Gastrointestinal Surgery — MCQs

A 28-year-old previously healthy woman arrives in the emergency room complaining of 24 hours of anorexia and nausea, and lower abdominal pain that is more intense in the right lower quadrant than elsewhere. On examination, she has peritoneal signs in the right lower quadrant and a rectal temperature of 38.38°C (101.8°F). At exploration through an incision in the right lower quadrant, she is found to have a small, contained perforation of a cecal diverticulum. Which of the following statements regarding cecal diverticula is true?

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 1141: Which of the following statements is true about traction diverticulum of the esophagus?

A. It is not a true diverticulum
B. The outpouching is usually small and conical
C. May develop tracheoesophageal fistula
D. Produced due to the extraluminal forces (Correct Answer)

Explanation: ***Produced due to the extraluminal forces*** - **Traction diverticula** are caused by **external inflammatory forces** from scarring in the mediastinum (e.g., from **tuberculosis** or **histoplasmosis**) that pull on the esophageal wall, creating an outpouching. - This **extraluminal traction** is the **defining mechanism** that differentiates them from **pulsion diverticula**, which are caused by increased intraluminal pressure. - This is the **primary characteristic** of traction diverticula. *It is not a true diverticulum* - **Incorrect.** Traction diverticula are **true diverticula** because they involve **all layers of the esophageal wall** (mucosa, submucosa, and muscularis propria). - This is in contrast to **false (pulsion) diverticula** like Zenker's diverticulum, which only involve mucosa and submucosa herniating through a muscular defect. *The outpouching is usually small and conical* - **Incorrect.** Traction diverticula are typically **broad-based** and **triangular or tent-shaped**, not small and conical. - Their wide mouth and broad connection to the esophageal lumen allow for better drainage, resulting in fewer symptoms compared to narrow-necked pulsion diverticula. *May develop tracheoesophageal fistula* - While this statement is **technically true**, it describes a **rare complication** rather than a characteristic feature. - Tracheoesophageal fistula can occur when the inflammatory process that caused the traction diverticulum (e.g., **mediastinal granulomatous disease**) erodes into adjacent structures. - However, this is **not a defining feature** of traction diverticula, making Option D the better answer as it identifies the fundamental mechanism of formation.

Question 1142: In the context of gastric resections, which procedure is associated with a greater risk of developing anemia?

A. Billroth II (Correct Answer)
B. Billroth I
C. Both procedures have equal effects on anemia.
D. Neither procedure affects anemia.

Explanation: ***Billroth II*** - The Billroth II procedure involves creating a **gastrojejunostomy** that **bypasses the duodenum**, which is the primary site for **iron absorption**. This anatomical alteration significantly impairs iron uptake, leading to **iron deficiency anemia**. - Additionally, the blind loop (afferent limb) formed in Billroth II reconstruction can lead to **bacterial overgrowth**, which consumes **vitamin B12** and interferes with **intrinsic factor**, resulting in **megaloblastic anemia** (pernicious anemia). - The bypass of the duodenum also reduces exposure to **pancreatic enzymes** and **bile**, further compromising nutrient absorption. *Billroth I* - The Billroth I procedure involves a **gastroduodenostomy**, reconnecting the stomach directly to the **duodenum**, thereby preserving the normal anatomical pathway for digestion. - This maintains exposure to the duodenum where **iron absorption** primarily occurs and preserves better access to **intrinsic factor-B12 complex** absorption in the terminal ileum. - While some degree of malabsorption may occur due to reduced gastric reservoir and altered acid production, the risk of **anemia** is significantly lower compared to Billroth II. *Both procedures have equal effects on anemia* - This is incorrect because the anatomical reconstructions differ fundamentally. Billroth II **bypasses the duodenum** (critical for iron absorption), while Billroth I **preserves duodenal passage**. - The blind loop syndrome and bacterial overgrowth are specific complications of Billroth II, not Billroth I, making the anemia risk distinctly higher in Billroth II. *Neither procedure affects anemia* - This is incorrect. Any gastric resection alters the normal physiology of digestion and absorption, increasing the risk of nutritional deficiencies. - Both procedures reduce **gastric acid production** (needed for iron solubilization) and may affect **intrinsic factor** secretion (needed for B12 absorption), though Billroth II has substantially greater impact due to duodenal bypass.

Question 1143: When a spontaneous perforation of the esophagus occurs as a result of severe barotrauma while a person vomits against a closed glottis, what is this condition known as?

