Dr. Kafui Akakpo, a pathologist, holds a specimen with a tumour at the Pathologists Without Borders laboratory in Accra, Ghana May 16, 2022. Picture taken May 16, 2022. REUTERS/Francis Kokoroko 

Dr. Kafui Akakpo, a pathologist, observes a breast lump with a tumour at the Pathologists Without Borders laboratory in Accra, Ghana May 16, 2022. Picture taken May 16, 2022. REUTERS/Francis Kokoroko 

Dr. Kafui Akakpo, a pathologist, observes a breast lump with a tumour, at the Pathologists Without Borders laboratory in Accra, Ghana May 16, 2022. Picture taken May 16, 2022. REUTERS/Francis Kokoroko 

Dr. Kafui Akakpo, a pathologist, observes a breast lump with a tumour at the Pathologists Without Borders laboratory in Accra, Ghana May 16, 2022. Picture taken May 16, 2022. REUTERS/Francis Kokoroko 

Blood analog is pumped through vessel-like tubes for use in a 3D model of a tumour, as part of a brain cancer research that uses patients' cells to make 3D printed models of tumours, at Tel Aviv University, Israel August 17, 2021. Picture taken August 17, 2021. REUTERS/Nir Elias 

Israeli researcher Lena Neufeld examines a 3D model of a blood vessel-like tube, as part of a brain cancer research that uses patients' cells to make 3D printed models of tumours, at Tel Aviv University, Israel August 17, 2021. Picture taken August 17, 2021. REUTERS/Nir Elias 

A 3D model of a tumour is made using bioprinting technology, as part of a brain cancer research that uses patients' cells to make 3D printed models of tumours, at Tel Aviv University, Israel August 17, 2021. Picture taken August 17, 2021. REUTERS/Nir Elias 

Israeli researcher Lena Neufeld examines a 3D model of a malignant tumour, as part of a brain cancer research that uses patients' cells to make 3D printed models of tumours, at Tel Aviv University, Israel August 17, 2021. Picture taken August 17, 2021. REUTERS/Nir Elias 

Israeli researcher Eilam Yeini examines a microscope image of a blood vessel tube surrounded by cancer tissues, as part of a brain cancer research that uses patients' cells to make 3D printed models of tumours, at Tel Aviv University, Israel August 17, 2021. Picture taken August 17, 2021. REUTERS/Nir Elias 

Tattoo artist Alvaro Quesada, who is blind in one eye due to a tumour, reacts upon inspecting the breasts of cancer survivor Mamen Malagon at the Hospital Universitario de Torrejon, in Torrejon de Ardoz, outside Madrid, Spain, March 23, 2017. Picture taken March 23, 2017. REUTERS/Susana Vera 

Tattoo artist Alvaro Quesada, who is blind in one eye due to a tumour, drives to the Hospital Universitario de Torrejon, in Torrejon de Ardoz, outside Madrid, Spain, March 23, 2017. Picture taken March 23, 2017. REUTERS/Susana Vera 

Tattoo artist Alvaro Quesada, who is blind in one eye due to a tumour, inspects the breasts of cancer survivor Mamen Malagon at the Hospital Universitario de Torrejon, in Torrejon de Ardoz, outside Madrid, Spain, March 23, 2017. Picture taken March 23, 2017. REUTERS/Susana Vera 

Tattoo artist Alvaro Quesada, who is blind in one eye due to a tumour, gets a hug from cancer survivor Mamen Malagon after tattooing a nipple on her reconstructed breast at the Hospital Universitario de Torrejon, in Torrejon de Ardoz, outside Madrid, Spain, March 23, 2017. Picture taken March 23, 2017. REUTERS/Susana Vera 

