Gastrointestinal Surgery Practice Questions

Q: In which one of the following conditions is gas under the diaphragm typically seen?

Perforated duodenal ulcer. ***Perforated duodenal ulcer*** - A perforated duodenal ulcer creates a communication between the **lumen of the duodenum and the peritoneal cavity**, allowing air from the gastrointestinal tract to escape. - This free air, being lighter, rises and collects under the **diaphragm**, visible as **pneumoperitoneum** on an upright chest X-ray. - This is the **classic and most typical** presentation taught in medical education for gas under the diaphragm. - Occurs in approximately **70-75% of cases** of peptic ulcer perforation. *Typhoid perforation* - Typhoid perforation (typically affecting the **terminal ileum**) also causes pneumoperitoneum and can show gas under the diaphragm. - However, it is **less commonly encountered** in routine practice compared to peptic ulcer perforation in most settings. - The question asks for the **"typically seen"** condition, which refers to the classic teaching example: perforated duodenal ulcer. *After laparotomy* - It is normal to see a small amount of **residual intra-abdominal gas** for a few days to a week after a laparotomy, which can collect under the diaphragm. - However, this is a **post-surgical finding** and not a pathological condition leading to gas under the diaphragm in the same acute, diagnostic sense as a perforation. - Not the answer when considering pathological causes. *Spontaneous rupture of oesophagus* - Spontaneous oesophageal rupture (Boerhaave syndrome) leads to leakage of oesophageal contents into the **mediastinum or pleural cavity**, not the peritoneal cavity. - Presents with **mediastinal emphysema** (Hamman's sign) and pleural effusion rather than pneumoperitoneum. - **Subdiaphragmatic free air** indicative of pneumoperitoneum is not typically seen.

Q: Which of the following is a component of the Alvarado score?

Loss of appetite. ***Loss of appetite*** - **Anorexia** (loss of appetite) is a key symptom considered in the Alvarado score, contributing 1 point to the total. - This symptom is often one of the **earliest indicators** of acute appendicitis. *Leucopenia* - The Alvarado score uses **leukocytosis** (elevated white blood cell count greater than 10,000/mm³), not leucopenia, as a component. - **Leucopenia** (decreased white blood cell count) is generally not indicative of acute appendicitis. *Diarrhea* - While diarrhea can sometimes accompany appendicitis, it is **not a specific component** of the Alvarado score. - The score focuses on classic appendicitis symptoms like **migratory and right lower quadrant pain**. *Periumbilical pain* - The Alvarado score specifically considers **migratory pain to the right iliac fossa** (RLQ tenderness) as a component, not just periumbilical pain. - Although pain often starts periumbilically, the score emphasizes the **subsequent migration** of pain.

Q: A 55-year-old male presents with a history of dysphagia with vomiting of undigested food throughout the day, weight loss, and appears emaciated and dehydrated. No mass is palpable per abdomen. After appropriate diagnostic workup reveals a benign esophageal stricture, the most appropriate definitive management is:

Endoscopic dilation. ***Endoscopic dilation (preferred treatment)*** - **Endoscopic dilation** directly addresses the underlying problem of the **benign esophageal stricture** by widening the narrowed esophagus, which is crucial for relieving dysphagia and improving nutritional intake. - Given the patient's severe symptoms like **weight loss**, **emaciation**, and **dehydration**, dilation allows for symptom relief and subsequent rehydration and nutritional support. *IV total parenteral nutrition* - While TPN provides nutrition, it does not resolve the **mechanical obstruction** caused by the stricture and carries risks such as infection and metabolic complications. - It's typically reserved for situations where enteral feeding is not possible or adequate after addressing the obstruction. *IV normal saline* - **IV normal saline** would help address the immediate **dehydration**, but it does not treat the underlying cause of the patient's symptoms (the esophageal stricture). - This is a supportive measure, not the primary management strategy for the stricture itself. *pH monitoring* - **pH monitoring** is used to diagnose and assess gastroesophageal reflux disease (**GERD**), which can sometimes cause strictures. - However, in a patient with a confirmed benign esophageal stricture and severe obstructive symptoms, addressing the stricture mechanically (dilation) takes precedence over diagnostic testing for reflux.

