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Appendicitis

Appendicitis

Appendicitis is an acute inflammatory condition of the vermiform appendix, most commonly caused by obstruction of its lumen. The appendix is a narrow, blind-ended pouch that extends from the cecum, making it particularly prone to obstruction. Causes include fecaliths, lymphoid hyperplasia (often after viral infections), parasites, tumors, or foreign bodies. This obstruction initiates a cascade of pathological changes.Luminal Obstruction and Early InflammationAfter obstruction, normal mucosal...

Diverticular Disease of the Colon

Diverticular Disease of the Colon

Diverticular disease involves the formation of diverticula—small sac-like outpouchings of the colonic wall—and their complications. It most commonly affects the sigmoid colon due to higher intraluminal pressure and structural vulnerability. It results from structural weakness and increased pressure in the colon, producing pseudodiverticula that may remain silent or progress to inflammation and serious complications.Structure of DiverticulaIn diverticulosis, these outpouchings are...

Appendicitis-I: Introduction

Appendicitis-I: Introduction

The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...

Assessment of the Rectum and Anus

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...

Peritoneum

Peritoneum

The peritoneum is a vital membrane that lines the abdominal cavity and covers most of the organs within it. It plays a crucial role in protecting the organs, providing a smooth surface for their movement, and facilitating various physiological processes. Understanding the anatomy and function of the peritoneum is essential for comprehending the complexities of the abdominal region.
Anatomy of the Peritoneum
The peritoneum is divided into two layers: the parietal peritoneum and the visceral...

Intestinal Obstruction II: Pathophysiology

Intestinal Obstruction II: Pathophysiology

Intestinal obstruction triggers a series of physiological responses, starting with gas and fluid accumulation in the bowel segment proximal to the obstruction, leading to distension. This distended intestine compresses the diaphragm, hindering lung expansion and potentially leading to reduced respiratory effort, atelectasis, and pneumonia.To overcome the blockage, the gut intensifies contractions, causing colicky abdominal pain, nausea, and vomiting, which reduces fluid and food intake and...

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Related Experiment Video

Updated: Jul 14, 2026

Murine Appendectomy Model of Chronic Colitis Associated Colorectal Cancer by Precise Localization of Caecal Patch

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Appendiceal mucocoeles and pseudomyxoma peritonei.

Anupam Dixit¹, John H P Robertson, Satvinder S Mudan

¹Colorectal Department, The London Clinic, 20 Devonshire Place, London W1G 6BW, United Kingdom. dixitanupam@hotmail.com

World Journal of Gastroenterology

|May 19, 2007

Summary

Appendiceal mucoceles, caused by mucus buildup, require accurate diagnosis and surgical resection. Rupture can lead to pseudomyxoma peritonei, necessitating careful management of both conditions.

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Culture and Imaging of Ex Vivo Organotypic Pseudomyxoma Peritonei Tumor Slices from Resected Human Tumor Specimens

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Published on: December 9, 2022

Area of Science:

Gastroenterology
Surgical Oncology

Background:

Appendiceal mucoceles result from appendiceal lumen obstruction, leading to mucus accumulation and dilatation.
Key etiologies include mucinous cystadenoma and cystadenocarcinoma, with implications for pseudomyxoma peritonei development.

Observation:

Presents two cases of appendiceal mucoceles.
Discusses clinical presentation, association with pseudomyxoma peritonei, and optimal management strategies.

Findings:

Accurate preoperative identification is crucial for effective surgical management.
Careful resection is the optimal approach for managing appendiceal mucoceles and preventing complications.

Implications:

Highlights the importance of distinguishing between benign and malignant mucinous appendiceal lesions.
Emphasizes the need for a comprehensive approach to managing mucoceles and preventing pseudomyxoma peritonei.