Gastrointestinal Surgery Practice Questions

Q: Which of the following vessels is most commonly involved in hemorrhage from a duodenal ulcer?

Gastroduodenal artery. **Explanation:** The **Gastroduodenal Artery (GDA)** is the correct answer due to its specific anatomical relationship with the duodenum. 1. **Why it is correct:** Most peptic ulcer bleeds occur from ulcers located on the **posterior wall** of the first part of the duodenum (D1). The GDA descends vertically behind the first part of the duodenum. When a posterior duodenal ulcer erodes through the mucosa and muscularis layers, it directly involves the GDA, leading to massive, life-threatening upper gastrointestinal hemorrhage. 2. **Why other options are incorrect:** * **Inferior Vena Cava (IVC):** The IVC lies much deeper in the retroperitoneum and posterior to the head of the pancreas; it is not involved in primary peptic ulcer disease. * **Superior Mesenteric Artery (SMA):** The SMA passes anterior to the third part of the duodenum (D3). While it can cause "SMA syndrome" (compression of D3), it is not the source of bleeding in D1 ulcers. * **Inferior Pancreaticoduodenal Artery:** This vessel supplies the lower part of the duodenum and head of the pancreas. It is a branch of the SMA and is located too distal to be the primary source of bleeding from common D1 ulcers. **Clinical Pearls for NEET-PG:** * **Anterior vs. Posterior:** Posterior duodenal ulcers **bleed** (GDA involvement), whereas anterior duodenal ulcers **perforate** (leading to pneumoperitoneum). * **Source of GDA:** It is a branch of the **Common Hepatic Artery** (which originates from the Celiac Trunk). * **Management:** In refractory bleeding, the surgical approach involves a longitudinal duodenotomy and a **three-point "U" stitch** (transfixion) to ligate the GDA.

Q: What is a characteristic feature of jejunal diverticula?

Impaired vitamin B12 absorption. ### Explanation **Correct Answer: C. Impaired vitamin B12 absorption** Jejunal diverticula are typically **acquired, false diverticula** (consisting only of mucosa and submucosa) that occur on the mesenteric border. The primary clinical significance of multiple jejunal diverticula is their association with **Small Intestinal Bacterial Overgrowth (SIBO)**. The stagnant loop within the diverticula promotes the proliferation of anaerobic bacteria. These bacteria compete with the host for nutrients; specifically, they **deconjugate bile salts** and **consume Vitamin B12** (cyanocobalamin) before it can reach the terminal ileum for absorption. This leads to megaloblastic anemia and malabsorption. **Analysis of Incorrect Options:** * **A & B: Impaired folate and ferritin absorption:** Folate and iron (ferritin) are primarily absorbed in the proximal small intestine (duodenum and proximal jejunum). In SIBO, bacteria actually **synthesize folate**, often leading to *elevated* serum folate levels. Therefore, folate deficiency is not a feature. * **D: Positive urea breath test:** This test is specific for detecting *Helicobacter pylori* infection in the stomach, as *H. pylori* produces urease. It is not used to diagnose jejunal diverticula or SIBO (where Glucose or Lactulose breath tests are preferred). **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Occur on the **mesenteric border** (where vasa recta enter the muscularis). * **Triad of Complications:** Malabsorption (B12 deficiency), Diverticulitis, and Perforation/Obstruction. * **Diagnosis:** Often an incidental finding on CT or Enteroclysis; SIBO is confirmed via **Glucose Hydrogen Breath Test**. * **Treatment:** Asymptomatic cases require no treatment. SIBO is managed with antibiotics (e.g., Rifaximin); surgery is reserved for complications like perforation.

Q: A 26-year-old male presents with acute right lower quadrant abdominal pain. Appendicitis is suspected, and an ultrasound is equivocal. What is the next most appropriate investigation?

