Gastrointestinal Surgery Practice Questions

Q: What is the most common cause of posterior duodenal ulcer bleeding name the artery involved?

Gastroduodenal artery. ***Gastroduodenal artery*** - Posterior duodenal ulcers are notorious for eroding into the **gastroduodenal artery**, which runs posterior to the first part of the duodenum. - This anatomical relationship makes these ulcers prone to **severe, life-threatening hemorrhage** rather than perforation. *Left epiploic artery* - The **left gastroepiploic artery** (also known as the left epiploic artery) typically runs along the greater curvature of the stomach. - It is not anatomically positioned to be affected by ulceration of the posterior duodenum. *Right epiploic artery* - The **right gastroepiploic artery** also runs along the greater curvature of the stomach and is a branch of the gastroduodenal artery. - While it branches from the gastroduodenal system, it is not the specific vessel eroded by posterior duodenal ulcers. *Intercostal artery* - **Intercostal arteries** are located within the thoracic cavity, beneath the ribs, and are completely unrelated to the anatomy of the duodenum. - These vessels are primarily involved in chest wall injuries or thoracic surgical procedures, not peptic ulcer disease.

Q: In which type of constipation are stimulant laxatives contraindicated or should be avoided?

Spastic constipation. ***Spastic constipation*** - In this condition, the bowel hyperactivates causing **painful spasms** and cramping; therefore, **stimulant laxatives** are contraindicated as they increase peristalsis and worsen the spasm. - Management typically involves **antispasmodics** and dietary adjustments rather than motility-enhancing agents. *Habitual constipation* - This type results from poor dietary habits and ignoring the urge to defecate, often requiring **lifestyle modifications** such as increased fiber and fluid intake. - Mild stimulant laxatives may sometimes be used as a last resort, but they are not the primary treatment of choice. *Atonic constipation* - This presents with a **hypotonic colon** characterized by sluggish motility, where stimulant laxatives can be beneficial to promote movement. - It is often associated with aging, chronic laxative abuse, or neurological disorders where the bowel lacks the tone to propel contents. *Post-operative constipation* - Often caused by **anesthesia** or **post-surgical ileus**, which requires careful management of intestinal motility. - While caution is advised to prevent bowel perforation, stimulant laxatives are sometimes cautiously used if there is no evidence of obstruction.

Q: Which of the following clinical features best distinguishes mechanical small bowel obstruction from paralytic ileus?

Colicky abdominal pain. ***Colicky abdominal pain*** - In **mechanical small bowel obstruction (SBO)**, the bowel proximal to the obstruction undergoes vigorous peristaltic contractions in an attempt to overcome the lumen blockage, resulting in characteristic **high-pitched** and periodic **colicky pain**. - Conversely, a **paralytic ileus** is marked by a complete cessation of peristaltic activity due to neurogenic or myogenic failure, resulting in an abdomen that is typically silent, without the peristaltic rushes that cause severe colicky pain. *Tachycardia* - **Tachycardia** is a non-specific sign and a common clinical finding in both **mechanical SBO** and **paralytic ileus**, often secondary to dehydration, electrolyte imbalances, or systemic distress. - Because it can occur in both conditions as a result of hypovolemia or metabolic disturbance, it does not serve as a reliable differentiating feature. *Vomiting* - **Vomiting** is a hallmark symptom of both conditions, occurring as bowel contents accumulate proximal to the obstruction or as the gut fails to propel contents forward in an ileus. - While the severity may vary based on the level of obstruction, it does not reliably distinguish between the two entities on its own. *Abdominal distension* - **Abdominal distension** is a generalized sign of both **SBO** and **paralytic ileus**, occurring as air and fluid accumulate within the non-propulsive or obstructed bowel segments. - It is a common clinical finding in any setting of bowel dysfunction and cannot be used to differentiate the mechanical cause from the functional motility failure of an ileus.

Q: A 55-year-old patient presents to the emergency department with abdominal pain, distension, and vomiting. Imaging confirms a diagnosis of cecal volvulus. Which of the following risk factors is responsible for 50-70% of cecal volvulus cases?

