For many years the scientific literature has debated on the risks and benefits of these two surgical techniques.
Most of the visceral and hemorrhagic complications of hysterectomy appear to occur during, or as result, of the removal of the cervix during the procedure [3]
The benefits of total hysterectomy mainly concern the elimination of the risk of cancer, of bleeding and of pelvic pain linked to the maintenance of the cervix [2, 22].
The risk of cervical cancer in patients undergoing subtotal hysterectomy is not supported by scientific
evidence but for example a retrospective series [14] reported a risk of complications of the cervical stump and subsequent trachelectomy calculated up to 22%. There are several techniques for the ablation of the endocervical canal during subtotal hysterectomy, but there are no comparative studies to help surgeons understand which is the most effective. So, this topic needs further studies [7].
All the patients with an history of positive Pap-test or Hpv Dna test, should undergo total hysterectomy or should be strictly checked after surgery. It is necessary that patients understand the importance of respecting the screening program after surgery.
In our study, more women who underwent a subtotal hysterectomy regularly did PAP-test after surgery compared with women underwent total hysterectomy, only 49% (n = 38) continued cytologic exams of the
vaginal vault.
It is important to underline, however, that the USPSTF guidelines of 2003 and 2012 recommended not to
perform pap-test in women who underwent total hysterectomy for benign indications, since, although it is
recognized that they could still develop a vaginal tumor, this is rare, so screening is not indicated [24].
In subtotal hysterectomy persistent bleeding is usually related to the remaining endometrium left during the
procedure, endometriosis and adenomyosis. In total hysterectomy vaginal bleeding is usually due to atrophic
vaginitis, vaginal vault granulation, endometriosis of the vault, cervical stump cancer, infiltrating ovarian
tumors, estrogen secreting tumors in other parts of the body and rarely carcinoma of the fallopian [26].
Regarding this symptom, the incidence of post - supracervical hysterectomy bleeding is reported between 1
and 25% in literature, including abdominal and laparoscopic techniques [7] and numerous studies emphasize
how this increased significantly with subtotal hysterectomy compared to total [2, 6, 5, 17].
These data are confirmed in our study, in fact, in the months following surgery, the bleeding occurred in 21% (n = 18) of the subtotal hysterectomies and in 8% (n = 6) of the total and the difference was statistically significant (p = 0,015). The strength of the association is also supported by the value of the odds ratio and the wide confidence interval.
In favor of subtotal hysterectomy, however, a lower duration of the surgical act, less intra (bleeding) and postoperative complications and a shorter hospitalization, are globally recognized [2, 17].
Most of these differences can be applied mainly to the laparotomic approach and have not been demonstrated
in laparoscopy.
There are some controversies in the scientific world regarding the consequences of the removal/maintenance
of the cervix on intestinal, sexual, urinary function and on the possibility of developing pelvic prolapses.
Some argue that, maintaining the support structures of the uterus and the vagina (cardinal and
uterosacral ligaments) and causing less damage to nerves that innervate the vagina, bladder and
intestines, it is possible that subtotal hysterectomy may cause less intestinal, urinary and sexual
dysfunction.
About intestinal function, few data are present in literature. A prospective multicentric study of Roovers et al. [10] reports increased disturbances in the subtotal group but other studies underline non-significant differences between the two types of hysterectomy [8, 9] in accord with what emerges from our work, in which the alvus changes, manifested mainly in the form of constipation, weren’t significantly different between the two groups (p = 0,788).
From a study by Brown et al. [13] the chances of developing urinary incontinence after hysterectomy are
about 40% higher than in women who have not undergone hysterectomy. Conflicting results however
emerge from the analysis of the disorders in the different groups of patients.
Both the sympathetic and parasympathetic innervation reach the bladder through the pelvic plexus, the
cardinal ligament and, subsequently, the Frankenhauser plexus, as a result, the innervation is potentially
susceptible to secondary damage due to the paracervical dissection associated with total hysterectomy [6].
Moreover, subtotal hysterectomy has the theoretical advantage of not damaging the pelvic floor support [19].
A meta-analysis conducted by Robert et al. [19] showed no statistically significant differences in the risk of
developing urinary incontinence (both stress and urgency) in women who underwent supracervical
hysterectomy compared to women undergoing total abdominal hysterectomy. However, it has emerged that
all urinary symptoms are improved by hysterectomy.
Conflicting results emerged from a study of Gimbel et al of 2003 [17] in which, women underwent total
hysterectomy, less developed urinary incontinence compared to the subtotal.
Considering that it could take years for developing urinary incontinence after pelvic trauma, both neurological and anatomic, Greer et al. [7] assessed, in a multi-center study, urinary outcomes 9 years after hysterectomy and it revealed that participants continue to experience improvements and that there is no greater benefit of performing a subtotal hysterectomy than a total one, in the development of urinary symptoms.