Q: Treatment for ileal obstruction due to roundworm infestation is

Enterotomy, removal of worms and primary closure. ***Enterotomy, removal of worms and primary closure*** - For **ileal obstruction** by **roundworms**, **surgical intervention** involves opening the affected bowel segment (**enterotomy**), carefully extracting the worm bolus, and then closing the incision primarily. - This approach is favored because the bowel itself is usually **healthy**, and the obstruction is purely mechanical from the worms. *Resection with end to end anastomosis* - This aggressive approach of **resecting** part of the bowel is generally **unnecessary** and **risky** when the bowel is otherwise healthy and viable, as is typical in roundworm obstruction. - It carries risks of **anastomotic leakage** and **short gut syndrome** if repeated resections are needed, making simple worm removal a preferable option. *Resection with side to side anastomosis* - Similar to end-to-end anastomosis, **resection** of the bowel is generally avoided unless there is **irreversible damage** or **ischemia** to the bowel, which is not the primary pathology in uncomplicated roundworm obstruction. - This method is more complex and less optimal than simply removing the obstruction, given the typically *healthy* nature of the bowel wall. *Diversion* - **Diversion** procedures, such as **stoma formation**, are generally reserved for situations with **perforation**, **gross contamination**, or complex obstructions where primary repair is considered unsafe or impossible. - In a straightforward ileal obstruction due to worms, the goal is to resolve the obstruction with minimal intervention to preserve bowel continuity.

Q: Prepyloric or channel ulcer in the stomach is termed as:

Type 3. ***Type 3*** - **Type 3 ulcers** are located in the **prepyloric region** or within the **pyloric channel** of the stomach. - They are often associated with **duodenal ulcers** and are characterized by **normal to high acid secretion**. *Type 1* - **Type 1 ulcers** are typically found in the **lesser curvature of the stomach body**, not the prepyloric region. - These ulcers are usually associated with **low or normal acid secretion** and are often linked to *H. pylori* infection. *Type 2* - **Type 2 ulcers** involve both a **gastric ulcer** (usually in the body) and an **active or healed duodenal ulcer**. - They are associated with **normal to high acid secretion**, but the location is not exclusively prepyloric. *Type 4* - **Type 4 ulcers** are located high on the **lesser curvature near the gastroesophageal junction**. - They are associated with **low acid secretion** and are sometimes termed **juxta-esophageal ulcers**.

Q: Spigelian hernia is

Through lateral border of rectus abdominis. ***Through lateral border of rectus abdominis*** - A **Spigelian hernia** protrudes through the **Spigelian aponeurosis**, which is the aponeurosis of the transversus abdominis muscle, primarily located along the **lateral border of the rectus abdominis muscle**. - Its typical location is often at the **semilunar line**, making it a challenging diagnosis due to its intermittent presentation and potential for strangulation. *Through linea alba* - A hernia through the **linea alba** (midline fibrous structure) is known as an **epigastric hernia** if above the umbilicus, or an **umbilical hernia** if at the umbilicus. - These are distinct from Spigelian hernias which are lateral to the rectus sheath. *Through lateral wall of inguinal canal* - This description typically refers to an **indirect inguinal hernia**, where the contents pass through the **deep inguinal ring**. - This type of hernia travels through the entire inguinal canal and emerges through the superficial ring. *Through medial wall of inguinal canal* - This would describe a **direct inguinal hernia**, which protrudes directly through the posterior wall of the inguinal canal, specifically through **Hesselbach's triangle**. - This is medial to the inferior epigastric vessels, while Spigelian hernias are more superior and lateral.