Neurosurgeon Linda Liau, MD, 49, Professor and Director of the UCLA Brain Tumor Program (C) removes a brain tumour from a patient at the Ronald Reagan UCLA Medical Center in Los Angeles, California, United States, May 26, 2016. Liau has been a neurosurgeon for 25 years and has developed a brain cancer vaccine that is in clinical trials. “It’s a very male-dominated profession... When you walk into the room they assume you’re the nurse or the assistant as opposed to the actual surgeon," Liau said. "I think ultimately the goal would be to be gender-blind completely, so the fact that we’re even talking about having a female president as a novelty is in a way sad." Picture taken May 26, 2016. REUTERS/Lucy Nicholson SEARCH "WOMEN WORKERS" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Neurosurgeon Linda Liau, MD, 49, Professor and Director of the UCLA Brain Tumor Program walks out of the operating theatre after successfully removing a tumour from a patient at the Ronald Reagan UCLA Medical Center in Los Angeles, California, United States, May 26, 2016. Liau has been a neurosurgeon for 25 years and has developed a brain cancer vaccine that is in clinical trials. ÒItÕs a very male-dominated profession... When you walk into the room they assume youÕre the nurse or the assistant as opposed to the actual surgeon," Liau said. "I think ultimately the goal would be to be gender-blind completely, so the fact that weÕre even talking about having a female president as a novelty is in a way sad." Picture taken May 26, 2016. REUTERS/Lucy Nicholson SEARCH "WOMEN WORKERS" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Former Toronto Mayor and current city Councillor Rob Ford shakes hands as he leaves with his brother Doug Ford (R), after Canada's Prime Minister and Conservative leader Stephen Harper's campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Rob Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

Former Toronto Mayor and current city Councillor Rob Ford (2nd R) and his brother Doug Ford (3rd R), watch Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Rob Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery that removed a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

Former Toronto Mayor and current city Councillor Rob Ford arrives with his brother Doug Ford (2nd R), to show support for Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Rob Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

Former Toronto Mayor and current city Councillor Rob Ford arrives to show support for Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

Former Toronto Mayor and current city Councillor Rob Ford arrives to show support for Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

Former Toronto Mayor and current city Councillor Rob Ford arrives to show support for Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch TPX IMAGES OF THE DAY

Former Toronto Mayor and current city Councillor Rob Ford arrives to show support for Canada's Prime Minister and Conservative leader Stephen Harper at a campaign rally at William F. White International Inc, a stage lighting equipment supplier in Etobicoke, a suburb of Toronto, October 13, 2015. Ford, was a larger-than-life figure who made international headlines with his admission that he smoked crack cocaine while he was Toronto Mayor, arrived wearing a sweatsuit to remain comfortable while he recovers from surgery to remove a cancerous tumour in his abdomen earlier this year. Canadians will go to the polls for a federal election on October 19. REUTERS/Mark Blinch

South Korean former "comfort woman" Gil Won-ok is helped by a volunteer as she heads to the weekly Wednesday protest demanding an apology and compensation from the Japanese government in Seoul, South Korea, July 22, 2015. “Comfort womenâ€? is the Japanese euphemism for women who were forced into prostitution and sexually abused at Japanese military brothels before and during World War Two. According to her testimony to South Korean researchers, Gil, who was born in what is now North Korea in 1927, was taken to a Japanese military brothel in China in 1940. She caught syphilis and developed tumours as she worked as a "comfort woman". A Japanese military doctor removed her uterus leaving her unable to bear children. Gil said she wants to receive apology from Japanese government. REUTERS/Kim Kyung-HoonPICTURE 27 OF 33 FOR WIDER IMAGE STORY "COMFORT WOMAN SURVIVORS TELL THEIR STORIES" SEARCH "KIM COMFORT" FOR ALL PICTURES 

South Korean former "comfort woman" Gil Won-ok sits in her room at the “Our Homeâ€? shelter for former "comfort women" in Seoul, South Korea, July 23, 2015. “Comfort womenâ€? is the Japanese euphemism for women who were forced into prostitution and sexually abused at Japanese military brothels before and during World War Two. The shelter is run by an NGO. According to her testimony to South Korean researchers, Gil, who was born in what is now North Korea in 1927, was taken to a Japanese military brothel in China in 1940. She caught syphilis and developed tumours as she worked as a comfort woman and a Japanese military doctor removed her uterus leaving her unable to bear children. Gil said she wants to receive an apology from the Japanese government. REUTERS/Kim Kyung-HoonPICTURE 25 OF 33 FOR WIDER IMAGE STORY "COMFORT WOMAN SURVIVORS TELL THEIR STORIES" SEARCH "KIM COMFORT" FOR ALL PICTURES 

