“They Sent Us Home With Gastro”: Missed Appendicitis and When a Delay Is Negligence
Summary
Appendicitis is one of the most common reasons for emergency surgery, and one of the most commonly missed, especially in children. When it is missed, the appendix can burst and infection can spread. This guide explains the classic pattern with a diagram, why diagnosis can be hard, what should happen when appendicitis is possible, and when a missed appendicitis might be medical negligence.
Quick answer · updated November 2026
Appendicitis pain often starts near the belly button and moves to the lower right of the tummy. It can be hard to diagnose, especially in young children, so doctors rely on careful examination and often repeat it. If you were sent home without a plan to come back, and the appendix burst, you are entitled to ask why. For children, time limits don’t always wait until 18.
Appendicitis at a glance
- 1Early hoursVague pain near the belly button. Off food. Sometimes vomiting.
- 2Hours laterPain moves to the lower right and becomes constant.
- 3AssessmentExamination, blood tests, sometimes ultrasound or CT.
- 4Uncertain?You should leave with a clear plan to return or be reviewed.
- 5If it burstsInfection spreads. Surgery is bigger and recovery longer.
At any stage: severe tummy pain that gets worse when moving or touched, a child who is getting sicker, or pain with fever and vomiting: go to an emergency department. Call 000 if very unwell.
Lily was nine. On Saturday afternoon she said her tummy hurt, right in the middle, and didn’t want her party pie at her cousin’s birthday. By bedtime she’d vomited twice.
At emergency at 11 pm, the doctor pressed on her tummy for a minute while she lay curled on her side. “There’s a lot of gastro around. Keep her fluids up and she’ll be right in a day or two.” We went home with a sheet about dehydration.
On Sunday she wouldn’t walk. She shuffled bent over, holding her right side, and cried when the car went over a speed bump. I kept thinking about the sheet. Was I overreacting? They’d already seen her.
By Sunday night she was hot and quiet in a way she never is. I sat on the edge of her bed with my hand on her forehead and knew we had to go back.
A composite story, drawn from the experiences of many families I have worked with, combined and changed so that no one can be identified. It does not describe any individual client.
If you are reading this because appendicitis was missed for you or your child, I want you to know that going back was the right thing to do, and asking questions now is too. Appendicitis can be genuinely hard to diagnose. That is exactly why a careful plan matters when doctors aren’t sure.
This guide is for anyone affected by a delayed diagnosis of appendicitis, especially parents. It covers the typical pattern, why it can be missed, what should happen at assessment, the warning signs, what your records should show, and how the law looks at it.
Why I can write this
I have been a medical negligence lawyer since 2014 and have worked on many hundreds of claims, including many involving missed and delayed diagnosis. My doctorate looked at patterns of failure in medical negligence. I am not medically qualified. The clinical facts in this article are checked against named sources, listed in the references, and I explain how I work in our editorial standards.
Start with your question
- What are the signs of appendicitis?
- Why is appendicitis missed in children?
- How is appendicitis diagnosed?
- What should happen if the doctor isn’t sure?
- What happens if the appendix bursts?
- When should I go back to hospital?
- Is a missed appendicitis medical negligence?
The typical pattern
Appendicitis pain often starts near the belly button and may come and go. It then usually moves to the lower right side of the tummy, where it becomes more severe and more constant, and may hurt more with movement or coughing.1
Where appendicitis pain usually starts, and where it moves
The classic pattern
Drawn as if you are looking at the person facing you, so their right side is on your left.
- It often starts here. Vague pain around the belly button, with loss of appetite and sometimes vomiting.
- Then it moves here. Over hours, pain settles in the lower right, over the appendix, and gets sharper and more constant.
A simplified drawing. Not everyone follows this pattern, especially young children, pregnant people and older adults.
Definition
Appendicitis is inflammation and infection of the appendix, a small pouch attached to the large bowel. A perforated or ruptured appendix has burst, letting infection spread through the abdomen (peritonitis) or form a pocket of pus (an abscess).
In plain terms: the longer an inflamed appendix is left, the more likely it is to burst, and the bigger the operation and recovery.
Why it is missed, especially in children
Healthdirect notes that appendicitis can be hard to diagnose, especially in a young child, and that in adults it can be hard to tell apart from other conditions such as ectopic pregnancy, bowel infections and bowel obstruction. In young children, symptoms may be more subtle, particularly if the child can’t say where the pain is.12
Early appendicitis can look like gastro: tummy pain, vomiting, not wanting to eat. That overlap is one of the most common reasons it is missed. A 2021 study of children seen at five paediatric emergency departments in the United States found that delayed diagnosis was linked to longer hospital stays, more perforations and more operations, and estimated that about 23 per cent of delayed diagnoses were likely preventable.3
How it should be diagnosed
The main way a doctor diagnoses appendicitis is by listening to what has happened and examining the person. Ultrasound, CT scans and blood tests can help but don’t give a definite answer, so a person may need several examinations. Because appendicitis is potentially life-threatening if left untreated, doctors may operate even without a firm diagnosis.2
Questions to ask in emergency or at the GP
- Could this be appendicitis? What makes you think it is or isn’t?