CT scan. **Explanation:** The clinical presentation is highly suggestive of **Acute Appendicitis**. In cases where the clinical diagnosis is uncertain or the initial ultrasound (USG) is equivocal, **Contrast-Enhanced Computed Tomography (CECT)** is the gold standard and the next most appropriate investigation. **1. Why CT Scan is the Correct Answer:** CT scan has a very high sensitivity (>94%) and specificity (>95%) for diagnosing appendicitis. It is superior to USG in identifying secondary signs (fat stranding, phlegmon, or abscess) and visualizing a retrocecal appendix, which is often missed on ultrasound. In adult males and non-pregnant females, it is the investigation of choice to confirm the diagnosis and rule out differentials. **2. Why Other Options are Incorrect:** * **Plain X-ray:** It is non-specific. While it may show a fecalith (in <10% of cases) or localized ileus, it cannot confirm or exclude appendicitis. Its primary use is to rule out perforation (pneumoperitoneum). * **Serum ESR:** This is a non-specific marker of inflammation. While it may be elevated, it does not provide a localized diagnosis and cannot differentiate appendicitis from other inflammatory conditions. * **MRI Abdomen:** While highly accurate, MRI is expensive and not readily available in emergency settings. It is typically reserved as the second-line investigation for **pregnant women** or pediatric patients when USG is inconclusive, to avoid radiation. **Clinical Pearls for NEET-PG:** * **Most common position of the appendix:** Retrocecal (74%). * **Most common cause of appendicitis:** Fecalith (adults); Lymphoid hyperplasia (children). * **Alvarado Score:** A clinical scoring system where a score of **≥7** is highly suggestive of appendicitis. * **Investigation of Choice (IOC):** USG is the initial investigation (especially in children/pregnant women), but **CT scan** is the most accurate and definitive investigation in adults.

Q: Which of the following is a manifestation of carcinoma of the stomach?

All of the above. **Explanation:** Carcinoma of the stomach is known for its propensity to present with various paraneoplastic syndromes and signs of distant metastasis due to its aggressive nature and late clinical presentation. * **Troisier’s Sign (Option A):** This refers to the clinical finding of a palpable, hard, non-tender left supraclavicular lymph node (**Virchow’s node**). It indicates the spread of abdominal malignancy (most commonly gastric cancer) via the thoracic duct. * **Trousseau’s Syndrome (Option B):** This is a paraneoplastic manifestation characterized by **migratory thrombophlebitis**. It occurs due to the release of procoagulants (like mucin) from the adenocarcinoma, leading to recurrent blood clots in superficial veins at various sites. * **Irish Node (Option C):** This refers to the enlargement of the **left anterior axillary lymph node**, signifying lymphatic spread from a gastric malignancy. Since all three clinical features are recognized manifestations of advanced or metastatic gastric carcinoma, **Option D (All of the above)** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** * **Sister Mary Joseph’s Nodule:** Palpable nodule at the umbilicus due to metastasis (most common in gastric, ovarian, or pancreatic cancer). * **Krukenberg Tumor:** Metastasis to the ovaries (classically showing signet ring cells). * **Blumer’s Shelf:** A shelf-like palpable mass in the rectovesical or rectouterine pouch (Pouch of Douglas) on rectal examination, indicating peritoneal drop metastasis. * **Acanthosis Nigricans:** A sudden, diffuse onset of velvety hyperpigmentation (especially in axilla) can be a paraneoplastic sign of gastric adenocarcinoma.

Q: In the Forrest classification, which of the following is NOT associated with a high risk of bleeding?

Adherent clot. The **Forrest Classification** is a crucial endoscopic tool used to assess the risk of re-bleeding in peptic ulcer disease and to guide management. ### **Explanation of the Correct Answer** The correct answer is **C (Adherent clot)**. While an adherent clot (Forrest Grade IIb) does carry a risk of re-bleeding (approximately 20–30%), it is categorized as a **medium-risk** lesion. In contrast, active bleeding (Grade I) and a non-bleeding visible vessel (Grade IIa) are considered **high-risk** lesions that mandate immediate endoscopic intervention. ### **Analysis of Incorrect Options** * **B. Visible pulsatile bleeding (Grade Ia):** This represents an active arterial spurt. It has the highest risk of re-bleeding (up to 90%) and requires urgent hemostasis. * **D. Visible oozing from a vessel (Grade Ib):** This represents active venous or capillary oozing. It is a high-risk lesion with a re-bleeding rate of approximately 10–30% if left untreated. * **A. Visible vessel (Grade IIa):** This is a non-bleeding visible vessel. Despite the lack of active bleeding at the time of endoscopy, it carries a high risk of re-bleeding (40–50%) and requires prophylactic endoscopic treatment. ### **NEET-PG High-Yield Pearls** | Grade | Endoscopic Finding | Re-bleeding Risk | Management | | :--- | :--- | :--- | :--- | | **Ia** | Arterial spurting | High (90%) | Endoscopic Rx | | **Ib** | Oozing | High (10-30%) | Endoscopic Rx | | **IIa** | Visible vessel | High (40-50%) | Endoscopic Rx | | **IIb** | Adherent clot | Medium (20-30%) | Consider irrigation | | **IIc** | Flat spot (Hematin) | Low (5-10%) | Medical Rx | | **III** | Clean base ulcer | Very Low (<5%) | Medical Rx / Discharge | * **Management Tip:** Grades Ia, Ib, and IIa always require endoscopic therapy (e.g., clips, thermal, or dual therapy). Grade III ulcers can often be managed with oral PPIs and early discharge.

