Gastrointestinal Surgery Practice Questions

Q: A chest X-ray (CXR) of a patient is shown. What is the next step in management of this patient?

Exploratory laparotomy. ***Exploratory laparotomy*** - The chest X-ray shows **free air under the diaphragm** on the right side, indicating **pneumoperitoneum**. - **Pneumoperitoneum** usually signifies a **perforated abdominal viscus**, a surgical emergency requiring immediate exploration to identify and repair the perforation. *Ventilation perfusion scan* - This scan is primarily used to diagnose **pulmonary embolism** and is not indicated for the current finding. - The chest X-ray does not show any signs suggestive of pulmonary embolism, such as a **Westermark sign** or a **Hampton hump**. *Bronchoalveolar lavage* - **Bronchoalveolar lavage (BAL)** is a diagnostic procedure used to retrieve fluid from the lower respiratory tract for analysis, typically for infections or inflammatory conditions. - It would not be helpful in evaluating **subdiaphragmatic free air**, which is an abdominal issue. *High resolution CT scan* - While a **CT scan** could further characterize the pneumoperitoneum, the presence of clear free air on a plain film warrants **immediate surgical intervention** rather than further imaging, especially in an acute setting. - A CT scan might be considered if the diagnosis is equivocal, but in this case, the finding is unequivocal and indicates an emergency.

Q: What is the most appropriate surgical management for a patient with achalasia who has tried nonoperative therapies, including lifestyle modifications, calcium channel blockers, botulin toxin injections, and endoscopic pneumatic dilatation, but has not experienced symptom relief?

Modified Heller myotomy and partial fundoplication. ***Modified Heller myotomy and partial fundoplication*** - A **Heller myotomy** involves incising the muscle fibers of the lower esophageal sphincter (LES) to relieve obstruction, which is the definitive treatment for achalasia. - A **partial fundoplication** is added to prevent **postoperative gastroesophageal reflux disease (GERD)**, a common complication of myotomy. *Esophagectomy* - **Esophagectomy** is a highly invasive procedure involving removal of the esophagus, reserved for end-stage achalasia with **megaesophagus** or **recurrent aspiration**, not typically first-line surgical management. - It carries significant morbidity and mortality risks, making it an option only as a **last resort** when other treatments have failed and the esophagus is severely diseased. *Surgical esophagomyotomy proximal to the LES* - A myotomy specifically targets the **hypertonic LES** to relieve dysphagia. Performing it significantly proximal to the LES would not address the primary pathology. - While myotomy is the correct approach, its efficacy depends on precise dissection of the muscle fibers at the **gastroesophageal junction** where the LES is located. *Repeat pneumatic dilation with higher pressures* - Although **pneumatic dilation** is an effective *nonoperative* treatment, the patient has already undergone it without relief, indicating a **refractory case**. - Repeating the procedure with higher pressures increases the risk of **esophageal perforation** without necessarily improving long-term outcomes in a patient who has already failed multiple prior treatments.

Q: Which of the following statements about the esophagoscope is correct?

The incisor acts as a fulcrum.. ***The incisor acts as a fulcrum.*** - During **esophagoscopy**, the upper incisors serve as the pivotal point or **fulcrum** against which the instrument is manipulated. - This positioning allows for controlled advancement and angulation of the esophagoscope into the esophagus. *It lifts the epiglottis.* - The **esophagoscope** is primarily designed to visualize the esophagus and does not typically lift the **epiglottis**. - **Laryngoscopes** are the instruments specifically used to lift the epiglottis for visualizing the vocal cords and trachea during intubation. *The tip is in the pyriform fossa.* - The **pyriform fossa** is a structure in the **hypopharynx**, and while the esophagoscope passes through this region, its tip is advanced beyond it into the **esophagus** for proper visualization. - Positioning the tip solely in the pyriform fossa would not achieve the purpose of an **esophagoscopy**, which is to examine the esophageal lumen. *It compresses the posterior tongue.* - The esophagoscope is carefully advanced to bypass the tongue and pharyngeal structures, not to **compress** the **posterior tongue**. - Compression of the posterior tongue would obstruct the view and potentially cause trauma or gag reflex, hindering the procedure.