- Should we wait here and be examined again in a few hours?
- Would a blood test or ultrasound help?
- Exactly what signs should make us come back, and how soon?
- Can you write the plan down for us?
When the doctor isn’t sure
Uncertainty is normal early on. What matters is what is done with it. Reasonable options include keeping you for observation and re-examining later, arranging tests, or sending you home with clear written advice about the warning signs and when to return, sometimes with a planned review the next day. A diagnosis of “gastro” without vomiting and diarrhoea together, or without any plan to check again, is worth asking about.
When to go back
A general guide only. If you are worried, go back.
Keep watching
- Mild tummy ache that is easing
- Eating and drinking a little
- Moving around normally
- Clear plan from the doctor
In plain terms: improving, and you know what to look for.
Go back today
- Pain moving to the lower right
- Pain worse when walking, coughing or in the car
- Still not eating, or vomiting continues
- A child who won’t walk upright
In plain terms: return to emergency and say you were seen before.
Emergency
- Severe pain when touched or moved
- Fever with tummy pain
- A child who is pale, floppy or unusually quiet
- A swollen, hard tummy
In plain terms: go now, or call 000.
For severe pain that worsens when you move or touch your tummy, healthdirect advises going straight to your local emergency department.1
If the appendix bursts
A swollen, infected appendix can burst, and infection may then spread through the abdomen.1 Surgery is then usually more complicated, with a longer hospital stay, often a longer course of antibiotics, sometimes drains, and a higher chance of complications such as abscesses. Children may miss weeks of school, and parents weeks of work.
If you felt brushed off, see when being dismissed by a doctor becomes a legal issue. For other missed conditions, see our guide to failed diagnosis.
The second doctor took one look at Lily walking in and sent her for an ultrasound. Her appendix had burst. She had surgery that night and spent eight days in hospital with a drain and antibiotics through a drip. I slept in the chair beside her, and her little brother stayed with my mum.
Later I asked for the records from the first visit. The triage note said “pain started central, now RIF”. Right iliac fossa: the lower right. The doctor’s note said “? gastro”, but there was no diarrhoea recorded. There was no plan to come back, just the dehydration sheet.
My husband read it twice. “It says lower right,” he said. “The nurse wrote it down. Right there.”
Lily is fine now. She shows her friends the scar. But I understand what happened that first night, and I don’t wonder anymore whether I overreacted.
A composite story, drawn from the experiences of many families I have worked with, combined and changed so that no one can be identified. It does not describe any individual client.
What to look for in the records
Your records are often where the story becomes clear. You have a right to access your own health information. In NSW the Health Records and Information Privacy Act 2002 covers both public and private providers, and the Information and Privacy Commission explains how to ask.4 Our step-by-step guide to getting your medical records in Australia walks you through it.
| Record | Why it matters |
|---|---|
| Triage notes | Often record the first description of the pain, including where it started and where it moved. |
| Emergency or GP notes | Show the examination, what was considered, and the reasoning for the diagnosis given. |
| Observations | Temperature, heart rate and other signs at each visit. |
| Blood test and imaging results | Show whether tests were done, what they showed, and when. |
| Discharge advice | Shows whether you were given a written plan with warning signs and when to return. |
| Operation and pathology reports | Confirm whether the appendix had burst and how much infection there was. |
| Your own diary, photos and messages | Notes made at the time are evidence too. Keep them. |
How the law looks at it
A missed appendicitis is not automatically negligence. It can be genuinely difficult to diagnose, and sometimes the signs simply aren’t there yet. The legal questions are whether the assessment and advice you received met the standard expected, and whether any delay caused harm.
A claim usually turns on three questions: whether the care fell below what peers would widely accept as competent practice (section 5O of the Civil Liability Act 2002 (NSW))5, whether that shortfall probably caused harm you wouldn't otherwise have had (Tabet v Gett)6, and, where it matters, whether you were told the material risks first (Rogers v Whitaker)78. Our guide to how a medical negligence claim works explains each one in plain terms.
In an appendicitis case, the questions might be: was appendicitis considered? Was the history taken properly, including where the pain started and moved? Was the examination adequate? Given any uncertainty, was a reasonable plan made, such as observation, tests, or clear advice to return?
In plain terms, the question is whether earlier diagnosis would probably have meant surgery before the appendix burst, and so a smaller operation and quicker recovery.
For a missed diagnosis, consent is less often the issue. But you should have been given the information you needed to decide when to come back.
Who can claim, and when
The person affected can claim. For a child, a parent or guardian usually brings the claim on their behalf, and time limits for children don’t always wait until they turn 18. In NSW, time usually runs from when you knew, or ought to have known, enough to claim, not from the treatment itself, and courts can sometimes extend it, so an old injury may still count. See time limits in NSW or other states, and ask early.
