The milestone chart on the wall of the paediatric clinic showed a smiling baby sitting up at six months. Rolling over at four. Walking by twelve to fourteen.
My son was eighteen months old and still could not sit without support.
I had stopped looking at those charts.
What nobody told us when we left the hospital after my son’s hydrocephalus diagnosis — not the neurologist, not the discharge nurse, not the printed information sheet — was that developmental delays are not a failure of treatment. They are not a sign that something went wrong in the surgery or the rehabilitation. They are, in many cases, simply what hydrocephalus does. The condition affects the brain during a period when the brain is doing the most critical work of a child’s life. Some of that work gets disrupted. Some of it catches up. Some of it takes much longer than any chart predicts.
This article is for every parent standing in a clinic with a milestone chart on the wall, trying to understand the gap between what it shows and what they see in their child.
What Developmental Delays Actually Mean in Hydrocephalus
A developmental delay is not a ceiling. It is a timeline that looks different from what is considered typical.
In children with hydrocephalus, delays can affect any of the following areas — often in combination:
Gross motor skills — sitting, standing, walking, balance and coordination. These are commonly affected when hydrocephalus has caused pressure on the motor cortex or when a child has experienced muscle weakness as a result of the illness.
Fine motor skills — using hands and fingers for precise tasks. Holding a pencil, doing up buttons, using cutlery. If one side of the body was more affected than the other — as was the case with my son’s left side — fine motor delays on that side may persist longer.
Speech and language — some children with hydrocephalus develop what is sometimes called “cocktail party speech” — fluent, sociable-sounding language that does not always reflect genuine comprehension. Others have genuine expressive or receptive language delays.
Cognitive development — memory, attention, processing speed, problem-solving. These can be subtle and are often not identified until a child starts school.
Social and emotional development — sometimes secondary to other delays. A child who cannot communicate effectively or who has spent significant time in medical settings may develop social anxieties or emotional regulation difficulties.
Why Hydrocephalus Causes Delays
The brain is not a static organ. In the first three years of life it forms approximately one million new neural connections every second. Hydrocephalus — and the elevated intracranial pressure that comes with it — disrupts this process.
The periventricular white matter, which surrounds the ventricles where CSF accumulates, is particularly vulnerable. This white matter carries signals between different brain regions. When it is compressed or damaged by excess fluid, those signals travel less efficiently.
A 2022 study published in Developmental Medicine and Child Neurology found that children with hydrocephalus showed significantly higher rates of motor and cognitive delays compared to matched controls — regardless of whether they had been treated with a VP shunt or endoscopic third ventriculostomy. The delays were related not primarily to the treatment type, but to the timing and extent of the pressure before treatment.
In other words: earlier diagnosis and treatment consistently produces better developmental outcomes. Which is one of the reasons delayed diagnosis — like the twenty-eight days my son went undiagnosed — carries real consequences beyond the acute illness itself.
The Honest Truth About Catching Up
Here is what research shows, and what lived experience confirms: many children with hydrocephalus do make significant developmental progress, often far beyond what early assessments predicted. The brain’s capacity for reorganisation — neuroplasticity — is genuinely remarkable, especially in young children.
But “catching up” does not always mean catching the milestone chart. For some children it means developing skills on a different timeline. For others it means finding alternative pathways to the same destination. For others still, some gaps remain — not as failures, but as the honest footprint of what the brain went through.
My son cannot yet run the way his peers can. His left hand still works differently from his right. But he draws. He communicates. He makes people laugh. He is learning, every day, on his own timeline.
The question worth asking is not “will my child catch up?” The better question is: “what does my child need right now to take the next step?”
What Actually Helps — The Evidence
Early intervention is the single most important factor.
Speech therapy, occupational therapy, and physiotherapy started early and maintained consistently produce better outcomes than therapy started later. This is not opinion — it is one of the most consistent findings across developmental paediatrics research.
If your child has not yet been referred to early intervention services, ask your neurologist or paediatrician directly. Use these exact words: “I would like a referral to early intervention for developmental assessment.”
Therapy works best when it continues at home.
The work done in a thirty-minute therapy session is meaningful. The work done in the hours between sessions — the exercises, the play activities, the repetition — is what drives actual change. Therapists are guides. Parents are the daily practitioners.
Consistency matters more than intensity.
Small amounts of targeted activity every day outperform irregular intensive sessions. Ten minutes of hand exercises each morning, sustained over six months, produces more change than occasional hospital appointments.
Sleep is not optional.
During sleep, the brain consolidates learning. Children with developmental delays who are not sleeping adequately make slower progress in therapy. Protecting sleep quality is as important as the therapy itself.
Questions to Ask Your Development Team
At your next appointment, bring these questions:
- Which developmental domains are most affected in my child specifically?
- What does the assessment show about my child’s strengths — not just the delays?
- What therapy services should my child be receiving and how frequently?
- What can I do at home between sessions that will make the biggest difference?
- What should I expect in the next six months, realistically?
- At what point would you reassess and adjust the plan?
A Note on School
Developmental delays related to hydrocephalus do not disappear when a child starts school. They often become more visible — because school demands things of children that home environments do not.
If your child is approaching school age, begin conversations with your local school now. Ask about Individual Education Plans, learning support teachers, and what accommodations are available. The earlier these conversations happen, the better the school can prepare.
We will cover this topic in much more detail in our article on talking to schools about hydrocephalus.
For the Parent Reading This Tonight
The milestone chart does not account for what your child has been through. It does not account for the surgery, the hospitalisation, the weeks of fever, the medication, the rehabilitation. It is a tool designed for typical development. Your child’s development is not typical — it is remarkable, given everything their brain has already survived.
Progress may be slower than you hoped. It may look different than you expected. But it is happening. Every day your child is doing something the research said might not be possible.
Keep the appointments. Do the exercises. Ask the hard questions. And give yourself permission to measure progress against where your child was last month — not against a chart that was never designed for them.
This article is written for informational purposes and does not constitute medical advice. Always consult your child’s neurologist, developmental paediatrician, and therapy team for guidance specific to your child’s situation. Read our full medical disclaimer at braincarepath.com/disclaimer/
Bibliography
- Lindquist B, Persson EK, Uvebrant P, Carlsson G. Learning disabilities and the development of hydrocephalus. Developmental Medicine and Child Neurology. 2008;50(8):598-601.
- Paulsen AH, Lundar T, Lindegaard KF. Pediatric hydrocephalus: 40-year outcomes in 128 hydrocephalic patients treated with shunts during childhood. Journal of Neurosurgery: Pediatrics. 2015;16(6):633-641.
- Fletcher JM, Dennis M, Northrup H. Hydrocephalus. In: Pediatric Neuropsychology. 2nd ed. Guilford Press; 2010.