Q: All of the following statements about Esophageal carcinoma are true, EXCEPT:

Pernicious anemia is a risk factor. **Explanation:** **1. Why Pernicious Anemia is the Correct Answer (The Exception):** Pernicious anemia is an autoimmune condition characterized by vitamin B12 deficiency due to a lack of intrinsic factor. It is a well-established risk factor for **Gastric Adenocarcinoma** and **Gastric Carcinoid tumors**, but it has **no clinical association with Esophageal Carcinoma**. Therefore, statement D is the false statement. **2. Analysis of Incorrect Options:** * **A. More common in Men:** True. Both Squamous Cell Carcinoma (SCC) and Adenocarcinoma show a strong male predilection (often cited as a 3:1 to 4:1 ratio). * **B. Adenocarcinoma is on the rise:** True. While SCC remains the most common type worldwide, the incidence of Adenocarcinoma is rapidly increasing in Western countries and urban India, primarily due to the rising prevalence of obesity and GERD (leading to Barrett’s Esophagus). * **C. Most common in the elderly:** True. Esophageal cancer is a disease of aging, with the peak incidence typically occurring in the 6th and 7th decades of life. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Globally, the middle third (SCC); for Adenocarcinoma, it is the lower third. * **Risk Factors for SCC:** Smoking, Alcohol, Achalasia Cardia, Tylosis (100% risk), Plummer-Vinson Syndrome, and Lye ingestion. * **Risk Factors for Adenocarcinoma:** GERD, Barrett’s Esophagus (metaplasia), Obesity, and Smoking. * **Investigation of Choice:** Upper GI Endoscopy (UGIE) with biopsy. * **Staging:** Endoscopic Ultrasound (EUS) is the most accurate for 'T' and 'N' staging.

Question 1

Which of the following vessels is most commonly involved in hemorrhage from a duodenal ulcer?

Accepted Answer

Gastroduodenal artery

Answer

Inferior vena cava

Answer

Superior mesenteric artery

Answer

Inferior pancreaticoduodenal artery

Question 2

What is a characteristic feature of jejunal diverticula?

Accepted Answer

Impaired vitamin B12 absorption

Answer

Impaired folate absorption

Answer

Impaired ferritin absorption

Answer

Positive urea breath test

Question 3

A 26-year-old male presents with acute right lower quadrant abdominal pain. Appendicitis is suspected, and an ultrasound is equivocal. What is the next most appropriate investigation?

Accepted Answer

CT scan

Answer

Plain X-ray

Answer

Serum ESR

Answer

MRI abdomen

Question 4

A middle-aged patient presents with symptoms suggestive of pathology involving the right hemidiaphragm. All of the following are possible diagnoses except:

Accepted Answer

Acute cholecystitis

Answer

Subphrenic abscess

Answer

Pyogenic liver abscess

Answer

Amoebic liver abscess in the right lobe

Question 5

Why does acute appendicitis in elderly patients and in children generally have a worse prognosis?

Accepted Answer

The omentum and peritoneal cavity appear to be less efficient in localizing the disease in these age groups.

Answer

The appendix is retrocecal.

Answer

The appendix is in the perineal position.

Answer

The appendix is in the pelvic position.

Question 6

A 56-year-old woman has not passed stools for the last 14 days. X-ray shows no air-fluid levels. What is the probable diagnosis?

Accepted Answer

Intestinal pseudo-obstruction

Answer

Paralytic ileus

Answer

Aganglionosis of the colon

Answer

Duodenal obstruction

Question 7

Which of the following is a manifestation of carcinoma of the stomach?

Accepted Answer

All of the above

Answer

Troisier's sign

Answer

Trousseau's syndrome

Answer

Irish node

Question 8

Regarding abdominal cocoon, all statements are true except?

Accepted Answer

Associated with liver fibrosis.

Answer

Common in young girls.

Answer

Fibrosis of the small bowel and stomach.

Answer

Chronic peritonitis is seen.

Question 9

In the Forrest classification, which of the following is NOT associated with a high risk of bleeding?

Accepted Answer

Adherent clot

Answer

Visible vessel

Answer

Visible pulsatile bleeding

Answer

Visible oozing from a vessel

Question 10

All of the following statements about Esophageal carcinoma are true, EXCEPT:

Accepted Answer

Pernicious anemia is a risk factor

Answer

More common in Men

Answer

Adenocarcinoma is on the rise

Answer

Most common in the elderly

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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