Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 1131: In choledochal cyst, the most common type is:

A. Type 1 (Correct Answer)
B. Type 2
C. Type 4
D. Type 4A

Explanation: ***Type 1*** - **Type 1 choledochal cysts** account for the vast majority, approximately **80-90%**, of all choledochal cyst cases. - This type is characterized by a **fusiform or cystic dilation** of the common bile duct. *Type 2* - **Type 2 choledochal cysts** are relatively rare, presenting as a **diverticulum** arising from the common bile duct. - This morphology is distinctly different from the more common diffuse or localized enlargements. *Type 4* - The classification of Type 4 includes both **intrahepatic** and **extrahepatic** duct dilations. - While it represents a significant proportion of the remaining cases, it is less common than Type 1. *Type 4A* - **Type 4A** is a specific subtype within the Type 4 classification, involving **multiple intrahepatic and extrahepatic cysts**. - Its incidence is lower than the overall Type 4 category, making it far less common than Type 1.

Question 1132: Dohlman's procedure is primarily indicated for which of the following conditions?

A. Achalasia
B. Meckel's diverticulum
C. Esophageal cancer
D. Zenker's diverticulum (Correct Answer)

Explanation: ***Zenker's diverticulum*** - **Dohlman's procedure** is an **endoscopic diverticulotomy** specifically designed for Zenker's diverticulum. - This procedure involves dividing the **cricopharyngeus muscle** and the common wall between the esophagus and the diverticulum. *Meckel's diverticulum* - This is a **congenital outpouching of the small intestine** and its treatment involves surgical resection, not Dohlman's procedure. - It is typically asymptomatic but can present with bleeding, obstruction, or inflammation. *Achalasia* - Achalasia is a motility disorder of the esophagus characterized by failure of the **lower esophageal sphincter (LES)** to relax and loss of peristalsis. - Treatment options include **Heller myotomy** or endoscopic balloon dilation, not Dohlman's procedure. *Esophageal cancer* - Treatment of esophageal cancer typically involves **esophagectomy**, chemotherapy, and radiation therapy. - Dohlman's procedure is not indicated for the management of esophageal malignancy.

Question 1133: Which of the following is a true statement about Meckel's diverticulum?

A. It is found on the mesenteric side of the ileum
B. It is located on the antimesenteric side of the ileum. (Correct Answer)
C. Meckel's diverticulum is always associated with Littre's hernia
D. It is a false diverticulum formed by mucosal herniation

Explanation: ***It is located on the antimesenteric side of the ileum.*** - Meckel's diverticulum is a **true diverticulum** located on the **antimesenteric border** of the ileum, typically within 100 cm of the ileocecal valve. - This anatomical position is characteristic and helps differentiate it from other intestinal anomalies. - It contains all layers of the bowel wall, distinguishing it from false diverticula. *It is a false diverticulum formed by mucosal herniation* - This statement is **incorrect** because Meckel's diverticulum is a **true diverticulum**, not a false one. - A true diverticulum contains **all three layers** of the bowel wall (mucosa, submucosa, and muscularis propria), unlike false diverticula which only involve mucosa and submucosa herniating through the muscular layer. - Meckel's diverticulum is a remnant of the **omphalomesenteric duct** (vitellointestinal duct) and often contains heterotopic gastric or pancreatic tissue. *It is found on the mesenteric side of the ileum* - This statement is incorrect as Meckel's diverticulum is characteristically found on the **antimesenteric side** of the ileum. - Its antimesenteric location is a key distinguishing feature and helps in surgical identification. *Meckel's diverticulum is always associated with Littre's hernia* - While it is possible for a Meckel's diverticulum to be present within a **hernia sac** (Littre's hernia), this association is **not always** present. - Littre's hernia is a specific type of hernia where a Meckel's diverticulum is contained within the hernia sac, but most Meckel's diverticula do not present as part of a hernia.

Question 1134: Zenker's diverticulum is also known as

A. Pharyngobasilar diverticulum
B. Pharyngotympanic diverticulum
C. Hypopharyngeal diverticulum (Correct Answer)
D. Prepharyngeal diverticulum

Explanation: ***Hypopharyngeal diverticulum*** - Zenker's diverticulum is a **pulsion diverticulum** located in the **posterior hypopharynx**, specifically in Killian's triangle. - Due to its anatomical location, it is accurately termed a hypopharyngeal diverticulum, forming a pouch of mucosa and submucosa through a weakness in the cricopharyngeal muscle. *Pharyngobasilar diverticulum* - This term is not typically used to describe Zenker's diverticulum. - The diverticulum is located lower in the pharynx, not near the pharyngeal or skull base. *Pharyngotympanic diverticulum* - This term is anatomically incorrect as it implies a connection or proximity to the tympanic cavity (middle ear). - Zenker's diverticulum is located in the pharynx and has no direct relation to the ear. *Prepharyngeal diverticulum* - The term "prepharyngeal" might suggest a location anterior to the pharynx. - Zenker's diverticulum is a posterior diverticulum, protruding dorsally from the pharynx.

