Childhood Cancer Misdiagnosed as a Virus

Written by Tanya Waterworth, Digital Content Writer

About Our Legal Expert: This content is produced with oversight by Michael Jefferies, Managing Director who has over 30 years’ legal experience.

Clinical Negligence Claims for Delayed Paediatric Cancer Diagnosis

Childhood cancer is rare which is why early symptoms may be missed, but childhood cancer misdiagnosed as a virus can have serious consequences. As a parent, it’s likely you’ll feel somethings not right but may have been told your child ‘just has a virus’.

However, if symptoms continue and are not escalated for further investigation which delays a correct diagnosis, parents may want to file a clinical negligence claim.

In England and Wales, we see a pattern in clinical negligence claims involving childhood cancers. Essentially, symptoms which should have triggered urgent action may have been instead put down to a common viral infection – delaying diagnosis and treatment.

Why Childhood Cancers Are So Often Mistaken for Viral Infections

Many childhood cancers can begin with vague symptoms. For example, brain tumours in children are frequently misdiagnosed as migraines or viral illness in early stages, while leukaemia may initially present as fatigue or recurrent infections. This might include feeling tired, fever, aches, swollen glands and complaints of a ‘sore tummy’. These tend to be similar symptoms GPs see every day in children with viral infections. But the key difference will be the child does not get better. Rather they remain unwell with on-going symptoms which may even become more severe.

In clinical negligence cases, we frequently see the same pattern:

• A child presents with flu‑like symptoms
• A GP or clinician assumes a viral infection
• No safety‑netting advice is given such as what actions to take if symptoms do not improve.
• Symptoms persist or worsen
• Parents return repeatedly
• Escalation does not happen
• Cancer is diagnosed late, often after emergency admission

This is not about laying blame and not every delayed or misdiagnosis case may lead to a clinical negligence case. But if the child’s cancer progresses without any further checks or investigation taking place, the law recognises that families may have grounds for a clinical negligence claim.

10 Red Flags That Should Trigger Escalation

While very case is unique and different, there are some symptoms which should proceed to further investigation if they persist beyond the expected course of a viral illness. These may include:

• Unexplained or prolonged fever
• Persistent fatigue or lethargy
• Night sweats
• Unexplained bruising
• Ongoing bone or joint pain
• Recurrent infections
• Swollen lymph nodes that do not resolve
• Unexplained weight loss
• Persistent abdominal pain or swelling
• Headaches with vomiting, especially in the morning

In many negligence claims, these symptoms may have continued for weeks, or even months. Unfortunately, parents often describe feeling dismissed or even told they were “overreacting.” When a clinician does not recognise that the child’s symptoms have moved beyond a viral infection, that failure can amount to a breach of duty.

When Does Failure Become Clinical Negligence?

To bring a successful clinical negligence claim in England and Wales, parents need to be aware that they will be required to show:

A breach of duty – this means that the care fell below the standard expected of a reasonably competent clinician.

Causation – that this substandard treatment and breach of duty failure caused harm or worsened the outcome

In childhood cancer cases, breach of duty often centres on failure to:

• Take a proper history
• Examine the child thoroughly
• Recognise red‑flag symptoms
• Arrange blood tests, imaging, or urgent referral
• Provide safety‑netting advice
• Act on repeated attendances

Causation is usually linked to the delay in diagnosis. Some childhood cancers can progress quickly and so early treatment can make a big difference. In a real life example, a delay of even a few weeks can mean the difference between a localised cancer and one that has spread and may need more aggressive treatment.

The Emotional Toll on Families

Parents often carry a burden of guilt, even though they did everything they could, including sleepless nights and repeated visits to the doctor. Many describe feeling dismissed when they raised concerns. Some were told they were being over-anxious, or that their child simply needed rest. Sadly, when the diagnosis is eventually made, families are left trying to deal with not only with the shock of cancer but also the knowledge that earlier intervention might have changed everything.

A clinical negligence claim cannot undo the trauma, but it can provide answers and financial support for the child’s ongoing needs. It can also help families feel heard after months of being ignored.

Why These Claims Matter

While parents may feel overwhelmed and angry, a clinical negligence claim is not about blame but rather about:

• Ensuring children receive timely, appropriate care
• Helping families access the support they need
• Highlighting systemic issues in paediatric assessment
• Preventing the same mistakes from happening to other children

When patterns emerge, such as persistent symptoms repeatedly dismissed as viral infections, it becomes clear that something in the system needs to change. Clinical negligence claims play an important role in driving that change.

Examples of Where Negligence May Arise

While every case is different, common scenarios include:

1. Repeated GP visits without escalation

A young child was taken to the GP four times over six weeks with ongoing fever, extreme tiredness, and repeated infections. Each time, the GP reassured the parents it was “just another virus” and advised rest. No blood tests were arranged, and no safety‑netting advice was given. When the child later collapsed and was taken to A&E, blood tests revealed leukaemia. The delay meant the cancer had progressed, requiring more intensive treatment.

2. Persistent Bone Pain Dismissed as Post‑Viral Fatigue

A child complained of leg pain that worsened over several weeks. The GP put it down as post‑viral fatigue following a recent cold. Despite the pain becoming severe enough to affect walking, no examination of the limbs was carried out and no referral was made. Eventually, an X‑ray arranged by an out‑of‑hours doctor revealed a bone tumour. Earlier escalation could have led to a much earlier diagnosis.

3. Recurrent “Viral” Symptoms Overlooked as a Pattern

A child was repeatedly taken to the GP with night sweats, swollen glands, and weight loss. Each visit was treated as a separate viral illness. It seemed that no-one reviewed the child’s history as a whole, and no clinician recognised the pattern of persistent, escalating symptoms. When the child was eventually referred, the cancer had already spread, reducing treatment options.

4. Abnormal Blood Results Not Acted Upon

A GP ordered blood tests after a child presented with prolonged fever and bruising. The results showed abnormalities that should have triggered urgent referral. Instead, the GP assumed the results were “consistent with a viral infection” and did not arrange follow‑up testing. The child’s symptoms worsened, and a later hospital admission confirmed cancer. This delay had allowed the disease to advance.

5. Parental Concerns Not Taken Seriously

Parents repeatedly told their GP that their child “just wasn’t themselves” and that something felt seriously wrong. Despite ongoing fatigue, pallor, and loss of appetite, the GP reassured them it was a lingering virus and did not take it further. When the child was later seen by a different clinician, they were immediately referred for urgent tests, which confirmed cancer. The earlier dismissal of parental concern contributed to a significant diagnostic delay.

 How a Clinical Negligence Claim Can Help For Misdiagnosed Childhood Cancer

A successful claim can provide compensation for:

• Pain and suffering
• Past and future medical needs
• Rehabilitation and therapy
• Travel and care costs
• Loss of earnings for parents who must reduce work to care for their child

For parents, claims also move beyond compensation as they may often uncover what went wrong and why. We strongly feel that families deserve to know that lessons will be learned.

Taking the First Step

Your child’s cancer may have been diagnosed late because symptoms were repeatedly dismissed as viral or because persistent symptoms were not escalated. Getting legal advice can help you to understand whether negligence played a role.

A conversation with a specialist clinical negligence solicitor can provide much needed reassurance, and a sense of direction at a time when everything feels overwhelming.

We will guide you through the claims process and we work with highly experienced lawyers who will assess all aspects of your case

Contact us today at 0333 358 3034 or complete our online contact form to arrange an initial, no-obligation telephone consultation.

This blog is for informational purposes only and does not constitute legal or medical advice. Always consult with a medical professional and a qualified solicitor to understand your specific circumstances.