes, being taller than your peers is a result of your genes and good nutrition; other times, it might be due to a medical condition. — The Star

Parents often beam with pride as their children grow, celebrating every inch and milestone.

But what if your child’s height begins to outpace their peers significantly?

While being tall is often a natural result of genetics and good health, an unexpected or rapid growth spurt might be a signal to dig deeper into their health.

In today's column, let’s explore what tall stature in children could mean and when you might need to consult a doctor.

Shooting up too fast

Every child grows at their own pace, influenced by a mix of their genetics, nutrition and hormones.

Children with tall parents are naturally more likely to be tall themselves.

However, when a child is having an unusual growth spurt, or if his or her height is significantly greater than their peers, or if neither parent is notably tall, it might be time to investigate further.

Growth is primarily controlled by hormones like growth hormone (produced by the pituitary gland), thyroid hormones and sex hormones.

Most tall children are simply a result of more rapid growth that occurs naturally.

However, in rare cases, being unusually tall could indicate an underlying condition.

Here are some potential causes of excessive growth:

> Family-linked height (familial tall stature)

If tall parents have tall children, it’s usually a matter of genetics.

As long as they are healthy, growing at a normal rate, and their height aligns with the height of their parents or other family members, there’s usually no cause for concern.

> Too much growth hormones (gigantism)

An overactive pituitary gland or a pituitary tumour can produce too much growth hormone, leading to gigantism.

This causes extreme height, along with other features such as enlarged hands, feet and facial bones.

While extremely rare, early diagnosis and treatment are crucial in such cases.

> Early-onset puberty (precocious puberty)

When puberty begins earlier than expected, children may grow taller than their peers initially, but often stop growing sooner, resulting in a final short height.

Early puberty in girls is defined as the development of breasts before the age of eight, or menses before the age of 10.

For boys, it is enlargement of the testes or genitalia before the age of nine.

Early puberty in boys is uncommon and must always be investigated urgently to rule out an underlying medical condition.

ALSO READ: When puberty strikes too early

> Hyperthyroidism

Conditions like hyperthyroidism (i.e. an overactive thyroid producing too much thyroid hormones) can accelerate growth initially, as well as cause early puberty.

Children with this condition may also experience symptoms such as restlessness, weight loss, intolerance to cold, or an increased heart rate.

ALSO READ: Thyroid problems can affect a child's growth and development

> Genetic syndromes

Certain genetic conditions, such as Marfan syndrome and Klinefelter syndrome, can lead to excessive height.

For instance, children with Marfan syndrome may have long arms, legs and fingers, as well as potential heart or joint problems.

Look out for these

As a parent, it’s essential to track your child’s growth and watch for signs that may indicate an issue.

Be alert if your child:

• Has a sudden or rapid growth spurt that seems unusual for their age.
• Experiences early puberty compared to their peers.
• Has disproportionately long arms, legs or fingers.
• Complains of joint pain, fatigue or difficulty with vision.
• Has noticeable differences in physical appearance, such as coarse facial features.

If you notice any of these signs, consult your child’s paediatrician or paediatric endocrinologist.

Paediatricians routinely use growth charts to monitor a child’s height and weight over time.

These charts compare your child’s growth to national averages for their age and gender.

If their height consistently falls above the 97th percentile, or above their expected height based on your and your spouse’s (i.e. parental) height, further evaluation may be recommended.

If your child’s doctor finds their growth pattern unusual, they might suggest the following steps:

• Assessing family and medical history – to understand your family’s height trends, as it can provide vital clues to the cause of your child’s height.
• Blood tests – to check for hormonal imbalances or genetic markers linked to growth disorders.
• Bone age assessment via an X-ray of the hand and wrist – to help determine whether your child’s bones are growing at an expected rate.
• Imaging tests like MRI (magnetic resonance imaging) – to examine the pituitary gland for a tumour if excess growth hormone is suspected.

Slowing the growth

While there are treatment options available for medical causes of excessive growth, the final choice depends on the cause of the problem, e.g.:

• Hormonal therapy – medications may be used to balance hormones and regulate growth.
• Management of genetic conditions – syndromes like Marfan syndrome often require multidisciplinary care to address related health concerns.
• Surgical intervention – surgery might be necessary for rare cases of a pituitary tumour or associated complications.

It is important for parents to remember that early detection and intervention are key to managing these conditions effectively.

While most adolescents like to be tall and height is seen as an advantage these days, being unusually tall can sometimes make a child feel different or self-conscious, especially among their peers.

Parents can play a vital role in helping their child embrace their uniqueness.

Encourage confidence and focus on their strengths, reminding them that height is just one aspect of who they are.

While height differences are often just part of a child’s natural growth journey, excessive height could sometimes point to a medical concern.

If you have any questions regarding your child’s height, do not hesitate to reach out to your paediatrician or paediatric endocrinologist.

Dr Jeanne Wong Sze Lyn is a consultant paediatrician and paediatric endocrinologist. For more information, email [e-mail]. The information provided is for educational purposes only and should not be considered as medical advice. The Star does not give any warranty on accuracy, completeness, functionality, usefulness or other assurances as to the content appearing in this column. The Star disclaims all responsibility for any losses, damage to property or personal injury suffered directly or indirectly from reliance on such information.