Question 1135: What is the investigation of choice for dysphagia for solids?

A. C.T. Scan
B. Barium swallow
C. X-ray chest
D. Endoscopy (Correct Answer)

Explanation: ***Endoscopy*** - **Endoscopy** is the investigation of choice for dysphagia for solids because it allows direct visualization of the esophageal lumen and mucosa. - It enables the physician to identify and biopsy structural abnormalities such as strictures, tumors, or inflammation, which are common causes of dysphagia for solids. - Provides therapeutic options (dilation, stent placement) in the same sitting. *X-ray chest* - An **X-ray chest** can detect gross abnormalities like large masses or significant mediastinal widening but offers limited detail of the esophageal lumen. - It cannot reliably identify more subtle mucosal lesions or functional disorders leading to dysphagia. *C.T. Scan* - A **CT scan** provides cross-sectional images of the chest and mediastinum, useful for assessing extrinsic compression or advanced malignancies. - However, it is less sensitive for evaluating intrinsic esophageal mucosal abnormalities or differentiating between various causes of dysphagia compared to endoscopy. *Barium swallow* - A **barium swallow** is a radiological study that can demonstrate the contour and patency of the esophagus, especially useful for identifying strictures, webs, or diverticula. - While helpful as an initial investigation, it is a functional study and does not allow for direct visualization or tissue biopsy, which are often necessary for a definitive diagnosis of dysphagia for solids.

Question 1136: In sepsis due to cholecystitis, which is the initial anatomical structure typically involved?

A. Left lobe of liver
B. Hepatic portal vein & IVC
C. Quadrate lobe of liver (Correct Answer)
D. Right lobe of liver

Explanation: ***Quadrate lobe of liver*** - The **gallbladder fossa** is located on the visceral surface of the liver, directly bordered by the **quadrate lobe** (Couinaud segment IV). - In cases of cholecystitis progressing to sepsis with hepatic involvement, the **quadrate lobe** is the initial anatomical structure affected due to its **direct anatomical contact** with the gallbladder. - Pericholecystic inflammation and abscess formation typically extend first into the quadrate lobe parenchyma before involving other hepatic segments. *Right lobe of liver* - While the gallbladder is anatomically related to the right lobe, the **quadrate lobe** (though functionally part of the left hepatic territory) is the structure in **immediate contact** with the gallbladder fossa. - The right lobe proper (segments V-VIII) may be involved subsequently, but it is not the **initial** site of direct inflammatory spread. *Hepatic portal vein & IVC* - The **hepatic portal vein** and **inferior vena cava (IVC)** are not in direct anatomical contact with the gallbladder. - These vascular structures may be affected in advanced stages through septic thrombophlebitis (**pylephlebitis**) or hematogenous spread, but not as the **initial** anatomical site of local extension. *Left lobe of liver* - The **left lobe** (segments II and III) is anatomically distant from the gallbladder, separated by the falciform ligament and other structures. - It would not be the initial site of direct inflammatory spread from cholecystitis.

Question 1137: What is the most common indication for surgery in patients with Crohn's disease?

A. Fistulas
B. Intestinal obstruction (Correct Answer)
C. Malignancy
D. Perforation

Explanation: ***Intestinal obstruction*** - **Intestinal obstruction due to strictures** is the most common indication for surgery in Crohn's disease, accounting for 40-70% of surgical interventions. - Chronic transmural inflammation leads to **fibrotic strictures** that cause recurrent obstructive symptoms including abdominal pain, distension, and vomiting. - When strictures become symptomatic and unresponsive to medical therapy or endoscopic balloon dilation, **surgical resection or stricturoplasty** becomes necessary. *Fistulas* - **Fistulas** are the second most common indication for surgery in Crohn's disease, occurring in 20-40% of surgical cases. - Complex fistulas (enterocutaneous, enterovesical, enterovaginal) often require surgical intervention when they are symptomatic or fail conservative management. - Internal fistulas may sometimes be managed conservatively if asymptomatic. *Perforation* - **Free perforation** is a serious but relatively rare complication of Crohn's disease requiring emergency surgery. - More commonly, Crohn's disease presents with contained perforations forming abscesses rather than free perforations. - Acute perforation represents only 1-2% of surgical indications. *Malignancy* - While patients with Crohn's disease have a slightly increased risk of **small bowel adenocarcinoma** and colorectal cancer, malignancy is a rare indication for surgery. - Surveillance and early detection programs aim to identify dysplasia before progression to invasive cancer. - Surgery for established malignancy represents less than 5% of operations in Crohn's disease patients.

