MRI /PET / USG(pelvic results)

Hi DR.Goodman; Please explain what makes YOU think after receiving MRI/ PET /USG (pelvic results) that changes in ovary/ovaries are not  R/T primary ovarian cancer.Probably as a GYN /ONC  you  know immediately that observed ovarian changes could be related to different cancer (for example:plasmacytoma solitary/extramedullary etc.Is it possible to depend  on diagnostic tests ( mentioned above ) including laparoscopy/laparotomy  to confirm ovarian cancer? . In case of possible Plasmacytoma solitary / MM would you order still  tests such as : MYELOGRAM;CBC ;IMMUNOELECTROPHORESIS,BENCE JONES (urine),presence of protein M(serum,urine);BMD;X-RAY (skeletal);protein etc,etc.Is it not enough to have LAPAROSCOPY results to R/O  diagnosis ?     Sincerely     KIKA 17