Previous abdominal surgery. ***Previous abdominal surgery*** - **Previous abdominal surgery** is the most common predisposing factor for cecal volvulus, as resulting **adhesions** create a fixed point around which the cecum can twist. - Between 50% and 70% of patients diagnosed with this condition have a history of prior operative procedures on the abdomen. *High-fiber diet* - While high fiber intake can influence bowel motility, it is not a primary established risk factor for the mechanical torsion seen in a volvulus. - Dietary factors are generally more associated with conditions like diverticulosis rather than volvulus formation. *Lactulose abuse* - Lactulose administration can cause bowel distension and gas but is not a recognized direct cause of anatomic volvulus. - It is typically used for hepatic encephalopathy or constipation and has no documented link to the high incidence rates requested. *Female sex* - While age and certain anatomical variations may correlate, female sex is not the causative risk factor responsible for the majority of cases. - Cecal volvulus is frequently associated with a congenital **hypermobile cecum** (lack of peritoneal attachment), which is an anatomical predisposition rather than gender-dependent.

Q: A 37-year-old woman presents with high fever (39.5°C), nausea, and vomiting. Physical examination reveals increased abdominal pain in the paraumbilical region, rebound tenderness over McBurney's point, and a positive psoas sign. Blood tests show marked leukocytosis. What is the most likely diagnosis?

Appendicitis. ### Explanation **Correct Answer: B. Appendicitis** The clinical presentation is a classic textbook case of **Acute Appendicitis**. The diagnosis is primarily clinical, based on the following findings: * **Paraumbilical pain:** This represents visceral pain from the T10 dermatome as the appendix distends. * **McBurney’s Point Tenderness:** As the parietal peritoneum becomes inflamed, the pain localizes to the Right Iliac Fossa (RIF). * **Psoas Sign:** Pain on extension of the right hip indicates an inflamed appendix in a **retrocecal** position, irritating the iliopsoas muscle. * **Systemic Signs:** High fever, nausea, vomiting, and marked leukocytosis (left shift) are indicative of an acute inflammatory/infectious process. **Why Incorrect Options are Wrong:** * **A. Ectopic Pregnancy:** While it causes RIF pain, it is usually associated with amenorrhea, vaginal bleeding, and hemodynamic instability if ruptured. Fever and high leukocytosis are less common unless there is secondary infection. * **C. Cholecystitis:** Pain is typically localized in the **Right Upper Quadrant (RUQ)** and radiates to the right scapula (Boas' sign). Murphy’s sign would be positive, not McBurney’s. * **D. Nephrolithiasis:** Presents as "loin to groin" colicky pain. While it causes nausea, it rarely presents with high fever or rebound tenderness unless complicated by pyelonephritis. **High-Yield Clinical Pearls for NEET-PG:** * **Alvarado Score (MANTRELS):** A score ≥7 is highly suggestive of appendicitis. * **Most common position:** Retrocecal (75%), followed by Pelvic (20%). * **Rovsing’s Sign:** Pain in the RIF when the Left Iliac Fossa is palpated. * **Investigation of Choice:** Contrast-Enhanced CT (CECT) is the gold standard in adults; Ultrasound is preferred in children and pregnant women.

Q: A 60-year-old female presents with a tender, irreducible mass immediately below and lateral to the pubic tubercle. Plain abdominal X-ray shows intestinal obstruction. What is the most likely diagnosis?

Strangulated femoral hernia. ### Explanation **1. Why the Correct Answer is Right:** The diagnosis is based on the anatomical location of the mass. A **femoral hernia** typically presents as a lump **below and lateral to the pubic tubercle**, passing through the femoral canal. This is in contrast to an inguinal hernia, which is found above and medial to the pubic tubercle. Femoral hernias have a very high risk of **strangulation** (up to 40%) because the femoral ring is narrow and rigid (bounded by the lacunar ligament). The patient’s presentation—a tender, irreducible mass combined with clinical signs of intestinal obstruction (vomiting, distension, and X-ray findings)—is a classic "textbook" description of a strangulated femoral hernia. **2. Why the Incorrect Options are Wrong:** * **Small bowel carcinoma:** While it can cause obstruction, it would not present as a tender, palpable mass in the groin. * **Adhesions:** This is the most common cause of small bowel obstruction overall, but it does not explain the presence of a localized, irreducible groin mass. * **Strangulated inguinal hernia:** An inguinal hernia emerges **above and medial** to the pubic tubercle. While it is a common cause of obstruction, the specific anatomical description provided points definitively to the femoral canal. **3. NEET-PG High-Yield Pearls:** * **Demographics:** Femoral hernias are more common in **females** (due to a wider pelvis), though inguinal hernias remain the most common hernia type in both sexes. * **Anatomy:** The femoral canal is bounded medially by the **Lacunar (Gimbernat’s) ligament**, which is often the site of constriction in strangulation. * **Management:** Because of the high risk of strangulation, all femoral hernias should be repaired surgically upon diagnosis. * **Differential:** A "Cloquet’s node" (enlarged lymph node in the femoral canal) can mimic a femoral hernia but usually does not cause bowel obstruction.