Q: What is the absolute indication for choledochotomy?

Palpable CBD stone. ***Palpable CBD stone*** - A **palpable stone in the common bile duct (CBD)** during surgery is an absolute indication for **choledochotomy** (surgical incision into the CBD) to remove the stone. - This direct finding necessitates immediate removal to prevent complications like **cholangitis**, **pancreatitis**, or **biliary obstruction**. *Gallstone ileus* - This condition involves a **gallstone eroding into the bowel** and causing mechanical obstruction, typically in the small intestine. - While it's a complication of gallstone disease, the primary treatment involves addressing the bowel obstruction, not necessarily choledochotomy for the CBD itself. *Fever* - Fever in the context of biliary disease usually indicates **cholangitis** or other infections. - While it prompts investigation for **biliary obstruction**, fever alone is not an absolute indication for choledochotomy without evidence of a CBD stone that requires removal. *Gallstone pancreatitis* - **Gallstone pancreatitis** occurs when gallstones obstruct the pancreatic duct or ampulla, leading to inflammation of the pancreas. - Most cases resolve spontaneously, and the primary management often involves supportive care and elective cholecystectomy, not immediate choledochotomy unless there's persistent obstruction or cholangitis.

Q: All of the following may be features of a silent carcinoma of the body of the stomach except which of the following?

Dysphagia. ***Dysphagia*** - **Dysphagia** (difficulty swallowing) is a prominent symptom typically associated with carcinomas of the **cardia** or **fundus** of the stomach, where the tumor directly impedes food passage [1]. - A silent carcinoma of the **body of the stomach** is less likely to cause dysphagia until it has grown extensively or metastasized, making this the exception among the listed options [1]. *Obstructive jaundice* - A silent carcinoma of the stomach body can metastasize to the **liver** or the **porta hepatis** lymph nodes, leading to compression of the bile ducts [1]. - This compression can cause **obstructive jaundice**, characterized by yellow skin and eyes due to bile flow obstruction [1]. *Ascites* - **Ascites**, the accumulation of fluid in the abdominal cavity, can occur with advanced gastric cancer due to **peritoneal carcinomatosis** (spread of cancer cells to the peritoneum) [1]. - This is a common finding in widespread metastatic disease, even from a initially "silent" primary tumor. *Krukenberg's tumours* - These are **metastatic ovarian tumors** originating from a primary gastrointestinal cancer, most commonly the stomach [1]. - A silent gastric carcinoma can present with these secondary tumors as the first noticeable symptom, especially due to **lymphatic spread** to the ovaries [1].

Q: A 26-year-old male presented with a 4-day history of pain in the right-sided lower abdomen, accompanied by frequent vomiting. His general condition is fair, and clinically, a tender lump was felt in the right iliac fossa. What is the most appropriate management for this case?

Ochsner-Sherren regimen for appendicitis with mass. ***Ochsner-Sherren regimen for appendicitis with mass*** - The presence of a **tender lump in the right iliac fossa** suggests a contained appendiceal mass or abscess, indicating a more chronic or walled-off inflammatory process rather than acute perforation. - The Ochsner-Sherren regimen involves **conservative management** with intravenous fluids, antibiotics, and close observation, aiming to resolve the inflammation before considering elective appendectomy. *Exploratory laparotomy* - This is a more invasive procedure typically reserved for cases where there is **peritoneal irritation**, generalized peritonitis, or diagnostic uncertainty. - In cases of a contained appendiceal mass, immediate laparotomy might disrupt the natural containment, potentially leading to **widespread peritonitis**. *Immediate appendectomy* - Immediate appendectomy is indicated for **acute, uncomplicated appendicitis** or appendicitis with signs of perforation without a well-defined mass. - Performing an immediate appendectomy on a well-established appendiceal mass or abscess carries a **higher risk of complications** like bowel injury or incomplete removal due to inflamed and friable tissues. *External drainage* - External drainage is considered for a **well-localized appendiceal abscess** that can be accessed percutaneously, often guided by imaging. - While it might be a part of the management for an appendiceal abscess, it is not the initial or sole management for an **appendiceal mass**, which first requires conservative treatment to reduce inflammation.