South Korean former "comfort woman" Gil Won-ok is helped by a volunteer as she heads to the weekly Wednesday protest demanding an apology and compensation from the Japanese government in Seoul, South Korea, July 22, 2015. "Comfort women" is the Japanese euphemism for women who were forced into prostitution and sexually abused at Japanese military brothels before and during World War Two. According to her testimony to South Korean researchers, Gil, who was born in what is now North Korea in 1927, was taken to a Japanese military brothel in China in 1940. She caught syphilis and developed tumours as she worked as a "comfort woman". A Japanese military doctor removed her uterus leaving her unable to bear children. Gil said she wants to receive apology from Japanese government. REUTERS/Kim Kyung-HoonPICTURE 27 OF 33 FOR WIDER IMAGE STORY "COMFORT WOMAN SURVIVORS TELL THEIR STORIES" SEARCH "KIM COMFORT" FOR ALL PICTURES 

South Korean former "comfort woman" Gil Won-ok sits in her room at the "Our Home" shelter for former "comfort women" in Seoul, South Korea, July 23, 2015. "Comfort women" is the Japanese euphemism for women who were forced into prostitution and sexually abused at Japanese military brothels before and during World War Two. The shelter is run by an NGO. According to her testimony to South Korean researchers, Gil, who was born in what is now North Korea in 1927, was taken to a Japanese military brothel in China in 1940. She caught syphilis and developed tumours as she worked as a comfort woman and a Japanese military doctor removed her uterus leaving her unable to bear children. Gil said she wants to receive an apology from the Japanese government. REUTERS/Kim Kyung-HoonPICTURE 25 OF 33 FOR WIDER IMAGE STORY "COMFORT WOMAN SURVIVORS TELL THEIR STORIES"SEARCH "KIM COMFORT" FOR ALL PICTURES 

A llama that has skin tumours receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. The zoo's veterinary hospital uses acupuncture and laser therapy to improve the health and well-being of animals with chronic diseases. REUTERS/Ueslei Marcelino 

A llama that has skin tumours receives laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. The zoo's veterinary hospital uses acupuncture and laser therapy to improve the health and well-being of animals with chronic diseases. REUTERS/Ueslei Marcelino 

A llama that has skin tumours receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. The zoo's veterinary hospital uses acupuncture and laser therapy to improve the health and well-being of animals with chronic diseases. REUTERS/Ueslei Marcelino 

An eight-year-old lion named Samuni is brought to a veterinary clinic before undergoing a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

Zoo staff and members of a veterinary team prepare an eight-year-old lion named Samuni for a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

An eight-year-old lion named Samuni is prepared for a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

An eight-year-old lion named Samuni is taken to a veterinary clinic before undergoing a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

Zoo staff and members of a veterinary team prepare an eight-year-old lion named Samuni for a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

Zoo staff and members of a veterinary team prepare an eight-year-old lion named Samuni for a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner

Zoo staff and members of a veterinary team prepare an eight-year-old lion named Samuni for a surgical procedure to remove a tumour from his abdomen at the Ramat Gan Safari Zoo, near Tel Aviv, Israel, July 29, 2015. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Nguyen Hong Phuc, a 63-year-old former soldier, sits on the bed with his son Nguyen Dinh Loc, 20, who is recovering from a recent tumour surgery at Friendship Village outside Hanoi April 8, 2015. Nguyen Dinh Loc has serious mental and physical problems that his family and doctors link to his father's exposure to Agent Orange. His father joined the military after the U.S. army stopped using Agent Orange in 1971, but lived in areas heavily contaminated by it, including near Danang airport, where the chemical defoliant was stored. REUTERS/Damir Sagolj 

63-year-old former soldier, Nguyen Hong Phuc, sits on the bed with his son Nguyen Dinh Loc, 20, who is recovering from tumour surgery at Friendship village, a hospice for Agent Orange victims, outside Hanoi April 8, 2015. Nguyen Dinh Loc has serious mental and physical problems that his family and doctors link to his father's exposure to Agent Orange. His father joined the military after the U.S. army stopped using Agent Orange in 1971, but lived in areas heavily contaminated by it, including near Danang airport, where the chemical defoliant was stored. REUTERS/Damir Sagolj