Q: Esophageal manometry is useful in diagnosing all of the following conditions EXCEPT:

Malignancy (not typically diagnosed with this test). ***Malignancy (not typically diagnosed with this test)*** - **Esophageal manometry** evaluates the **motor function** of the esophagus, measuring pressure changes during swallowing. - **Malignancy**, such as esophageal cancer, is primarily diagnosed with **endoscopy with biopsy** and imaging studies, not by assessing motility. *Achalasia (a motility disorder)* - **Esophageal manometry** is the **gold standard** for diagnosing achalasia, characterized by **absent peristalsis** in the esophageal body and **incomplete relaxation of the lower esophageal sphincter (LES)** [1]. - High-resolution manometry shows elevated **integrated relaxation pressure (IRP)** and often pan-esophageal pressurization. *Diffuse esophageal spasm (a motility disorder)* - This condition is also diagnosed by **esophageal manometry**, which reveals simultaneous, **non-peristaltic contractions** of high amplitude, often interspersed with normal peristalsis [1]. - It may also show **premature contractions** and **multiple rapid swallows** triggering spasm. *Assessment of esophageal motility prior to surgery for GERD* - **Manometry** is routinely performed before **anti-reflux surgery (e.g., Nissen fundoplication)** to rule out underlying esophageal motility disorders that could complicate surgery or worsen symptoms post-operatively [1]. - Identifying conditions like **achalasia** or **scleroderma** would contraindicate a standard fundoplication, as dysphagia could worsen [1].

Q: Which of the following is a common consequence of gastrectomy?

Iron deficiency. ***Iron deficiency*** - Gastrectomy often leads to **achlorhydria** or hypochlorhydria, reducing the conversion of **ferric iron** (Fe3+) to its more absorbable ferrous form (Fe2+). - Additionally, bypassing the duodenum, a primary site of iron absorption, further contributes to **iron malabsorption**. *Calcium deficiency* - While gastrectomy can contribute to calcium malabsorption due to reduced gastric acidity and faster transit, **iron deficiency** is typically a more direct and common initial consequence. - **Vitamin D deficiency**, often co-occurring with gastrectomy, is a more direct cause of **calcium malabsorption**. *Steatorrhoea* - **Steatorrhoea** (fat malabsorption) is more commonly associated with conditions affecting the **pancreas** or **small intestine** (e.g., celiac disease, chronic pancreatitis) rather than primarily gastrectomy unless there is significant bile salt malabsorption or rapid gastric emptying affecting nutrient mixing. - Although rapid transit post-gastrectomy can sometimes impair fat digestion, it's not the most common direct consequence compared to iron deficiency. *Fluid loss* - **Fluid loss** is usually an acute post-surgical complication or related to conditions causing vomiting or diarrhea, and not a common long-term consequence of gastrectomy itself. - While **dumping syndrome** can occur after gastrectomy, causing osmotic fluid shifts into the intestine, generalized chronic fluid loss is not a primary recognized long-term sequela.

Q: What does the term 'gastrotomy' refer to?

Making an incision into the stomach. ***Making an incision into the stomach*** - The suffix **-otomy** specifically refers to the **surgical creation of an incision** or a cutting open of an organ or structure. - In this context, **gastr-** refers to the **stomach**, thus "gastrotomy" means cutting into the stomach. *Closing the stomach after tube insertion* - While a gastrotomy might precede tube insertion, "closing" the stomach is distinct and typically part of the **wound closure** rather than the incision itself. - The term for surgical closure is generally **-rrhaphy**, not -otomy. *Removing a part of the stomach* - The surgical removal of a part of an organ is indicated by the suffix **-ectomy**, such as in **gastrectomy**. - Gastrotomy only implies making an incision, not the resection of tissue. *Resecting the upper part of the stomach* - This describes a **partial gastrectomy** or **fundectomy**, which involves the removal of tissue. - Gastrotomy is a simpler procedure involving only an incision, without tissue removal.