A. Mallory-Weiss syndrome
B. Plummer-Vinson syndrome
C. Boerhaave's syndrome (Correct Answer)
D. Kallmann syndrome

Explanation: ***Boerhaave's syndrome*** - This syndrome is characterized by a **spontaneous transmural esophageal rupture** due to a sudden increase in intraesophageal pressure, typically caused by **severe retching or vomiting** against a closed glottis. - It's a medical emergency often associated with **chest pain**, **dyspnea**, and in some cases, **subcutaneous emphysema**. *Mallory-Weiss syndrome* - This involves **longitudinal mucosal tears** at the gastroesophageal junction, also caused by severe vomiting or retching, but it does not involve a full-thickness rupture. - It usually presents with **hematemesis** (vomiting blood) and is less severe than Boerhaave's syndrome. *Plummer-Vinson syndrome* - This is a rare condition characterized by **dysphagia**, **iron-deficiency anemia**, and **esophageal webs**. - It is not directly related to esophageal perforation or vomiting. *Kallmann syndrome* - This is a genetic condition characterized by **anosmia** (inability to smell) and **hypogonadotropic hypogonadism**, leading to delayed or absent puberty. - It is an endocrine disorder and has no association with esophageal conditions.

Question 1144: Parastomal hernia is most frequently seen with:

A. End colostomy (Correct Answer)
B. Loop colostomy
C. End ileostomy
D. Loop ileostomy

Explanation: ***End colostomy*** - **End colostomies** are associated with the highest rates of parastomal hernias due to the larger fascial defect and often larger bowel segments brought through the abdominal wall, creating a wider potential space for herniation. - The permanent nature of an end colostomy means a longer duration of exposure to factors contributing to hernia formation, such as increased abdominal pressure and fascial weakening. *Loop colostomy* - While loop colostomies can develop parastomal hernias, their incidence is generally lower than with end colostomies due to the typically smaller fascial defect created for a loop. - **Loop colostomies** are often temporary, reducing the long-term exposure to risk factors for hernia development compared to permanent stomas. *End ileostomy* - **End ileostomies** have a lower incidence of parastomal hernias compared to colostomies because the small bowel mesentery is less bulky, and the fascial opening required is typically smaller. - The contents of an ileostomy are less solid and generally exert less pressure on the fascial opening than colostomy contents. *Loop ileostomy* - **Loop ileostomies**, similar to loop colostomies, are often temporary and involve a relatively small fascial defect, contributing to a lower risk of parastomal hernia compared to permanent stomas. - The infrequency of parastomal hernias in loop ileostomies is also attributed to the typically smaller bowel segment brought through the abdominal wall and its temporary nature.

Question 1145: On the 5th postoperative day after laparoscopic cholecystectomy, a 50-year-old lady presented with right upper quadrant pain, fever, and a 12-cm subhepatic collection on CT. What is the best management option for this patient?

A. Endoscopic retrograde cholangiopancreatography (ERCP) with biliary drainage
B. Conservative management with observation
C. Surgical repair of the cystic duct
D. Percutaneous drainage of the collection (Correct Answer)

Explanation: ***Percutaneous drainage of the collection*** - A 12-cm subhepatic collection with **right upper quadrant pain** and **fever** strongly suggests an **abscess** or **biloma**, which requires urgent drainage. - **Percutaneous drainage** is the least invasive and most effective immediate treatment for a localized, symptomatic fluid collection post-cholecystectomy. - This provides both diagnostic information (culture, bilirubin level) and therapeutic relief. *Conservative management with observation* - This patient presents with signs of **sepsis** (fever, pain) and a large fluid collection, indicating an active inflammatory or infectious process. - **Observation alone** would be inappropriate and could lead to worsening infection, sepsis, and potential rupture of the collection. *Endoscopic retrograde cholangiopancreatography (ERCP) with biliary drainage* - **ERCP** is indicated when there is a suspicion of a **bile duct injury** or **leak** that requires decompression or stenting. - While ERCP may be performed **after or alongside** percutaneous drainage if a bile leak is confirmed (to reduce biliary pressure and promote healing), the **immediate priority** for a large, symptomatic collection is drainage of the collection itself. - Percutaneous drainage addresses the acute problem (sepsis from collection) while ERCP addresses the underlying cause (bile leak, if present). *Surgical repair of the cystic duct* - **Surgical repair** would be considered if there was a confirmed **major bile duct injury** or **cystic duct stump leak** that cannot be managed endoscopically or percutaneously. - This is a more invasive approach and is not typically the first-line management for a large, symptomatic subhepatic collection, which usually requires initial drainage.