PICTURE 9 OF 24 FOR WIDER IMAGE STORY "VIETNAM: LEGACY OF AGENT ORANGE"??SEARCH "AGENT SAGOLJ" FOR ALL IMAGES 

A combination of pictures shows Alexandra Munoz, 5, who lost her hair due to chemotherapy for a brain tumour, posing for a photograph without (L) and with a natural hair wig (R), which she received as a donation from hair stylist Marcelo Avatte in the cancer ward of the Luis Calvo Mackenna Hospital in Santiago, October 30, 2014. The wigs, handmade by Italian-Chilean hair stylist Marcelo Avatte and his team, have helped the children regain their self-esteem and confidence during cancer treatment. Renowned for making customised wigs, Avatte has donated more than 300 wigs since 2009 and says he was motivated to begin the project by the pain he felt when his own son lost his hair during chemotherapy. Picture taken October 30, 2014. REUTERS/Rodrigo Garrido (CHILE - Tags: HEALTH SOCIETY TPX IMAGES OF THE DAY) 

Alexandra Munoz, 5, who lost her hair due to chemotherapy for a brain tumor, plays with her new natural hair wig after it was fitted to her for the first time in the cancer ward of the Luis Calvo Mackenna Hospital in Santiago, October 23, 2014. The wigs, handmade by Italian-Chilean hair stylist Marcelo Avatte and his team, have helped the children regain their self-esteem and confidence during cancer treatment. Renowned for making customised wigs, Avatte has donated more than 300 wigs since 2009 and says he was motivated to begin the project by the pain he felt when his own son lost his hair during chemotherapy. Picture taken October 23, 2014. REUTERS/Rodrigo Garrido (CHILE - Tags: HEALTH SOCIETY)

ATTENTION EDITORS: PICTURE 25 OF 25 FOR WIDER IMAGE PACKAGE 'REGAINING CONFIDENCE'. TO FIND ALL IMAGES SEARCH 'WIGS GARRIDO' 

Ashya King, a five-year-old British boy with brain tumour, leaves in an ambulance after finishing his treatment at the Proton Therapy Centre in Prague October 24, 2014. King had his first treatment on September 15 after his parents, Naghemeh and Brett King, attracted international attention by removing him from hospital in Britain against medical advice. The couple left Britain with their son at the end of August, saying they wanted to take him to the clinic in Prague as proton beam therapy is not currently available in Britain. King's parents were detained in Spain after an international manhunt that drew condemnation from the British media, separated from their sick son and then released days later by a Spanish judge. REUTERS/Rene Volfik (CZECH REPUBLICHEALTH - Tags: POLITICS HEALTH) 

An ambulance is seen as Ashya King (not pictured), a five-year-old British boy with brain tumour, leaves after finishing his treatment at the Proton Therapy Centre in Prague October 24, 2014. King had his first treatment on September 15 after his parents, Naghemeh and Brett King, attracted international attention by removing him from hospital in Britain against medical advice. The couple left Britain with their son at the end of August, saying they wanted to take him to the clinic in Prague as proton beam therapy is not currently available in Britain. King's parents were detained in Spain after an international manhunt that drew condemnation from the British media, separated from their sick son and then released days later by a Spanish judge REUTERS/Rene Volfik (CZECH REPUBLIC - Tags: POLITICS HEALTH) 

Ashya King, a five-year-old British boy with brain tumour, leaves with his mother Naghemeh after finishing his treatment at the Proton Therapy Centre in Prague October 24, 2014. King had his first treatment on September 15 after his parents, Naghemeh and Brett King, attracted international attention by removing him from hospital in Britain against medical advice. The couple left Britain with their son at the end of August, saying they wanted to take him to the clinic in Prague as proton beam therapy is not currently available in Britain. King's parents were detained in Spain after an international manhunt that drew condemnation from the British media, separated from their sick son and then released days later by a Spanish judge. REUTERS/Rene Volfik (CZECH REPUBLIC - Tags: POLITICS HEALTH) 

Ashya King, a 5-year-old British boy with brain tumour, leaves after finishing his treatment at the Proton Therapy Centre in Prague October 24, 2014. King had his first treatment on September 15 after his parents, Naghemeh and Brett King, attracted international attention by removing him from hospital in Britain against medical advice. The couple left Britain with their son at the end of August, saying they wanted to take him to the clinic in Prague as proton beam therapy is not currently available in Britain. King's parents were detained in Spain after an international manhunt that drew condemnation from the British media, separated from their sick son and then released days later by a Spanish judge REUTERS/Rene Volfik (CZECH REPUBLIC - Tags: POLITICS HEALTH) 

