A HUDDERSFIELD woman who has survived two brain tumours now lives in fear that it may return for a third time.
Yet brave Salendine Nook High teacher Cathi Core is helping others with similar conditions around the world and raising money to support a charity dedicated to helping people with brain tumours.
She said: "I live with the acceptance that it probably will grow back, but no-one can tell you either way. Maybe they will in the future.
"We can but hope that will change."
This weekend she is taking part in a charity run with her family.
Cathi, 37, her school's head of languages, is taking part in Sunday's Leeds Family Fun Run with her five-year-old son, Tom.
Her husband Ian, 33, will run in the Leeds Half Marathon at the same time.
The family is raising money for the Samantha Dickson Brain Tumour Trust. The trust is the largest brain tumour charity in the UK, paying for vital research projects and offering support to sufferers.
Cathi was first diagnosed with a slow-growing brain tumour in 2002.
"After suffering fits during pregnancy late in 2001 they made me have a CT scan," she said. "I had a previous history of epilepsy, so we all blamed the pregnancy for it returning.
"They found the tumour and operated in April, 2002, at Leeds General Infirmary and removed all that could be seen.
"I then had regular scans, but last year they found it had grown again.
"They operated last June and again removed all they could see and were happy with the outcome."
Both times the tumour came back it was graded level two - which is considered low - but Cathi still had a lucky escape.
She added: "It was in the right frontal lobe of the brain and not in a place where it could cause any particular damage. But last time it was close to the motor cortex, which controls my left-hand side.
"I am now scanned yearly again and very lucky to be in that position."
Despite her illness, Cathi has been determined to raise money to help others suffering from the condition.
She took part in the Race For Life straight after her first operation, raising money for Cancer Research.
The Leeds runs next week will be the first time the Core family have taken part in a fundraiser together.
They hope to raise £2,000.
They will be cheered on by family and friends.
Cathi said: "Ian was always going to do the half-marathon with colleagues from work and it seemed sensible for all the family to get in on the act to raise money for a good cause very close to our hearts.
"The charity is incredibly important in terms of the research it funds, but also in terms of support they can offer.
"Through it I found a Yahoo internet site group which supports brain tumour sufferers and I'm now an active member.
"This has been a fabulous way to keep in touch with other sufferers from round the world and share experiences.
"Having a brain tumour can make you feel very isolated- they are usually found in men above 40-but there are a lot of younger people who are members of the Yahoo group."
The family has been busy preparing for the runs together.
Cathi said: "We've all done lots of cycling. Ian cycles to work and back every day and has been doing runs as well. Tom and I have been training, doing shorter runs nearer the house.
"Tom's very excited. I'm not sure he will manage the fun run's full mile and a half, but he's a determined five-year- old."
Cathi is still living with a reminder of her illness; she has to rely on her friends and colleagues for lifts because she is not allowed to drive for 12 months after her operation.
But she now determined more than ever to live life to the full.
She said: "The illness is always there in the background.
"But you realise certain things aren't worth worrying about and you are determined to enjoy your time while you can."
To support the Core family go to www.justgiving.com/cathicore