A prominent Melbourne surgeon is under investigation over allegations he performed unnecessary or excessive surgeries on young women.Over 100 women have come forward claiming they had reproductive tissue and sometimes organs removed by obstetrician and gynaecologist Dr Simon Gordon at The Epworth Hospital for severe endometriosis, despite little evidence they had the disease.A Four Corners report last night alleged Gordon performed unwanted surgeries, removing ovaries and at times the uterus of female patients when pathology results revealed they had little