Despite
how many children including Charlotte I know who have some form of cancer,
Childhood cancer is described as RARE - around 1,500 new cases are diagnosed
every year in the UK. This
means that around one child in 500 will develop some form of cancer by the age
of 14 years. The rarity of childhood cancer does impede funding & research.
But there is hope for many - more than seven in 10 children diagnosed with
cancer can now be cured.
Types
of Cancer
Charlotte has Acute
Lymphoblastic Leukaemia the most common childhood cancer. Leukaemia (cancer of
the blood) as a whole equates to *31% of child cancer cases, with Brain &
Spinal tumours accounting for 25% (around 390 cases per year), its then quite a
drop to Lymphomas (cancer starting in the lymphatic system) at 10% (around 160
cases per year).
Britain has the lowest childhood cancer rate in Europe, and one of the lowest of all western industrialized countries. Australia and the US have some of the highest rates. The reasons for this are not clear.
Breakdown by type of cancer
Relative contributions of main
diagnostic groups of childhood cancer to overall incidence among children aged
0 to 14 years, Great Britain, 2001 to 2005
Based on data provided by National Registry of
Childhood Tumours
(http://www.ccrg.ox.ac.uk/datasets/registrations.htm)
Survival
rates
Survival rates for the 12 main diagnostic groups
vary between 96 per cent for retinoblastoma and 53 per cent for neuroblastoma. And within these main diagnostic groups,
survival rates vary even more. Some rare sub-types of cancer have survival
rates of zero.
Although Brain and Spinal tumours rank second in
incidence, they rank highest in terms of the number of deaths from cancer in childhood.
In the 10 years from 1995 to 2004, 1,115 children died as a result of CNS
tumours, just under a third of all childhood cancer deaths. And, yet I’ve read
somewhere else that the least is spent on it in research terms?
The Causes?
Despite
a wealth of research, much uncertainty remains over the causes of childhood
cancers.
Many different factors have been linked with the development of childhood
cancer, with varying degrees of certainty.
Research is complicated by the fact that there are many different factors which
may cause cancer in children. Exposure to more than one of these factors is
probably necessary – and probably at different stages of a child’s life.
The relative rarity of childhood cancers further impedes research.
Leukaemia is better represented in research literature than other forms of
cancer because it affects more children, making it easier to obtain meaningful
results in epidemiological studies. International collaborations are important
as they increase the number of cancer cases available for study.
Treatment
As well as finding new ways to treat those forms of
cancer which still have a poor outlook, a major challenge facing doctors today
is how to make treatments safer and minimise the risk of treatment-related harm
in young patients.
Most children diagnosed with cancer in the UK will
immediately be referred to one of 21 hospitals that are specialist centres for
treating children’s cancer.
Doctors at the specialist centre will confirm the
diagnosis and plan the child’s treatment. Some of the later treatment may be
given at the family’s local hospital under the guidance of the specialist
centre – this is known as shared care.
There are three main ways of treating cancer:
Solid
tumours can be cut out during an operation (surgery)
Often a combination of these treatments is used.
Clinical
trials
Many children have their treatment as part of
a clinical research trial.
Trials aim to improve our understanding of the best
way to treat childhood cancers – they usually compare the standard treatment
with a new or modified version of the standard treatment. Information gathered
from successive trials has been one of the most important factors in the
increasing survival rates for childhood cancer.
Taking part in a clinical trial is entirely
voluntary; the medical team will provide detailed information and you will be
given plenty of time to decide whether it is right for your child. Children who
do not take part will receive the current standard treatment.
Side
effects and complications
Treatments for cancer involve high doses of
toxic drugs and/or radiation. These therapies are effective in killing the
deadly cancerous cells but unfortunately they can also damage normal, healthy
cells, putting the child at risk of harmful side-effects.
Short-term side effects such as hair loss, nausea and
anaemia are common but temporary problems. With good supportive care, they can
be kept to a minimum.
But some children may experience more serious
long-term effects, which persist for months or years after treatment, or ‘late’
effects which do not develop or become apparent until years after treatment
ends. The risk of these effects varies from child to child, depending on the
treatments used and the age and developmental stage of the child.
A major consideration in the development of new
treatments is how to minimise the risk of harmful effects.