Abstract
Appendiceal endometriosis (AE) represents a clinically significant yet frequently overlooked manifestation of endometriosis that may contribute
to persistent symptoms and suboptimal treatment outcomes. Multiple comprehensive reviews demonstrate that appendiceal involvement
occurs in a notable percentage of women with endometriosis and can present with distinctive symptom patterns. Despite this growing
body of evidence, routine appendiceal evaluation during surgical exploration for endometriosis remains inconsistently implemented across
surgical practices. The failure to identify and treat AE may result in continued symptomatology despite otherwise successful endometriosis
surgery, potentially necessitating additional interventions and compromising patient quality of life.
Keywords
Endometriosis, Appendicitis, Appendiceal endometriosis, Dysmenorrhea, Primary dysmenorrhea, Implementation, Chronic
pelvic pain
Levine EM, Fernandez CM, Tam T. Comprehensive Management of Endometriosis: Implementation from Research to
Clinical Practice. Arch Obstet Gynecol. 2025;6(2):82–84.
Arch Obstet Gynecol. 2025
Volume 6, Issue 2
83
surgery may reduce the need for subsequent interventions
and improve overall patient satisfaction by providing better
symptom relief [9].
Review of Current Data Regarding Endometriosis and
the Appendix
An investigation involving the sonographic identification
of deep infiltrating endometriosis (DIE) also identified cases
of AE. In this study, gynecologic physicians collaborated to
verify the presence of DIE through sonographic, surgical, and
histological assessments [10]. AE was coincidentally identified
in five of the seven cases (71%) in which appendectomy was
performed (total of 5% of the 100 cases of DIE examined), with
endometriotic implants affecting the appendix in five cases,
though ultrasound did not detect AE in any of those cases
preoperatively. Histologic evidence of endometriosis depends
on finding at least two of the three associated elements (i.e.
endometrial glands, stroma, and hemosiderin deposits) [11]. In
each AE case from this series, all three elements were present
but none of the operative reports indicated any specific signs
of appendicitis.
Multiple studies across diverse patient populations have
documented significant rates of AE. Ross and colleagues
examined 609 women with CPP who underwent
appendectomy and found histopathologic evidence of AE in
14.9% of cases [4]. Similarly, Nikou et al. studied 135 patients
with clinically diagnosed endometriosis who had concurrent
appendectomy, revealing AE in 25% of cases despite the
absence of consistent preoperative indicators [5]. Guo et al.
reported that among 108 patients with Stage IV endometriosis,
35.8% of those who had an appendectomy had evidence of AE
[6]. Centini et al. found a lower prevalence of 2.8% among 486
patients undergoing surgery for presumptive endometriosis
[7]. Collectively, these studies demonstrate that AE occurs
in 2.8% to 35.8% of cases, with prevalence rates varying
according to patient selection criteria and disease severity.
Additionally, Schrempf et al. evaluated 2,484 patients
admitted for acute appendicitis without known endometriosis
history and identified histologic evidence of AE in 0.7% of
cases, suggesting that AE may occur even in the absence
of recognized pelvic endometriosis [12]. This finding is
supported by multiple case reports demonstrating that AE
can present with acute symptomatology that closely mimics
classic appendicitis, potentially leading to misdiagnosis [13–
15]. Importantly, Ross and colleagues emphasized that the
detection rate of AE is significantly influenced by the rigor and
methodology of histopathologic examination, suggesting
that AE may be underdiagnosed when standard pathologic
protocols are employed [16]. A comprehensive review and
analysis of AE was provided by Mabrouk et al. [17] and by
Allahqoli et al. [18], further highlighting the clinical relevance
of AE.
Surgical intervention for endometriosis occurs either for
diagnostic confirmation when the diagnosis is uncertain
or medical therapy has failed, or for definitive treatment of
established disease. In diagnostic cases, histologic sampling
of suspicious implants or deep infiltrating endometriosis
is required, while therapeutic cases necessitate complete
removal of all endometriotic tissue. Current evidence strongly
supports concurrent appendectomy in both scenarios, as
AE frequently lacks visual manifestations and can only be
confirmed histologically. Multiple studies demonstrate
that prophylactic appendectomy adds minimal morbidity
during endometriosis surgery [5,6,18], with several authors
advocating for this approach in all cases of suspected or
confirmed endometriosis [7,15,16].
Endometriosis significantly impacts patients through
dysmenorrhea, chronic pelvic pain, and infertility, yet diagnosis
is frequently delayed by 5–12 years, contributing to patient
dissatisfaction and physician mistrust [19–23]. Misdiagnosis or
under-recognition of endometriosis’ various manifestations,
including peritoneal, ovarian, and deep infiltrating disease,
prolongs patient suffering and delays appropriate treatment.
Comprehensive interdisciplinary management is essential [24]
and should include recognition of frequently overlooked AE.
Clinical Implications of Collected Data
Recognizing and diagnosing AE is essential for ensuring that
patients receive appropriate medical and/or surgical treatment
to effectively alleviate associated symptoms. Criticism of
the less-than-ideal transferring of research findings toward
standard clinical practice has been previously offered, and
the slowness of adoption of this comprehensive management
of endometriosis may be a modern example of this failed
implementation. A thorough analysis of other past scientific
implementation problems was presented by Dr. Evans [25],
which may be relevant to this clinical review. The delay in
translating compelling scientific data into standard care
protocols may perpetuate suboptimal treatment outcomes
for patients with endometriosis.
Conflicts of Interest
The authors deny any conflicts of interest.
Funding
There was no funding for this investigation.
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