Ashya King, a five-year-old British boy with brain tumour, leaves with his mother Naghemeh (3rd R) after finishing his treatment at the Proton Therapy Centre in Prague October 24, 2014. King had his first treatment on September 15 after his parents, Naghemeh and Brett King, attracted international attention by removing him from hospital in Britain against medical advice. The couple left Britain with their son at the end of August, saying they wanted to take him to the clinic in Prague as proton beam therapy is not currently available in Britain. King's parents were detained in Spain after an international manhunt that drew condemnation from the British media, separated from their sick son and then released days later by a Spanish judge. REUTERS/Rene Volfik (CZECH REPUBLIC - Tags: POLITICS HEALTH TPX IMAGES OF THE DAY) 

Dr. Zane Cohen (middle) of Mount Sinai Hospital leaves after speaking to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Dr. Zane Cohen of Mount Sinai Hospital speaks to media about the condition of Toronto mayor Rob Ford during a news conference in Toronto September 17, 2014. Dr. Cohen said tests showed the mayor has a malignant liposarcoma tumour, and said he will begin chemotherapy treatment for his cancer shortly. REUTERS/Mark Blinch (CANADA - Tags: POLITICS SOCIETY HEALTH)

Ashya King, a 5-year-old British boy with a brain tumour, lies on a stretcher as he arrives at the Proton Therapy Center in Prague September 15, 2014. The British boy with a brain tumour, whose parents Brett and Naghemeh King were briefly arrested in Spain when seeking alternative care, is in Prague to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH SOCIETY) 

Ashya King, a 5-year-old British boy with a brain tumour, lies on a stretcher as he arrives at the Proton Therapy Center in Prague September 15, 2014. The British boy with a brain tumour, whose parents, Brett and Naghemeh King were briefly arrested in Spain when seeking alternative care, is in Prague to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH SOCIETY) 

Brett (L) and Naghemeh King, parents of 5-year-old Ashya King (not pictured), wait next to an ambulance car at the Proton Therapy Center in Prague September 9, 2014. The British boy with a brain tumour, whose parents were briefly arrested in Spain when seeking alternative care, arrived at a Prague hospital for treatment on Monday. He is due to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia at the newly built Proton Therapy Center (PTC) across town. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH) 

Ashya King, a 5-year-old British boy with a brain tumour, lies on a stretcher as he arrives with his parents at the Proton Therapy Center in Prague September 9, 2014. The British boy whose parents were briefly arrested in Spain when seeking alternative care, arrived at a Prague hospital for treatment on Monday. He is due to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia at the newly built Proton Therapy Center (PTC) across town. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH) 

Ashya King, a 5-year-old British boy with a brain tumour, lies on a stretcher as he arrives with his parents Brett (2nd L) and Naghemeh King (2nd R) at the Proton Therapy Center in Prague September 9, 2014. The British boy whose parents were briefly arrested in Spain when seeking alternative care, arrived at a Prague hospital for treatment on Monday. He is due to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia at the newly built Proton Therapy Center (PTC) across town. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH) 

Ashya King, a 5-year-old British boy with a brain tumour, lies on a stretcher as he arrives with his mother Naghemeh King at the Proton Therapy Center in Prague September 9, 2014. The British boy whose parents were briefly arrested in Spain when seeking alternative care, arrived at a Prague hospital for treatment on Monday. He is due to receive a series of 30 sessions of proton beam radiotherapy under full anaesthesia at the newly built Proton Therapy Center (PTC) across town. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH) 

Brett King, the father of 5-year-old British boy Ashya who has a brain tumour, answers questions from the media at the Proton Therapy Center in Prague September 8, 2014. Ashya, whose parents were briefly arrested in Spain when seeking alternative care for him, will receive treatment in Prague, a Czech clinic said on Monday. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH POLITICS) 

Brett King, the father of 5-year-old British boy Ashya who has a brain tumour, answers questions from the media at the Proton Therapy Center in Prague September 8, 2014. Ashya, whose parents were briefly arrested in Spain when seeking alternative care for him, will receive treatment in Prague, a Czech clinic said on Monday. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: HEALTH POLITICS)