Mucocele of the appendix is a term used to describe a dilated, mucin-filled appendix. It is most commonly the result of epithelial proliferation, but can be caused. Appendiceal mucoceles occur when there is an abnormal accumulation of mucin causing abnormal distention of the vermiform appendix due to various. Appendiceal Mucocele: A Diagnostic Dilemma in Differentiating Malignant From Benign Lesions With CT. Hao Wang1, Yong-Qi Chen2, Ran Wei1, Qing-Bing.

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Most cases were asymptomatic and, in particular, clinical presentation as acute appendicitis was rare, at variance with what has been reported by others.

The bowel adenocarcinoma is always submitted to right colectomy because the incidence of lymphatic dissemination is high in this type of tumor Thus, the initial surgery should be as minimal as possible, in order to keep the peritoneum intact 23, We treated some patients with P32 after debridement, and intraperitoneal injection of 5-FU and so forth.

We present the case when the 2 diseases were not differentiated before surgery and appendiceal mucocele was diagnosed intraoperatively.

However, if it is an adenocarcinoma of the intestine, or if the lymph nodes are positive as to malignity at the frozen section, right colectomy is performed at the initial surgery.

Mucocele of the Appendix: Case Report and Review of Literature

It is uncommon, with are ported incidence of 0. Treatment of primary colon cancer with peritoneal carcinomatosis: The onion skin sign: However, when the patient undergoes colonoscopy at the preoperative and a malignant neoplasm is diagnosed in the cecum, or if a cecal tumor is noticed, right colectomy is the first choice.


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Imaging shows a typical thin-walled, cystic-appearing, enlarged appendix. This is one of the most common surgical diseases. An algorithm for the selection of the type of surgery has been furnished by Dhage-Ivatury and Sugarbaker.

Ruptured giant mucocele of the appendix with pseudomyxoma peritonei

If the histological appendcieal points to bowel or mucinous adenocarcinoma, carcinoid or adenocarcinoid tumors larger than 2. I believe that it will be a reference series that surgeons will use for years to come because of its size.

Mucus cytology should be immediately performed, because the result will define surgical therapy. Dis Colon Rectum ;38 8: Mucinous neoplasms of the appendix are classified on a spectrum from benign to malignant based upon certain features during histologic examination.

Appendiceal Mucocele: Benign or Malignant?

In a retrospective review study of Esquivel and Sugarbaker the most common initial symptom of patients with pseudomyxoma peritonei was appendicitis; nevertheless in none of these cases did the appendicitis occur as a first event of the dissemination [ 22 ].

CT reveals a low attenuation, well-encapsulated mass with smooth regular walls and displacement of adjacent bowel loops. Dis Colon Rectum ;48 7: Low-grade and high-grade PMP are synonymous to disseminated peritoneal adenomucinosis and peritoneal mucinous carcinomatosis, respectively. The histopathological examination revealed micocele low-grade mucinous appendiceal neoplasm with negative regional lymph nodes.

There is no such risk in simple mucocele, since there are no epithelial cells in the mucus. Taking into consideration the size of the lesion, the possibility of a malignant neoplasm and the prospective of an emergency right hemicolectomy in an elder patient, the open approach was decided.

World J Surg ;31 3: In older patients a preoperative diagnosis by computed tomography CT scan is more probable, which appdndiceal easily detect the AM or even pseudomyxoma peritonei [ 8 ]. Colonoscopic diagnosis of mucocele of the appendix.


Surgical Treatment of Appendiceal Mucocele

In the previous study that I referenced, the patients with appendiceal carcinoma clearly did dramatically better if they had right hemicolectomy even as a secondary procedure, than if a simple appendectomy was aplendiceal. The appendix epithelium contains many goblet cells and thus the accumulation of mucus is a typical finding. Case 8 Case 8.

Patients with perforated AM in the initial surgery but with negative lymph nodes or margins in the histological diagnosis should not be submitted for a right hemicolectomy as they present lower survival rates when compared to those who only had an appendectomy at the time of the primary surgery [ 41 ]. The rupture of the appendix may lead to the dissemination of the epithelium that produces mucins in the abdominal cavity, causing mucinous ascites or pseudomyxoma peritonei.

This conduct is different from the primary colon cancer with peritoneal carcinomatosis, in which the results are better when the definite conduct is performed at the initial surgery No further surgical therapy was required. Appendicael age of the patient and the large appendiceal mass put a high suspicion of malignancy. Follow-up of patients treated by cytoreduction and chemotherapy for peritoneal carcinomatosis of colorectal origin.

In these cases it is important to consider every mucocele of the appendix as malignant [ 7 ]. Anything with firmness at the base certainly deserves excision.