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Mucocele of the appendix: what to expect
Sofia Frade Santos1, Mariana Horta1,2, Filipa Rosa1
1Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), Lisboa, Portugal.
Abstract:
Mucoceles of the appendix are rare and can have quite variable imaging and clinical presentations, sometimes mimicking an adnexal mass. The underlying cause can be neoplastic or non-neoplastic. The typical imaging appearance of a mucocele of the appendix is that of a cystic structure with a tubular morphology. This structure is defined by having a blind-ending and being contiguous with the cecum. Radiologists should be familiar with key anatomical landmarks and with the various imaging features of mucoceles of the appendix, in order to provide a meaningful differential diagnosis of a lesion in the right lower abdominal quadrant. In addition, a neoplastic mucocele can rupture, resulting in pseudomyxoma peritonei, which will change the prognosis dramatically. Therefore, prompt diagnostic imaging is crucial.
Insights
Appendiceal mucoceles are rare cystic masses that can mimic other conditions. Prompt diagnostic imaging is crucial for accurate diagnosis and to identify potential rupture leading to pseudomyxoma peritonei.
Area of Science:
- Radiology
- Gastroenterology
- Oncology
Background:
- Appendiceal mucoceles are uncommon cystic lesions of the appendix.
- They present with variable clinical and imaging findings, sometimes mimicking adnexal masses.
- Causes can be neoplastic or non-neoplastic.
Purpose of the Study:
- To highlight the typical imaging features of appendiceal mucoceles.
- To emphasize the importance of recognizing these features for differential diagnosis.
- To underscore the critical role of prompt imaging in identifying potential complications like pseudomyxoma peritonei.
Main Methods:
- Review of imaging characteristics of appendiceal mucoceles.
- Discussion of differential diagnoses for right lower quadrant lesions.
- Emphasis on anatomical landmarks and imaging features.
Main Results:
- The typical imaging appearance is a cystic, tubular structure contiguous with the cecum.
- Variable presentations can mimic other pathologies, including adnexal masses.
- Rupture of neoplastic mucoceles can lead to pseudomyxoma peritonei with significant prognostic implications.
Conclusions:
- Familiarity with appendiceal mucocele imaging is essential for radiologists.
- Accurate diagnosis and prompt imaging are crucial for patient management.
- Distinguishing neoplastic from non-neoplastic causes impacts prognosis, especially regarding pseudomyxoma peritonei risk.
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