Q: How do you differentiate between mechanical obstruction and paralytic ileus?

Absence of rectal gas shadow in imaging studies. ***Absence of rectal gas shadow in imaging studies*** - In **mechanical bowel obstruction**, there is typically an **absent rectal gas shadow** because the physical blockage prevents gas from reaching the distal bowel and rectum. - This finding is a **classic radiological sign** that helps distinguish mechanical obstruction from paralytic ileus, where rectal gas is usually present throughout the bowel. *Presence of multiple air-fluid levels in the bowel* - **Multiple air-fluid levels** can be seen in both **mechanical obstruction** and **paralytic ileus**, making it a poor differentiating feature. - While more pronounced in mechanical obstruction, air-fluid levels are not specific enough to reliably distinguish between the two conditions. *Presence of abdominal distension* - **Abdominal distension** occurs in both **mechanical obstruction** (due to trapped gas proximal to blockage) and **paralytic ileus** (due to generalized bowel dilation). - This finding is **non-specific** and cannot differentiate between the two conditions as both present with significant distension. *Elevation of hemidiaphragm on imaging* - **Elevated hemidiaphragm** can result from various abdominal conditions causing upward pressure or diaphragmatic dysfunction, not specifically related to bowel obstruction type. - This finding is **not diagnostic** for differentiating mechanical obstruction from paralytic ileus and may be seen in both conditions.

Q: What is the most common cause of bacterial peritonitis?

Perforated viscus. ***Perforated viscus*** - A **perforated viscus**, such as a perforated peptic ulcer or diverticulum, is the most frequent cause of **secondary bacterial peritonitis**. - This leads to the direct spillage of **gastrointestinal contents**, including bacteria, into the peritoneal cavity. *Primary or spontaneous* - **Spontaneous bacterial peritonitis (SBP)** occurs in the absence of an identifiable source of infection, most commonly in patients with **ascites** due to liver cirrhosis. - While significant in its specific patient population, SBP is generally less common than peritonitis resulting from an intra-abdominal source. *Foreign body* - Peritonitis due to a **foreign body** (e.g., retained surgical sponge, swallowed sharp object) is a less common cause compared to perforation. - While it can lead to inflammation and infection, it does not represent the majority of bacterial peritonitis cases. *Biliary peritonitis* - **Biliary peritonitis** results from leakage of bile into the peritoneal cavity, often due to a perforated gallbladder or bile duct injury. - Though serious, it is a specific type of secondary peritonitis and not the overall most common cause, which more broadly includes gastrointestinal perforations.

Q: Which is the most common site for iatrogenic esophageal perforation?

Abdominal perforation. ***Abdominal perforation*** - The **distal esophagus** near the **gastroesophageal (GE) junction** is the most common site for iatrogenic perforation, accounting for the majority of cases. - Most perforations occur during **pneumatic or bougie dilation** for achalasia, strictures, or during **endoscopic procedures** at the GE junction. - This area is vulnerable due to its **thin wall**, lack of serosal covering, and frequent instrumentation during therapeutic procedures. - The distal esophagus is subjected to more forceful interventions (dilations, stent placements) compared to other segments. *Cervical perforation* - While cervical perforations do occur (often during passage through the **cricopharyngeus muscle** or **upper esophageal sphincter**), they are **less common** than distal esophageal perforations. - The cervical esophagus is more accessible and procedures here tend to be less aggressive than distal therapeutic interventions. - Cervical perforations have a better prognosis due to **easier drainage** into the neck rather than mediastinum. *Above arch of aorta* - This segment of the mid-thoracic esophagus at the level of the **aortic arch** represents a point of anatomic narrowing. - Perforations here are less common than at the GE junction but can occur during difficult intubations or foreign body removal. *Below arch of aorta* - The **lower thoracic esophagus** below the aortic arch but above the GE junction is relatively less commonly perforated. - While this area can be injured, the highest risk zone remains the **distal-most esophagus** at the GE junction where most therapeutic procedures are performed.

