Hi Deborah151, I have a similar situation. I have a 5 cm. complex cyst on my left ovary that was diagnosed at the beginning of Aug. After closely watching it (I have no pain) with 3 TVU's, one CT scan and two CA-125's drawn (both within normal limits) I am FINALLY scheduled for a laparatomy on Nov. 16th for removal of the left ovary and a complete hysterectomy (I have a fibroid as well). That makes it about 4 months. Although my Dr. thinks it's endometriosis as yours does - I am, as MarieMichele suggested above, having a gyn/oncologist on call that day with my ob/gyn so they can do a frozen section biopsy while I'm in surgery. Waiting that long takes its toll on you mentally as you begin to imagine all sorts of bad things. I'm with MarieMichele - if you can schedule it sooner - do it. I will be very happy to finally get this behind me! I wish you the very best with a quick recovery!!
If the doctor has some suspicion of cancer, then yes, 4 months is too long to wait to remove a cyst. Mine had me wait no more than 3 days for surgery but my doctor had a lot of influence.
It's still a rare cancer, thankfully, but when there's any cause for concern, surgery should be scheduled within about a week or two and it should be a gynecologist/oncologist performing the surgery. Catch and remove it early for the best outcome.
Is it possible to get an earlier surgery date in your area?