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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...

Pyloric Obstruction

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...

Cholecystitis

Cholecystitis

Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...

Chronic Pancreatitis I: Introduction

Chronic Pancreatitis I: Introduction

The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...

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...

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Related Experiment Video

Updated: Apr 27, 2026

Laparoscopic Choledochal Cyst Excision and Roux-en-Y Choledochojejunostomy in Adults

Laparoscopic Choledochal Cyst Excision and Roux-en-Y Choledochojejunostomy in Adults

Published on: February 28, 2025

The disappearing abdominal mass: mesenteric pseudocyst.

Jasneet Singh Bhullar¹, Paraskevi Orfanou²

¹Department of Surgery, Providence Hospital and Medical Centers, 16001 West 9 Mile Road, Southfield, MI 48075, USA. drjsbhullar@gmail.com.

JSLS : Journal of the Society of Laparoendoscopic Surgeons

|June 25, 2014

Summary

Mesenteric pseudocysts are rare abdominal masses that can disappear and change location, posing diagnostic challenges. This case highlights the importance of considering mesenteric pseudocysts in the differential diagnosis of such elusive abdominal masses.

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Last Updated: Apr 27, 2026

Laparoscopic Choledochal Cyst Excision and Roux-en-Y Choledochojejunostomy in Adults

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

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Multimodality Diagnosis of Mesenteric Ischemia

Multimodality Diagnosis of Mesenteric Ischemia

Published on: July 21, 2023

Area of Science:

Gastroenterology
Surgical Pathology

Background:

Mesenteric pseudocysts are rare intra-abdominal cystic masses of unknown origin.
Incidence is approximately 1 in 100,000-250,000 hospital admissions.
Often present as a diagnostic challenge due to variable presentation, including migratory or disappearing masses.

Observation:

A 29-year-old woman presented with a 2-year history of a palpable abdominal mass that intermittently disappeared and changed location.
Initial computed tomography (CT) scan revealed a large cystic structure; CT-guided biopsy was inconclusive.
Diagnostic laparoscopy identified a mass originating from the jejunal mesentery.

Findings:

En bloc resection of the mesenteric mass was performed.
Histopathologic examination confirmed a rare diagnosis of mesenteric pseudocyst.
The mass was characterized as firm and arising from the jejunal mesentery.

Implications:

Mesenteric pseudocysts should be included in the differential diagnosis for patients with migratory or disappearing abdominal masses.
This case underscores the utility of diagnostic laparoscopy when non-invasive imaging and biopsies are inconclusive.
Accurate histopathological examination is crucial for diagnosing rare mesenteric pathologies.