Question 1146: What is the commonest type of mesenteric cyst?

A. Dermoid
B. Urogenital remnant
C. Enterogenous
D. Chylolymphatic (Correct Answer)

Explanation: ***Chylolymphatic*** - **Chylolymphatic cysts**, also known as lymphatic cysts, are the most prevalent type of mesenteric cyst, accounting for a majority of cases. - These cysts arise from congenital malformations of the lymphatic system, leading to the accumulation of **chyle** within their walls. *Enterogenous* - **Enterogenous cysts** originate from duplications of the gastrointestinal tract and are lined by mucosa, representing a distinct but less common type. - Although frequently encountered in childhood, they are not the most common overall type of mesenteric cyst. *Dermoid* - **Dermoid cysts** are germ cell tumors that contain various mature tissues such as skin, hair follicles, and sebaceous glands, reflecting their pluripotential origin. - While they can occur in various locations, they are rare as primary mesenteric cysts. *Urogenital remnant* - **Urogenital remnant cysts** are extremely rare and result from the persistence of embryonic urogenital structures within the mesentery. - Their incidence is significantly lower compared to chylolymphatic cysts.

Question 1147: Most common site for carcinoid tumor in the abdomen is which of the following?

A. Liver
B. Pancreas
C. Appendix (Correct Answer)
D. Intestines

Explanation: ***Appendix*** - The **appendix** is the most common site for carcinoid tumors in the abdomen, accounting for approximately **35-40%** of all gastrointestinal carcinoid tumors. - These tumors are typically **small (<1 cm)**, found **incidentally** during appendectomy, and have an **excellent prognosis**. - Most appendiceal carcinoids are located at the **tip of the appendix** and rarely metastasize when small. *Intestines (Small Intestine)* - The small intestine, particularly the **ileum**, is the second most common site, accounting for **20-30%** of GI carcinoids. - Small intestinal carcinoids are more **clinically significant** as they are more likely to be **larger**, **symptomatic**, and cause **metastasis**. - These are more commonly associated with **carcinoid syndrome** due to their higher metastatic potential. *Liver* - The liver is the most common site for **metastasis** from carcinoid tumors but is **rarely a primary site**. - Liver metastases allow hormones to bypass hepatic first-pass metabolism, leading to **carcinoid syndrome** (flushing, diarrhea, bronchospasm). *Pancreas* - Pancreatic neuroendocrine tumors (PNETs) are a distinct subgroup but are **less common** than appendiceal or small intestinal carcinoids. - PNETs can be **functional** (insulinoma, gastrinoma, VIPoma) or **non-functional**, with varying clinical presentations.

Question 1148: Which of the following is NOT a contraindication for laparoscopic cholecystectomy?

A. Patients with severe liver cirrhosis and portal hypertension
B. Patients with obesity (Correct Answer)
C. Patients with a history of previous abdominal surgery
D. Patients with severe chronic obstructive pulmonary disease (COPD)

Explanation: ***Patients with obesity*** - **Obesity** is not a contraindication for laparoscopic cholecystectomy and is actually often considered a **relative indication** for the laparoscopic approach over open surgery. - Laparoscopic cholecystectomy in obese patients offers significant advantages including reduced wound complications, decreased infection rates, better cosmesis, and faster recovery. - While technically more challenging due to thicker abdominal wall and increased intra-abdominal fat, experienced surgical teams routinely perform laparoscopic cholecystectomy in obese patients safely. *Patients with severe liver cirrhosis and portal hypertension* - **Severe liver cirrhosis and portal hypertension** are considered absolute or strong contraindications due to significantly increased risk of bleeding from dilated collateral vessels and impaired coagulation. - Pneumoperitoneum can further compromise hepatic blood flow and worsen portal hypertension. - These patients often require open surgery with careful hemostasis or medical management due to prohibitively high operative risk. *Patients with severe chronic obstructive pulmonary disease (COPD)* - Patients with **severe COPD** with poor pulmonary reserve may have difficulty tolerating pneumoperitoneum due to increased intrathoracic pressure, reduced diaphragmatic excursion, and decreased ventilation-perfusion matching. - Hypercarbia from CO₂ absorption and increased airway pressures can lead to significant respiratory compromise in patients with limited pulmonary reserve. - While mild-moderate COPD is not a contraindication with appropriate anesthetic management, severe COPD with inability to tolerate pneumoperitoneum constitutes a contraindication. *Patients with a history of previous abdominal surgery* - A history of **previous abdominal surgery** is considered at most a **relative contraindication**, not an absolute one, and is routinely managed in modern laparoscopic practice. - While intra-abdominal adhesions may increase technical difficulty and risk of bowel injury, techniques like open Hassan port insertion and careful adhesiolysis allow safe laparoscopic surgery in most cases. - Previous surgery requires careful preoperative assessment and may necessitate modified port placement or conversion to open if dense adhesions are encountered, but does not preclude attempting laparoscopy.

