Raising money for charity wouldn't necessarily be most people's first thought after waking up from a complex operation but that was exactly the case for one schoolboy.

Eastern Daily Press: Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September. Pictured in hospital following his operation where he was visited by Tim Peake.Byline: Sonya DuncanCopyright: Archant 2016Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September. Pictured in hospital following his operation where he was visited by Tim Peake.Byline: Sonya DuncanCopyright: Archant 2016 (Image: Archant 2016)

Logan Farmer, 10, from East Harling, had just had a brain tumour removed at Great Ormond Street Hospital in London. And when he came round from the anaesthetic in the early hours of the morning the first thing he told his mum was that he wanted to do some fundraising for the hospital and The Brain Tumour Charity.

'It was my idea as I went through it and wanted to raise money for other kids who will go through what I had to,' said the Garboldisham Primary School pupil.

The tumour on Logan's brain was benign but it took doctors nearly three years to diagnose that it was the growth which was causing him some health problems.

From the age of seven the sports-lover had been gaining a large amount of excessive weight which caused a detrimental effect on his life physically and mentally.

Eastern Daily Press: Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September.Byline: Sonya DuncanCopyright: Archant 2016Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September.Byline: Sonya DuncanCopyright: Archant 2016 (Image: Archant 2016)

'He had gained an excessive amount of weight and we didn't know why as my kids had always eaten very healthy and he did so much sport,' said his mum Julie Humphreys.

'We had appointments with doctors and dieticians and they didn't believe I was being truthful in the food diary.

'It wasn't until I researched early puberty boys and mentioned it to the doctors that things started to move and we saw a consultant.'

After tests Logan was diagnosed with Cushing's syndrome and sent to Great Ormond Street Hospital in September for surgery to remove the tumour. The operation was successful but he is now on medication five times a day to control his hormones.

Eastern Daily Press: Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September. Pictured in hospital following his operation where he was visited by Tim Peake.Byline: Sonya DuncanCopyright: Archant 2016Logan Farmer is fundraising for Great Ormand Street and the Brain Tumour Charity after undergoing surgery for a brain tumour himself in September. Pictured in hospital following his operation where he was visited by Tim Peake.Byline: Sonya DuncanCopyright: Archant 2016 (Image: Archant 2016)

And whilst he was recovering from surgery he got a surprise visit from astronaut Tim Peake.

'It was good to meet him we had a talk about when he took off to go to space and what it was like and I got a photo,' said Logan.

Since the operation Logan has lost two stone and is back school. He has already raised £1,000 for Great Ormond Street thanks to a donation from his old nursery school and he is now looking forward to returning to some of his favourite activities.

He added: 'I am doing much better now and can't wait to got back and play all my sports like I did before, especially rugby.'

What is Cushing's syndrome?

Cushing's syndrome occurs when the body is exposed to high levels of the hormone cortisol for a long time. Also called hypercortisolism it can occur when a tumour of the adrenal gland releases excess amounts of the hormone.

Symptoms include weight gain, thinning skin that bruises easily, reddish-purple stretch marks, fat deposits that develop in the face, causing it to become round and muscle or bone weakness.

It can difficult to diagnose because the symptoms are similar to those of other more common conditions, such as an underactive thyroid gland and high blood pressure.

• To donate to Logan's appeal visit his Just Giving page.