@dhansen78 I have long been aware of ganglion cysts & neuromas which form on nerves, but the term ganglioneuroma was new to me, so I went searching...
It turns out that it is related to both, forms along the autonomic nerves and is usually benign (non-cancerous).
You can read about it here:
https://medlineplus.gov/ency/article/001437.htm
Oncological surgery practices tend to prioritize their workloads based on the urgency of the situation, which means people with malignant tumors are seen first.

I would suggest that if your daughter's symptoms increase to include any numbness or loss of function in her legs or loss of bowel or urinary control, she needs to push to be seen sooner. Perhaps there is a gynecological or general surgeon who can see her sooner?
Sue