Eating just 50g a day of processed meats increases the risk of bowel cancer by 18 per cent, the World Health Organisation report said. Processed meat refers to meat that has been salted, cured, fermented, smoked, or has gone through any other processes to enhance flavour or improve preservation. This includes ham, salami, chorizo, corned beef, bilton or beef jerky as well as canned meat and meat-based preparations and sauces. It does not include most mince from butchers and supermarkets but sausages and burgers count unless they are home made. Here, we reveal what 50g of processed meat looks like, including 1.7 meatballs (top left), half a hot dog (bottom centre) and 10 slices of chorizo (top right).

Doctors initially thought Tracey Allcock (bottom right), from Shropshire, was having twins. But later scans revealed her rare 'heterotopic' pregnancy had started as quadruplets with three empty embryo sacs (top right) alongside a healthy foetus (circled). Medics faced a race against time to remove her fallopian tube and stop it rupturing - saving her life and that of her unborn baby. Experts say George (left) defied the odds to survive the operation and be born healthy.

Glenda McElduff wore a bikini (centre) for the first time when she turned 40. The mother-of-two from Sydney's west had lost more than 40 kilograms through diet and exercise, and with the lost kilograms came a renewed sense of confidence. In the space of 13 months she went from not being confident enough to walk in the gym (left) to embracing gruelling workouts with a personal trainer (inset) so she could compete in a body building contest.

WARNING: GRAPHIC CONTENT - Sunil Dade (left), 33, of Greenford, west London, squeezed out all the poison he could from the bite by the spider (centre) - but a huge section of skin turned black around it, covering the full width of his neck and measuring more than six inches from top to bottom. Over a week later, the blackened skin (right) has peeled off but the area is still red-raw and is making turning his head and sleeping difficult. Mr Dade said he initially tried to ignore the burning pain but the next day saw his GP who sent him straight to accident and emergency. He was prescribed antibiotics but his skin continued to turn black, then started peeling off, which lasted for days.

Laura Bacon-Smith, 27, from Chesterfield, Derbyshire, was diagnosed with hepatic epithelioid hemangio endothelioma - a rare type of cancer affecting the blood vessels - in 2010 (inset). She was told she had just six months to live and created a bucket list with boyfriend Lewis Neeve, 23 (right). But five years later she is still alive and this April she found out she is pregnant (left). Doctors had warned her chemotherapy had made her infertile, so she calls her child her 'miracle baby'. She said: 'My whole life completely changed after my diagnosis, but here I am five years later expecting a baby. I have to pinch myself sometimes, I still can't believe it, I feel so lucky to be alive and make the most of every day now.'

GRAPHIC CONTENT: Breast cancer survivor Jenn Alter (left), 36, from Saint Louis, Missouri, uploaded the photos (inset), which have now gone viral, to her Tumblr blog Pushing In the Pin. The pictures, which Jenn posted with the caption 'here's your f****** breast cancer awareness' show the mother's red-raw chest after a 35-day radiation treatment. At first glance Jenn's (pictured with her husband, right) chest resembles a burn victim's wounds, with seared flesh and painful-looking red patches of skin surrounding her breast.

Sarah Richards, 24, bought the £10 novelty eyes, which had distinct white irises, from a store in Stratford-upon-Avon. Hours later she was in agony and unable to work for a week after developing a nasty eye infection. She is now warning other party-goers to shun horror peeper-accessories as Halloween approaches next Saturday.

The method involves using a small piece of wire, up to 2cm long, inside a small plastic tube to make the splint. This is curved slightly and is most commonly placed inside the outer fold of the auricle, although it can be positioned elsewhere, depending on the kind of deformity present. The splint must be worn for 24 hours a day for about ten weeks. Welsh footballer Gareth Bale (pictured), 26, suffered cruel playground jibes as a youngster because of his prominent ears, and in July 2012 reportedly had surgery to 'streamline' them before his £85 million transfer from Tottenham to Real Madrid.

Kim Phuc, who became famous for a horrific photo of her being burned in a napalm attack when she was nine, is now 52 and starting laser treatments that might finally end her chronic pain. Dr. Jill Waibel of Miami Dermatology and Laser Institute offered her services for free when she learned of Phuc's tragic story.

Harmonie-Rose Allen, from Bath, was struck down by the killer bug in September last year when she was nine-months-old - just ten days after taking her first faltering steps. Doctors told her parents Freya Hall and Ross Allen she had one of the worst cases of the virus they had even seen and only gave her a ten per cent chance of survival. Harmonie beat the odds - but lost both her legs and arms and the tip of her nose in the process. Now two years old, she is learning to adapt to a new way of life thanks to a new standing frame, which her parents hope will help her to walk. Her delighted mother posted on Facebook: 'Harmonie will be standing straight in no time. Fun fun fun!! Well done Harmonie Rose you make us so proud!'

One minute he is cycling, the next he has fallen to the ground and is suffering a terrifying epileptic seizure. For more than two minutes, cyclist Tim Fry lies on a stretch of track, suffering convulsions. He is powerless to get up. By chance, his frightening ordeal was captured in its entirety by the video camera attached to his bike helmet. Mr Fry, from East Sussex, has now decided to share the footage in the hope it will help others understand what it is like to have a seizure - and the time it takes to recover.

Sara LeeAnn Pryde, from California, said the portrait series is a visual documentation of one of her autistic meltdowns, which she photographed six years ago as a form of self-exploration. In the black and white images, Sara can be seen wrapped in a towel and curled on the floor of her bathroom in tears, as mascara streams down her face.

Extraordinary footage of a boy's heart beating outside his body under a thin layer of skin has emerged. Born with a rare defect, now 18, Arpit Gohil's parents were told he probably wouldn't survive and the slightest bump could kill him. Arpit (pictured and inset) from Gujarat state, India, was born with extreme Pentalogy of Cantrell, with vital organs are positioned outside of the body. Despite the bleak outlook, Arpit has defied doctors and led a 'happy' and 'normal' childhood climbing trees and driving a tractor on his father's farm - even though the slightest bump or fall could kill him instantly.

Sonya Angelone, a spokeswoman for the Academy of Nutrition and Dietetics, broke down the process from ingestion to four hours after eating. She said one slice of pizza will not affect a healthy person or cause weight gain, but could spell danger for someone who has high blood pressure, is overweight, or smokes.