Gastrointestinal Surgery Practice Questions

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: 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: 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: 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

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 2

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 3

What is the most common cause of bacterial peritonitis?

Accepted Answer

Perforated viscus

Answer

Primary or spontaneous

Answer

Foreign body

Answer

Biliary peritonitis

Question 4

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 5

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 6

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

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