Q: What is the investigation of choice in peptic ulcer perforation?

X-Ray abdomen. ***X-Ray abdomen*** - An **X-ray of the abdomen in erect position** (or an **erect chest X-ray**) is the initial and often diagnostic investigation for a perforated peptic ulcer due to the presence of **free air under the diaphragm**. - The visualization of **subdiaphragmatic free air** (pneumoperitoneum) indicates a breach in the gastrointestinal tract. - **Erect positioning** is essential as it allows gas to rise and accumulate under the diaphragm, making it visible on the radiograph. *USG* - **Ultrasound (USG)** can sometimes detect free fluid or signs of perforation, but it is less sensitive and specific for detecting free air when compared to a plain X-ray. - Its utility is more in detecting **intra-abdominal fluid collections** or assessing solid organs, rather than pneumoperitoneum. *Paracentesis* - **Paracentesis** involves aspirating fluid from the peritoneal cavity for analysis and is primarily used to diagnose **ascites** or **spontaneous bacterial peritonitis**. - It is not the initial diagnostic test for peptic ulcer perforation, nor does it directly visualize free air. *CT scan* - A **CT scan** is highly sensitive and can detect even small amounts of **free air** or fluid, making it the most definitive imaging study for perforation. - However, it is typically performed if the diagnosis is ambiguous after a plain X-ray or when surgical planning requires more detailed anatomical information, not as the first-line investigation due to higher cost and radiation exposure.

Question 1

A chest X-ray (CXR) of a patient is shown. What is the next step in management of this patient?

Accepted Answer

Exploratory laparotomy

Answer

Ventilation perfusion scan

Answer

Bronchoalveolar lavage

Answer

High resolution CT scan

Question 2

What is the most appropriate surgical management for a patient with achalasia who has tried nonoperative therapies, including lifestyle modifications, calcium channel blockers, botulin toxin injections, and endoscopic pneumatic dilatation, but has not experienced symptom relief?

Accepted Answer

Modified Heller myotomy and partial fundoplication

Answer

Repeat pneumatic dilation with higher pressures

Answer

Esophagectomy

Answer

Surgical esophagomyotomy proximal to the LES

Question 3

Which of the following statements about the esophagoscope is correct?

Accepted Answer

The incisor acts as a fulcrum.

Answer

It lifts the epiglottis.

Answer

The tip is in the pyriform fossa.

Answer

It compresses the posterior tongue.

Question 4

What is the absolute indication for choledochotomy?

Accepted Answer

Palpable CBD stone

Answer

Gallstone ileus

Answer

Fever

Answer

Gallstone pancreatitis

Question 5

All of the following may be features of a silent carcinoma of the body of the stomach except which of the following?

Accepted Answer

Dysphagia

Answer

Obstructive jaundice

Answer

Krukenberg's tumours

Answer

Ascites

Question 6

A 26-year-old male presented with a 4-day history of pain in the right-sided lower abdomen, accompanied by frequent vomiting. His general condition is fair, and clinically, a tender lump was felt in the right iliac fossa. What is the most appropriate management for this case?

Accepted Answer

Ochsner-Sherren regimen for appendicitis with mass

Answer

Immediate appendectomy

Answer

External drainage

Answer

Exploratory laparotomy

Question 7

How do you differentiate between mechanical obstruction and paralytic ileus?

Accepted Answer

Absence of rectal gas shadow in imaging studies

Answer

Presence of multiple air-fluid levels in the bowel

Answer

Presence of abdominal distension

Answer

Elevation of hemidiaphragm on imaging

Question 8

What is the most common cause of bacterial peritonitis?

Accepted Answer

Perforated viscus

Answer

Primary or spontaneous

Answer

Foreign body

Answer

Biliary peritonitis

Question 9

Which is the most common site for iatrogenic esophageal perforation?

Accepted Answer

Abdominal perforation

Answer

Cervical perforation

Answer

Above arch of aorta

Answer

Below arch of aorta

Question 10

What is the investigation of choice in peptic ulcer perforation?

Accepted Answer

X-Ray abdomen

Answer

Paracentesis

Answer

CT scan

Answer

USG

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?