More: complaint or claim? · how a claim is paid for · what a claim can cover
In my practice
In the missed appendicitis files I see, the clue is very often written in the notes. A triage nurse records that the pain moved to the lower right. A child is noted to be walking bent over. Then a diagnosis of gastro is made without the diarrhoea that would usually go with it, and the family goes home with a dehydration sheet and no plan to return. It is a chain of small things, made late at night in a busy department. What strikes me is how often parents doubt themselves afterwards, because they were told it was nothing. Going back was the right decision. The question is why they had to make it alone.
Both things can be true
The emergency doctor may have been working through a packed waiting room and doing their best, and your child’s appendicitis may still have deserved a closer look. Appendicitis may be hard to diagnose, and the signs may still have been in front of them. You can be grateful to the team who operated and still want to know why the first visit went the way it did.
The bigger picture
Delayed diagnosis of appendicitis is studied closely because it is common and the consequences are significant. Research in children suggests that a meaningful share of delays are preventable.3 Healthdirect advises anyone who may have appendicitis to see a doctor as soon as possible.1
You can check any practitioner’s registration on the Ahpra public register,9 and complaints about care in NSW can go to the Health Care Complaints Commission.10 If complications followed surgery, see bowel injury during surgery and our page on surgical errors and hospital negligence.
Support
You don't have to work through this alone. These services can help:
- Lifeline, 24-hour crisis support: 13 11 14 (listed on healthdirect's helplines page)11
- Beyond Blue, anxiety and depression support: 1300 22 4636
- Medicare Mental Health, help finding mental health support: 1800 595 212
- healthdirect, 24-hour nurse advice: 1800 022 222
- Health Care Complaints Commission (NSW): 1800 043 159
A mother who sat on the edge of her daughter’s bed and decided to go back now knows she was right. You deserve that certainty too.
With care,
Rosemary
Frequently asked questions
Is a missed appendicitis medical negligence?
It can be, if appendicitis should reasonably have been considered and acted on, and the delay caused harm such as a burst appendix.
Why is appendicitis missed in children?
Early symptoms can look like gastro, and young children may not be able to say where it hurts.
How is appendicitis diagnosed?
Mainly by history and examination, sometimes repeated, with blood tests, ultrasound or CT to help.
What happens if the appendix bursts?
Infection can spread through the abdomen. Surgery is bigger and recovery is longer.
How long does a child have to make a claim?
Time limits for children in NSW don’t always wait until they turn 18. Get advice early.
What should I do if I was told it was gastro but the pain is worse?
Go back to emergency and tell them you were seen before and what has changed.
Questions about a missed appendicitis?
When you're ready, and not before, I can look at what happened and help you understand your options.
Missed and delayed diagnosis guides
- “They sent us home with gastro”: Missed appendicitis (you are here)
- “They said it was a pulled muscle”: Missed blood clots (DVT and PE)
- Failed diagnosis: when a missed diagnosis causes harm
- Cauda equina misdiagnosis: when back pain red flags are missed
- Misdiagnosed UTI: when a delayed diagnosis leads to kidney damage
- Sepsis and leg removal: when is that medical negligence?
Part of our guide to missed and delayed diagnosis. Not sure where you stand? Try the free claim checker.
References
- healthdirect Australia. Appendicitis symptoms.
- healthdirect Australia. Appendicitis diagnosis.
- Michelson KA, Reeves SD, Grubenhoff JA, et al. Clinical features and preventability of delayed diagnosis of pediatric appendicitis. JAMA Netw Open. 2021;4(8):e2122248. Summary: AHRQ Patient Safety Network.
- Information and Privacy Commission NSW. Fact sheet: Accessing your health information in NSW.
- Civil Liability Act 2002 (NSW) s 5O, Standard of care for professionals.
- Tabet v Gett [2010] HCA 12.
- Rogers v Whitaker [1992] HCA 58; (1992) 175 CLR 479.
- Australian Commission on Safety and Quality in Health Care. Informed consent.
- Australian Health Practitioner Regulation Agency. Register of practitioners.
- Health Care Complaints Commission NSW. Home page.
- healthdirect Australia. Mental health helplines.
Stories in this article are composites, drawn from the experiences of many families I have worked with, combined and changed so that no one can be identified. They do not describe any individual client.
Dr Rosemary Listing, PhD (Law), Medical negligence lawyer since 2014 · Of Counsel, Peter Evans & Associates. Rosemary's doctorate examined patterns of failure in medical negligence, and she teaches health law at the University of Newcastle. She is not medically qualified. About Rosemary.
Last updated: 10 November 2026 · First published: 10 November 2026 · Next review: May 2027
Cite this article: Listing R. “They sent us home with gastro”: Missed appendicitis and when a delay is negligence. Reframe Legal. Published 10 November 2026. https://reframelegal.com/missed-appendicitis/
This article is general information, not legal or medical advice. It does not create a lawyer–client relationship. Speak to your treating clinicians about your health, and get legal advice about your own situation.
If you are in danger or need urgent medical help, call 000. For crisis support, call Lifeline on 13 11 14.
Legal services are provided by Peter Evans & Associates.