Question 1

What is the most common cause of posterior duodenal ulcer bleeding name the artery involved?

Accepted Answer

Gastroduodenal artery

Answer

Left epiploic artery

Answer

Right epiploic artery

Answer

Intercostal artery

Question 2

In which type of constipation are stimulant laxatives contraindicated or should be avoided?

Accepted Answer

Spastic constipation

Answer

Habitual constipation

Answer

Atonic constipation

Answer

Post-operative constipation

Question 3

Which of the following clinical features best distinguishes mechanical small bowel obstruction
from paralytic ileus?

Accepted Answer

Colicky abdominal pain

Answer

Tachycardia

Answer

Vomiting

Answer

Abdominal distension

Question 4

A 55-year-old patient presents to the emergency department with abdominal pain, distension,
and vomiting. Imaging confirms a diagnosis of cecal volvulus. Which of the following risk factors is
responsible for 50-70% of cecal volvulus cases?

Accepted Answer

Previous abdominal surgery

Answer

High-fiber diet

Answer

Lactulose abuse

Answer

Female sex

Question 5

A 52-year-old male with a known history of peptic ulcer disease presents to the emergency department with sudden-onset severe epigastric pain described as 'like being stabbed', now spreading across the entire abdomen. He is lying completely still, has board-like rigidity on examination, and his vital signs show BP 118/76 mmHg, HR 92/min, RR 18/min, SpO2 98% on room air. He takes NSAIDs regularly for chronic back pain. His erect chest X-ray is shown (Image 1). After establishing IV access, sending bloods, commencing IV fluids, analgesia, and immediate broad-spectrum IV antibiotics, what is the most appropriate next step in management?

Accepted Answer

C. Urgent operative repair and peritoneal lavage, with laparoscopic or open access determined by patient stability and local expertise

Answer

A. Urgent upper GI endoscopy to identify and clip the bleeding vessel

Answer

B. CT abdomen with IV contrast to confirm the source of perforation before intervention

Answer

D. Nasogastric tube insertion, IV proton pump inhibitor infusion, and conservative management for 24 hours

Question 6

A 70-year-old man with atrial fibrillation presents with severe periumbilical pain out of proportion to physical findings, bloody diarrhoea, and a markedly elevated serum lactate. He is haemodynamically unstable despite initial resuscitation. A CECT abdomen is shown (Image 2). Which of the following best describes the most appropriate operative strategy for this patient?

Accepted Answer

Emergency laparotomy with urgent SMA embolectomy or other feasible revascularization, resection of clearly nonviable bowel, temporary discontinuity, and planned second-look laparotomy

Answer

Damage control laparotomy with resection of non-viable bowel, leaving bowel in discontinuity, and planned relook at 24–48 hours

Answer

Emergency catheter-directed thrombolysis via superior mesenteric artery angiography before any surgical intervention

Answer

Systemic anticoagulation with unfractionated heparin infusion and reassessment of bowel viability at 6 hours

Question 7

Which of the following statements about duodenal adenocarcinoma is correct?

Accepted Answer

It is the most common small bowel carcinoma.

Answer

It is a periampullary carcinoma.

Answer

Jaundice and anemia are the most common symptoms.

Answer

Local resection is curative.

Question 8

A 32-year-old patient presents with diarrhea and flushing. CT scan reveals multiple lesions in the liver. The primary disease is most likely located in which of the following?

Accepted Answer

Small bowel

Answer

Esophagus

Answer

Appendix

Answer

Stomach

Question 9

A 37-year-old woman presents with high fever (39.5°C), nausea, and vomiting. Physical examination reveals increased abdominal pain in the paraumbilical region, rebound tenderness over McBurney's point, and a positive psoas sign. Blood tests show marked leukocytosis. What is the most likely diagnosis?

Accepted Answer

Appendicitis

Answer

Ectopic pregnancy

Answer

Cholecystitis

Answer

Nephrolithiasis

Question 10

A 60-year-old female presents with a tender, irreducible mass immediately below and lateral to the pubic tubercle. Plain abdominal X-ray shows intestinal obstruction. What is the most likely diagnosis?

Accepted Answer

Strangulated femoral hernia

Answer

Small bowel carcinoma

Answer

Adhesions

Answer

Strangulated inguinal hernia

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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