I have a 9cm ovarian cyst attached to my bowel. was referred to gynecologic oncologist for bowel resection. scared ill wake up with a colostomy bag?

Bowel resection?: Gyn oncologists are top experts in female cancers and surgery, but they don't usually manage cysts with bowel resction unless it's to cure cancer. Sounds like may be (?) some missing information here, you should get the facts from your referring doc and the oncologist.

Small chance only : I do not know what exactly you have. However, if there is no inflammation in the area, which i believe it is the case and if the size of the colon above the lesion is not too distended and if resection is needed you should not end up with a colostomy. However, you never know what will the surgeon see/find when he/she enters your abdomen. So, if all is relatively "clean" inside, your should be fine.