Women should get a second medical opinion if they are told to consider a hysterectomy because they have fibroid tumors that could become cancerous.// 'It is very, very rare that a fibroid tumor could become cancerous,' said Dr. Nelson Teng, chief of gynecologic oncology at the Stanford University School of Medicine. Fibroids are benign growths in the uterus which sometimes cause discomfort, pain and bleeding. According to Dr. Kevin Reynolds, chief of gynecologic oncology at the University of Michigan Comprehensive Cancer Center, in Ann Arbor, removal of fibroids is the largest single reason hysterectomies are performed in the United States. More than 500,000 are performed each year. According to Teng, doctors who say there is no way of telling whether a fibroid tumor is benign or cancerous until it is analyzed by a pathologist are technically correct, but