Q: Which of the following hernias has the highest risk of strangulation?

Spigelian. ***Spigelian*** - **Spigelian hernias** occur through a defect in the **Spigelian aponeurosis** (between the semilunar line and lateral border of rectus abdominis), typically inferior to the arcuate line. - They have a **high risk of strangulation (20-25%)** due to their **narrow fascial defect** and tendency to become incarcerated through the layers of the abdominal wall. - The hernia often becomes **interparietal** (between muscle layers), making it difficult to detect clinically, which increases the risk of delayed presentation and strangulation. *Indirect* - **Indirect inguinal hernias** pass through the **deep inguinal ring** and follow the inguinal canal, potentially entering the scrotum. - While they do have a narrow neck that can cause strangulation, their **strangulation risk is moderate (~10-15%)**, lower than Spigelian hernias. - They are the most common type of hernia but not the highest risk for strangulation among these options. *Direct* - **Direct inguinal hernias** protrude through **Hesselbach's triangle** in the posterior wall of the inguinal canal. - They have a **broad-based neck**, making strangulation relatively uncommon (~5%). - The wider defect allows easier reduction and less constriction of contents. *Incisional* - **Incisional hernias** develop at previous surgical incision sites due to fascial weakness or inadequate healing. - While they can incarcerate, they typically have a **wider neck** and **lower strangulation risk** compared to Spigelian or indirect inguinal hernias. - Risk varies with defect size, but generally not the highest among common hernia types.

Question 1

In which one of the following conditions is gas under the diaphragm typically seen?

Accepted Answer

Perforated duodenal ulcer

Answer

Typhoid perforation

Answer

After laparotomy

Answer

Spontaneous rupture of oesophagus

Question 2

Which of the following is a component of the Alvarado score?

Accepted Answer

Loss of appetite

Answer

Leucopenia

Answer

Diarrhea

Answer

Periumbilical pain

Question 3

A 55-year-old male presents with a history of dysphagia with vomiting of undigested food throughout the day, weight loss, and appears emaciated and dehydrated. No mass is palpable per abdomen. After appropriate diagnostic workup reveals a benign esophageal stricture, the most appropriate definitive management is:

Accepted Answer

Endoscopic dilation

Answer

IV normal saline

Answer

pH monitoring

Answer

IV total parenteral nutrition

Question 4

Treatment for ileal obstruction due to roundworm infestation is

Accepted Answer

Enterotomy, removal of worms and primary closure

Answer

Resection with end to end anastomosis

Answer

Resection with side to side anastomosis

Answer

Diversion

Question 5

Prepyloric or channel ulcer in the stomach is termed as:

Accepted Answer

Type 3

Answer

Type 1

Answer

Type 4

Answer

Type 2

Question 6

Spigelian hernia is

Accepted Answer

Through lateral border of rectus abdominis

Answer

Through linea alba

Answer

Through lateral wall of inguinal canal

Answer

Through medial wall of inguinal canal

Question 7

Esophageal manometry is useful in diagnosing all of the following conditions EXCEPT:

Accepted Answer

Malignancy (not typically diagnosed with this test)

Answer

Achalasia (a motility disorder)

Answer

Diffuse esophageal spasm (a motility disorder)

Answer

Assessment of esophageal motility prior to surgery for GERD

Question 8

Which of the following is a common consequence of gastrectomy?

Accepted Answer

Iron deficiency

Answer

Calcium deficiency

Answer

Steatorrhoea

Answer

Fluid loss

Question 9

What does the term 'gastrotomy' refer to?

Accepted Answer

Making an incision into the stomach

Answer

Closing the stomach after tube insertion

Answer

Removing a part of the stomach

Answer

Resecting the upper part of the stomach

Question 10

Which of the following hernias has the highest risk of strangulation?

Accepted Answer

Spigelian

Answer

Indirect

Answer

Direct

Answer

Incisional

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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