Fibroid surgery complications
Whatever the route of surgery, myomectomy is classified as a major operation. The most important operative risk is excessive bleeding as the fibroids are being removed, potentially necessitating a blood transfusion, and in extreme cases, even hysterectomy. The risk of haemorrhage increases with the size of the fibroids being removed, and is therefore least with hysteroscopic myomectomy and greatest with open myomectomy. However, various strategies are available to reduce this risk (e.g. ensuring you are not anaemic at the time of surgery, pre-operative GnRH analogue treatment, the use of tourniquets or vaso-constrictor injections during surgery). As a result, the chances of proceeding to hysterectomy are extremely small even if you have large fibroids, and is probably less than 1%.
Other short-term complications such as infection, bruising, deep vein thrombosis, etc are not unique to myomectomy but apply to any major surgical procedure. There are also the route-specific potential complications, related to the route of surgery.