Question 1138: Which of the following is not useful in the management of acute appendicitis?

A. Analgesics
B. IV fluids
C. Antibiotics
D. Purgation (Correct Answer)

Explanation: ***Purgation*** - **Purgation** (inducing vigorous bowel evacuation) is contraindicated in acute appendicitis as it can increase intraluminal pressure and potentially lead to **perforation** of the inflamed appendix. - Such aggressive bowel stimulation is harmful and offers no therapeutic benefit in managing appendicitis. *Antibiotics* - **Preoperative antibiotics** are crucial in acute appendicitis to cover potential bacterial contamination, especially in cases of suspected **perforation** or **gangrene**. - They help reduce the risk of **postoperative infections** and improve overall outcomes. *Analgesics* - **Analgesics** (pain relievers) are essential for managing the severe abdominal pain associated with acute appendicitis. - While traditionally withheld to avoid masking symptoms, it is now widely accepted that **adequate pain control** does not hinder diagnosis and improves patient comfort. *IV fluids* - Patients with acute appendicitis are often **dehydrated** due to anorexia, vomiting, and fever. - **Intravenous fluids** are critical to correct fluid and electrolyte imbalances, ensuring patient stability before and during surgery.

Question 1139: What is the medical term for the surgical procedure to remove the gallbladder?

A. Hernia repair
B. Cholecystectomy (Correct Answer)
C. Laparotomy
D. Appendectomy

Explanation: ***Cholecystectomy*** - This term directly translates to the **surgical removal of the gallbladder**, with "cholecyst-" referring to the gallbladder and "-ectomy" meaning surgical excision. - It is a common procedure performed for conditions like **gallstones (cholelithiasis)** or gallbladder inflammation (cholecystitis). *Appendectomy* - This procedure involves the **surgical removal of the appendix**, typically due to inflammation or infection (appendicitis). - It does not involve the gallbladder. *Hernia repair* - This is a surgical procedure to **correct a hernia** by repairing a weakness in the abdominal wall or other muscle layer. - It involves restoring displaced tissue to its proper position and reinforcing the weakened area, not removing an organ like the gallbladder. *Laparotomy* - This is a general surgical procedure involving a **large incision through the abdominal wall** to gain access to the abdominal organs. - It is an exploratory surgery or a preliminary step to perform other procedures, rather than the name of a specific organ removal.

Question 1140: All are true about Boerhaave's syndrome except:

A. Vomiting occurs against a closed glottis
B. Barotrauma
C. Vertical split in the gastric mucosa (Correct Answer)
D. Oesophagus bursts at its weakest point in the lower third

Explanation: ***Vertical split in the gastric mucosa*** - A vertical split in the gastric mucosa is characteristic of a **Mallory-Weiss tear**, not Boerhaave's syndrome. - Mallory-Weiss tears are typically **partial-thickness tears** at the gastroesophageal junction caused by forceful vomiting. *Oesophagus bursts at its weakest point in the lower third* - Boerhaave's syndrome specifically refers to a **full-thickness rupture of the esophagus**. - The rupture typically occurs in the **distal (lower) third of the esophagus**, which is considered its weakest point due to the lack of serosal layer. *Barotrauma* - The rupture in Boerhaave's syndrome is caused by a sudden, severe increase in intra-esophageal pressure from **forceful vomiting**. - This rapid rise in pressure against a closed glottis constitutes **barotrauma** to the esophageal wall. *Vomiting occurs against a closed glottis* - A key mechanism in Boerhaave's syndrome is the act of **retching or vomiting against a closed glottis**. - This action traps air and creates a massive intraluminal pressure surge, leading to the **esophageal rupture**.

Practice by Chapter

Esophageal Disorders

Practice Questions

Gastric Disorders

Practice Questions

Small Intestine Pathology

Practice Questions

Appendicitis

Practice Questions

Inflammatory Bowel Disease

Practice Questions

Intestinal Obstruction

Practice Questions

Gastrointestinal Bleeding

Practice Questions

Diverticular Disease

Practice Questions

Anorectal Disorders

Practice Questions

Colorectal Neoplasms

Practice Questions

Gastrointestinal Stomas

Practice Questions

Bariatric Surgery Principles

Practice Questions

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