Treatment options – surgical
Fibroids are the most common reason for hysterectomy as they are the contributing indication in approximately one-third of surgeries. When future fertility is desired, current surgical options include hysteroscopic and laparoscopic (including robotic) myomectomy. Hysteroscopy is the standard approach for FIGO type 1 fibroids and can also manage some type 2 fibroids provided they are less than 3 cm and the latter is greater than 5 mm from the serosa. Type 2 fibroids may benefit from a “two-step” removal to allow the myometrium to contract and extrude the fibroid. In light of the risk of fluid overload with nonelectrolyte solutions that enable the use of monopolar cautery, many procedures are now performed with bipolar cautery or morcellators.
Laparoscopy (including robotic) has outcomes similar to those of laparotomy although the risk of uterine rupture with the former requires careful attention to thorough closure of the myometrial defect. Robotic myomectomy has outcomes similar to those of standard laparoscopy with less blood loss, but operating times may be prolonged (Best Pract Res Clin Obstet Gynaecol. 2018;46:113-9).
The rate of myomectomy is reported to be 9.2 per 10,000 woman-years in Black women and 1.3 per 10,000 woman years in White women (Fertil Steril 2017;108;416-25). The rate of recurrence after myomectomy can be as great as 60% when patients are followed up to 5 years. Intramural fibroids greater than 2.85 cm and not distorting the uterine cavity may decrease in vitro fertilization (IVF) success (Fertil Steril 2014;101:716-21).
Noninvasive treatment modalities
Uterine artery embolization (UAE) is the most popular minimally invasive alternative to surgical myomectomy. Risks include postembolization syndrome (pain, fever, nausea, leukocytosis, and occasionally malaise), infection, and damage to fertility. Rarely, loss of ovarian function can occur, particularly in women above age 45. Because of the disruption of uterine blood flow, UAE increases the risk of accelerating ovarian aging and infertility as well as atrophic endometrium. In addition, pregnancy complications are increased including miscarriage, preterm labor, and postpartum hemorrhage. There is debate regarding the need for cesarean section at time of delivery given the potential for weakening of the uterine wall following UAE.
High-intensity focused ultrasound (HIFU) is guided by ultrasound or MRI and involves a high-energy-density ultrasound wave passing through the skin. The wave is absorbed and transformed into heat, causing the tissue protein to coagulate, and to be absorbed by the body. The procedure is scarless, carries a minimal risk of infection, and offers less pain compared with traditional approaches. However, HIFU is time consuming, and skin burns and unintentional tissue injury are a risk. A meta-analysis demonstrated improved symptoms of fibroids at 6 and 12 months (J Min Invasive Gynecol. 2021 in press).
Ultrasound-guided microwave ablation (MWA) uses an ablative electrode that is directly inserted into the target tissue via transcutaneous or transcervical approach via ultrasound guidance using microwave to produce heat for tissue coagulation necrosis. The advantages of MWA compared with HIFU and RFA are a higher tissue temperature, larger ablation volume, shorter operating time, less pain and no adverse major events (J Min Invasive Gynecol. 2021, in press).
Conclusion
The current literature cannot conclude that fibroids reduce the likelihood of achieving pregnancy with or without fertility treatment, based on a specific size, number, or location (not including submucosal or cavity-distorting intramural fibroids). Definitive evidence on the efficacy of myomectomy to improve fertility remains limited. Hysteroscopic myomectomy presumably improves pregnancy rates, but there is uncertainty as to its role in reducing miscarriage. Novel nonsurgical modalities are available and are expected to continue being developed but clarity on fertility outcomes is needed.
Dr. Trolice is director of Fertility CARE – The IVF Center in Winter Park, Fla., and professor of obstetrics and gynecology at the University of Central Florida, Orlando. He has no conflicts of interests. Please contact him at obnews@mdedge.com.