Hi welcome to HCM.
is a solid thing where as cyst is a fluid filled structure. If there is cystic changes in your fibroid it suggests that your fibroid is undergoing cystic degeneration. It is not the fibroid that is important in decision making but the symptoms that it causes. Your back pain
, lower abdominal pain
and heavy bleeding strongly suggest that you should have hysterectomy
(removal of the uterus). If you did not have any of these symptoms, then fibroid could have been left alone as it would gradually shrink, once your periods stop (menopause
It is better to have surgery, in your case.