Question 1149: If the caecum is involved as a part of the wall of the hernial sac and is not its content, then it will be known as:

A. Spigelian hernia
B. Richter's hernia
C. Femoral hernia
D. Sliding hernia (Correct Answer)

Explanation: ***Sliding hernia*** - A **sliding hernia** occurs when a retroperitoneal organ, such as the **cecum** or sigmoid colon, forms a portion of the **hernial sac wall** rather than being a mere content within it. - This anatomical arrangement makes reduction of the hernia more complex due to the direct involvement of the organ in the sac's structure. *Richter's hernia* - A **Richter's hernia** involves only a portion of the **circumference of the bowel wall** becoming entrapped in the hernia sac, not the entire lumen. - This type of hernia can lead to strangulation without complete bowel obstruction, making diagnosis challenging. *Spigelian hernia* - A **Spigelian hernia** occurs through a defect in the **Spigelian fascia**, which is the aponeurotic layer between the rectus abdominis muscle and the semilunar line. - It typically presents as a reducible lump often below the arcuate line and is not characterized by an organ forming part of the sac wall. *Femoral hernia* - A **femoral hernia** protrudes through the **femoral canal**, inferior to the inguinal ligament. - It is more common in women and carries a higher risk of strangulation compared to inguinal hernias but does not involve an organ as part of the sac wall itself.

Question 1150: A 28-year-old previously healthy woman arrives in the emergency room complaining of 24 hours of anorexia and nausea, and lower abdominal pain that is more intense in the right lower quadrant than elsewhere. On examination, she has peritoneal signs in the right lower quadrant and a rectal temperature of 38.38°C (101.8°F). At exploration through an incision in the right lower quadrant, she is found to have a small, contained perforation of a cecal diverticulum. Which of the following statements regarding cecal diverticula is true?

A. Diverticulectomy, closure of the cecal defect, and appendectomy may be indicated. (Correct Answer)
B. Cecal diverticula are often solitary but rarely require surgical intervention.
C. Cecal diverticula are typically acquired pseudodiverticula like sigmoid diverticula.
D. Cecal diverticula are pseudodiverticula that commonly present with perforation.

Explanation: **Diverticulectomy, closure of the cecal defect, and appendectomy may be indicated.** - In cases of **perforated cecal diverticulitis**, surgical management often involves **diverticulectomy** to remove the inflamed diverticulum. - **Closure of the cecal defect** is necessary to prevent further leakage, and **appendectomy** is frequently performed concurrently to eliminate potential future diagnostic confusion given the similar presentation with appendicitis. - This is the **correct management** for the clinical scenario of a contained perforation. *Cecal diverticula are often solitary but rarely require surgical intervention.* - While cecal diverticula are often **solitary**, they frequently require surgical intervention when symptomatic or perforated as seen in this clinical scenario. - Symptomatic cecal diverticula, particularly those with **inflammation or perforation**, demand surgical management due to risks of complications like peritonitis. *Cecal diverticula are typically acquired pseudodiverticula like sigmoid diverticula.* - This is **incorrect**. Cecal diverticula are typically **congenital true diverticula** involving all layers of the bowel wall (mucosa, submucosa, and muscularis propria). - In contrast, sigmoid/colonic diverticula are **acquired pseudodiverticula** that contain only mucosa and submucosa herniating through the muscle layer. *Cecal diverticula are pseudodiverticula that commonly present with perforation.* - This is **incorrect**. Cecal diverticula are **true diverticula**, not pseudodiverticula, containing all layers of the intestinal wall. - While perforation can occur (as in this case), it is not a **common** presentation; most remain asymptomatic or present with inflammation mimicking appendicitis.

Practice by Chapter

Esophageal Disorders

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Gastric Disorders

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Small Intestine Pathology

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Appendicitis

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Inflammatory Bowel Disease

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Intestinal Obstruction

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Gastrointestinal Bleeding

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Diverticular Disease

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Anorectal Disorders

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Colorectal Neoplasms

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Gastrointestinal Stomas

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Bariatric Surgery Principles

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