Woman who thought she was just fat discovers weight gain Mary Clancey, 71, tried every diet in the book but couldn’t shift her excess weight – until doctors discovered it was actually a huge cyst A woman who thought she was just getting fat with old age was gobsmacked to discover shed been carrying a 10 STONE tumour. Mary Clancey tried for years and attempted every diet in the book to shift her excess weight but to no avail. The 71-year-old assumed she was just suffering from a persistent weight problem when she tipped the scales at more than 350lbs. But doctors eventually discovered a 140lb tumour in her stomach in November. Mary Clancey just assumed she was getting fat with age. Clancey, from Saint Clair, Pennsylvania, is now half the woman she used to be now that the 10-stone cyst has been surgically removed, local news station WNEP reported. Clancey says she felt like Sigourney Weaver in the horror movie Alien. She told the news station: I tried this that and whatever was on TV. I exercised and did all sorts of things, and I just kept getting rounder.. The 71-year-old weighed more than 350lbs despite dieting and exercising . But in November, blood clots in her legs meant she needed some additional tests and the astonishing truth was discovered. I was so shocked when they told me. The first thing I thought was Sigourney Weaver with the Alien. I was so scared. I thought, what could this be then?. Doctors removed the giant 10-stone tumour. Clanceys doctors carefully removed the ovarian cyst that may have gradually grown inside her body for some 16 years. Once the tumour and excess skin were removed, the station said Marys weight dropped from more than 350 pounds to just 150 pounds. Clancey was half the woman she was overnight. She told the channel: For four days after that surgery, I cant describe it. It felt like something was empty. My body didnt feel right. I guess I was so used to carrying that weight that I felt totally different.. Proving her amazing attitude to what she has been through, she said: I gained 10 pounds since I got home from the hospital. Hopefully, Ill get curvy. Ill be one hot babe eventually..