Understanding a Pelvic Growth: Fibroid or Polyp?

Question
Something just dawned on me. Mid January I went for a ct scan of the pelvis to look for bowel problems (none found).  They did however mention that I had a 3 cm growth mostly likely a leioyma (sp?).  When I went to the Gynecologist early April for the sonohystagram it measured 1.7 cm.  During my period I have been seeing pinish tissue which I normally don't see. Could this be a degenerating fibroid on a stalk?  My regular Dr said he thought it was a polyp on the sono but couldn't be sure because it's difficult to distinguish the two until you actually see it?  If it is degenerating wouldn't that explain the pressure feeling?


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Followup To
Question -
I spoke with you before regarding my 1.7 cm polyp in the uterus.  I am having a hysteroscopy next Friday May 5th.  I have asked for it to be done with an epidural because I am afraid of general.  I have been reading and see there is a risk of fluid absorbtion.  I am getting scared.  Is this a high risk?
Answer -
During a hysteroscopy, the fluid volume will be carefully monitored and you should not have any probleks. For a 1.7cm polyp, epidural anesthesia will be fine. This procedure is very low risk. Don't worry.

Answer
The finding of a 3cm growth on the CT scan could be the dams structure they saw on sonogram (1.7cm polyp). A sonogram is more accurate than a CT scan in identifying pelvic findings. When they do the hysteroscopy, they will know for sure. Polyps or degenerating fibroids do not give pressure usually. Degenerating fibroids can cause poain, but a fibroid under 5cm uaually will not cause any symptoms at all.