From our data can be detected that 13% of patients undergoing subtotal hysterectomy and 15% of the total
complained of urinary incontinence, mainly in the form of stress incontinence (91% SCH and 58% TAH).
However, the difference between the two groups is not statistically significant (P = 0,822), so, the type of
intervention does not impact on the development of urinary incontinence, as in Robert et al's
study. [19].
About the increased risk of developing prolapse, the most recent literature does not detect statistically
significant differences between the groups, in contrast to what was previously asserted [2, 7].
The main problem of evaluation concerns the fact that prolapse, as previously emphasized with urinary
symptoms, may appear even years after hysterectomy and studies with long-term follow-up would be
required to assess whether the preservation of the cervix is translated into a better support of the vaginal
vault [2]. As a retrospective study carried out through a telephone survey, it was not possible to significantly
measure the real development of prolapse among our patients.
In the context of sexual disorders some studies have reported that women undergoing partial hysterectomy
have a better function and sexual satisfaction than those subjected to total hysterectomy [11, 16]. However,
different results have emerged from three prospective studies, and a retrospective one, in which there were no differences between the groups. In these studies, the perceived sexual function improved after hysterectomy independently of the technique [1, 8, 9, 10, 12, 23].
In two randomized clinical trials of Asnafi et al. [15] and Gimbel et al. (2003) [17], however, no improvement of dyspareunia was detected before and after surgery, while confirming the non-superiority of one technique over the other in post-hysterectomy sexual function disorders.
In our telephone interview, patients reported an improvement of pain and quality of intercourse in subtotal
hysterectomies compared to total with a statistically significant difference (p = 0,0159 and
p = 0.026).
It is important, however, to emphasize that the main dysfunctions of sex life are due to the estrogenic deficiency consequent to the removal of the ovaries.
Bilateral salpingo-ovariectomy is a preventive strategy to reduce the risk of epithelial ovarian cancer in women with a familiar history of ovarian carcinoma (BRCA1 or BRCA2 mutation carriers) after the completion of family project. The procedure drastically reduces the incidence of this pathology [25].
However, an ovariectomy in premenopausal women will induce menopause, which, in addition to the
symptoms of estradiol reduction (hot flashes and changes in sexual function), confers increased risk of
cardiovascular morbidity and osteoporosis (fractures) [26].
We have therefore decided to analyze the impact of salpingo-ovariectomy on our patients. Among the patients underwent subtotal hysterectomy, although a worsening of the quality of intercourses and the perception of pain and/or the sensation of a tight or shortened vagina wasn’t detected, a percentage increase of disturbance was underlined among bilateral salpingo-ovariectomy compared to salpingectomy alone. However, the difference between the two groups is not statistically significant, which can be ascribed to the small sample of salpingo-ovariectomy performed in subtotal hysterectomies.
Also, in the group of total hysterectomies, there has been an increased proportion of disorders in patients who underwent salpingo-ovariectomy compared with salpingectomy. In this case, however, the difference between the two groups is statistically significant.
Therefore, from our study, as in literature, emerges that, for premenopausal women without a family history
of ovarian carcinoma, the benefits of an oophorectomy at the time of hysterectomy for a benign indication
seem not to exceed the risks [27, 28], so, this procedure seems to be not recommended.
In general, our patients showed an improvement in the quality of life after the hysterectomy. As the review of Lethaby, et al. [2] emphasizes, in fact, in most studies, the quality of life is improved as a result of the
operation, regardless of the type of surgery.
However Munro, et al. underlined the possibility that the subtotal hysterectomy technique type performed has an impact on the result. For example, variations in the management of the cervical canal may have an impact on the future incidence of cervical cancer, or the degree of dissection of uterine vessels can influence the frequency and type of surgical complications. As a result, it may be useful to consider a classification system of subtotal hysterectomies when designing clinical evaluation studies of supracervical hysterectomies [3].
In conclusion, subtotal hysterectomy was superior to total hysterectomy for the improvement of sexual function, but it is more related to vaginal bleeding. There are no differences between the groups about intestinal function, bladder function and the development of other symptoms after surgery.
What emerges from our study is in agreement with other previous works [20],
independently of the techniques, hysterectomy leads to a substantial reduction of the main symptoms.
An important consideration is that hysterectomy is performed to improve quality of life rather than to treat
potentially lethal conditions. In fact, the most common indications are severe or irregular uterine bleeding,
uterine myomas and pelvic pain [1].
Although it is therefore benign pathology, a poll performed among American gynecologists in 2003 [18]
revealed that only 19.1% routinely offered their patients a choice between removal and preservation of the
cervix, and even less (17.8%) informed patients about the potential benefits and risks of both procedures.
For these reasons, the American College of Obstetricians and Gynecologists [21] stressed, in a consensus
opinion, that subtotal hysterectomy should not be recommended by the surgeon as superior to total
hysterectomy for benign diseases, and that women elected for surgery should therefore receive information
based on scientific data so that they can make a conscious choice, having an important role in the decisionmaking process.