World's reportedly heaviest man set to undergo surgery

The man believed to be the world's heaviest was preparing on Friday, May 5th to undergo biliopancreatic bypass surgery in Mexico.

According to local media, thirty-three-year-old Juan Pedro Franco - who has weighed up to 1,311 pounds - has been largely bed-ridden for the last seven years due to his large size. He was recently put on a diet to help shed some weight as doctors fear for his life.

The surgery is scheduled to take place on May 9, after Franco dropped 385 pounds over the last couple of months, making surgery possible.

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Mexican 32-year-old Juan Pedro Franco answers questions during a press conference in Guadalajara, Mexico on March 28, 2017. Franco was the most obese man in the world, but four months ago he underwent a treatment and managed to lose 170 kg. On a second stage he will undergo a surgery that will allow him to walk again.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds is prepared for tests at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds is prepared for tests at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds is prepared for tests at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds is prepared for tests at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on May 05, 2017. Franco who used to be the most obese man in the world, four months ago underwent a treatment and managed to lose 170 kg. On a second stage he undergoes a surgery on May 09, 2017.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco talks with his doctor Antonio Castaned during a press conference in Guadalajara, Mexico on March 28, 2017. Franco was the most obese man in the world, but four months ago he underwent a treatment and managed to lose 170 kg. On a second stage he will undergo a surgery that will allow him to walk again. 

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco answers questions during a press conference in Guadalajara, Mexico on March 28, 2017. Franco was the most obese man in the world, but four months ago he underwent a treatment and managed to lose 170 kg. On a second stage he will undergo a surgery that will allow him to walk again. 

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on November 15, 2016. Franco, who suffers from extreme obesity and has remained six years confined to bed, unable to walk, in the next few days will undergo a medical evaluation to see what possibilities he has to walk again. 

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco answers questions during a press conference in Guadalajara, Mexico on March 28, 2017. Franco was the most obese man in the world, but four months ago he underwent a treatment and managed to lose 170 kg. On a second stage he will undergo a surgery that will allow him to walk again.

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds answers questions during a press conference at the hospital in Guadalajara, Mexico on December 21, 2016. Franco, who suffers from extreme obesity and has remained six years confined to bed, unable to walk, is being assessed by doctors and will begin a special diet and exercise routine with the aim to lose 59 kilograms before undergoing a by-pass biliopancreatic diversion in two times in June 2017. 

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds answers questions during a press conference at the hospital in Guadalajara, Mexico on December 21, 2016. Franco, who suffers from extreme obesity and has remained six years confined to bed, unable to walk, is being assessed by doctors and will begin a special diet and exercise routine with the aim to lose 59 kilograms before undergoing a by-pass biliopancreatic diversion in two times in June 2017. 

(HECTOR GUERRERO/AFP/Getty Images)

Mexican 32-year-old Juan Pedro Franco, who weighs almost 1,100 pounds arrives at the hospital in Guadalajara, Mexico on November 15, 2016. Franco, who suffers from extreme obesity and has remained six years confined to bed, unable to walk, in the next few days will undergo a medical evaluation to see what possibilities he has to walk again.

(HECTOR GUERRERO/AFP/Getty Images)

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Five days before surgery are needed to prepare for the operation, where blood, imaging, pulmonary and cardiac function will be studied by a team of doctors.

Franco has battled obesity all of his life, but the problem took a turn for the worse following an injury at age 17.

Juan Pedro is from the small Mexican state of Aguacalientes and has been in Guadalajara for his treatment, over the last couple of months.

His mother, Maria de Jesus Salas Lemus, is optimistic about the outcome of the surgery.

Threats to his health ranging from diabetes to organ failure prompted the surgery, which is an important challenge for the medical science team due to Franco's weight.

Franco's doctor, Jose Castaneda will operate on Franco, together with other specialists including an instrumentalist as well as a team of two anaesthesiologists and a cardiologist who will watch over Franco's vital signs during the 20 -minute surgery.

Hopeful that his treatment will be a success, Franco also remains positive.

According to the World Health Organisation, Mexico is a global leader in obesity with 35 percent of its adolescents overweight or obese.

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