Gastrointestinal Surgery Practice Questions

Q: During 24-hour esophageal pH monitoring, what pH level is considered an episode of acid reflux?

Less than 4. **Explanation:** The correct answer is **C. Less than 4**. **Underlying Medical Concept:** 24-hour ambulatory esophageal pH monitoring is the "gold standard" for diagnosing Gastroesophageal Reflux Disease (GERD). The threshold of **pH < 4** is used because it is the point at which esophageal symptoms (like heartburn) typically occur and where pepsin becomes enzymatically active, leading to mucosal damage. An "acid reflux episode" is defined as any drop in esophageal pH below 4.0. **Analysis of Options:** * **A & B (Less than 2 or 3):** These levels represent highly acidic environments (typical of the stomach), but using these as a cutoff would be too specific and would miss a significant number of clinically relevant reflux episodes, leading to a high false-negative rate. * **D (Less than 5):** While pH 5 is acidic, it is not low enough to cause significant mucosal injury or reliably trigger symptoms. Using this threshold would decrease the specificity of the test, leading to over-diagnosis. **High-Yield Clinical Pearls for NEET-PG:** * **DeMeester Score:** This is a composite score used to quantify the severity of GERD based on six parameters measured during pH monitoring. A score **>14.72** is considered abnormal. * **Bravo pH Monitoring:** A wireless capsule method that allows for 48–96 hours of monitoring and is better tolerated by patients than the transnasal catheter. * **Impedance-pH Monitoring:** This is the preferred test for patients with persistent symptoms on PPIs, as it can detect **non-acid reflux** (pH > 4) by measuring changes in electrical resistance. * **Indications:** pH monitoring is essential before anti-reflux surgery (e.g., Nissen Fundoplication) to confirm the diagnosis, especially if endoscopy is normal.

Q: All of the following indicate early gastric cancer except?

Involvement of mucosa, submucosa and muscularis. ### Explanation **Concept:** Early Gastric Cancer (EGC) is defined strictly by the **depth of invasion**, not by the presence of lymph node metastasis or the size of the tumor. According to the Japanese Society of Gastroenterological Endoscopy, EGC is a carcinoma limited to the **mucosa (T1a)** or **submucosa (T1b)**, regardless of lymph node status. **Why Option C is the Correct Answer:** Involvement of the **muscularis propria** (T2) automatically classifies the tumor as **Advanced Gastric Cancer**. Once the tumor penetrates beyond the submucosa into the muscular layer, it no longer meets the criteria for "early" cancer, even if it is small in size. **Analysis of Other Options:** * **Option A & B:** These are the classic definitions of EGC. The tumor is confined to the innermost layers (mucosa and submucosa). * **Option D:** This is a common "trap" in NEET-PG. By definition, EGC **can** have lymph node involvement (approximately 10-20% of cases). The presence of regional lymph node metastasis does not change the "Early" designation as long as the primary tumor is limited to the mucosa or submucosa. **High-Yield Clinical Pearls for NEET-PG:** * **Prognosis:** EGC has an excellent 5-year survival rate (>90%). * **Japanese Classification (Morphology):** * Type I: Protruded * Type II: Superficial (IIa: Elevated, IIb: Flat, IIc: Depressed) * Type III: Excavated (Most common type associated with ulceration) * **Treatment:** Endoscopic Submucosal Dissection (ESD) or Endoscopic Mucosal Resection (EMR) is indicated for T1a lesions with favorable histology. * **Most Common Site:** The lesser curvature of the antrum is the most frequent site for EGC.

Q: Operability in carcinoma of the stomach is indicated by all except?

Krukenberg tumour. **Explanation:** In the management of gastric carcinoma, "operability" refers to whether the primary tumor and its associated lymphatic spread can be removed with curative intent (R0 resection). **Why Krukenberg Tumour is the correct answer:** A **Krukenberg tumour** represents metastatic spread to the ovaries, typically via transcoelomic (peritoneal) seeding or retrograde lymphatic spread. This signifies **Stage IV (metastatic) disease**. In gastric cancer, the presence of distant metastases (including the pouch of Douglas, Virchow’s node, or Krukenberg tumours) renders the disease **inoperable for cure**. Surgery in such cases is restricted to palliative measures only. **Analysis of Incorrect Options:** * **A. Involvement of omental nodes:** These are considered regional lymph nodes (N1/N2). They are routinely removed during a standard D1 or D2 gastrectomy and do not preclude curative surgery. * **B. Involvement of lymph nodes at the celiac axis:** These are Station 9 nodes. In a **D2 gastrectomy**, which is the standard of care for operable gastric cancer, these nodes are resected. While they indicate advanced local disease, they do not signify systemic metastasis. * **C. Lymph node at porta hepatis:** These are Station 12 nodes. While technically challenging, they are considered regional nodes in certain classifications and can be removed during an extended D2 or D3 dissection. **Clinical Pearls for NEET-PG:** * **Resectability vs. Operability:** Resectability refers to the technical ability to remove the tumor; Operability refers to the patient's fitness and the oncological benefit of the procedure. * **Sister Mary Joseph’s Nodule:** Periumbilical metastasis; indicates inoperability. * **Blumer’s Shelf:** Palpable mass in the rectovesical or recto-uterine pouch; indicates inoperability. * **Standard of Care:** D2 Gastrectomy is the recommended surgical procedure for resectable gastric cancer.

Q: What is the least common complication of peptic ulcer?

Gastric Outlet Obstruction. ### Explanation In the context of peptic ulcer disease (PUD), complications are categorized by their frequency and clinical presentation. **1. Why Gastric Outlet Obstruction (GOO) is the correct answer:** Gastric Outlet Obstruction is the **least common** complication of peptic ulcer disease. It occurs in approximately 2–5% of cases. It is typically a result of chronic duodenal ulcers causing cicatrization (scarring) and fibrosis of the pyloric canal, or acute inflammation and edema. With the advent of Proton Pump Inhibitors (PPIs) and *H. pylori* eradication therapy, the incidence of GOO has significantly declined compared to other complications. **2. Analysis of Incorrect Options:** * **Bleeding (Option B):** This is the **most common** complication of peptic ulcer disease. It occurs due to the erosion of a blood vessel (most commonly the gastroduodenal artery in posterior duodenal ulcers). * **Perforation (Option C):** This is the **second most common** complication. It is an acute surgical emergency, typically involving the anterior wall of the duodenum. * **Epigastric Pain (Option D):** This is the most common **symptom/clinical presentation** of a peptic ulcer, rather than a complication. However, in the context of "complications," it is frequently present but does not rank as the "least common" pathological sequela. **Clinical Pearls for NEET-PG:** * **Most common complication:** Bleeding. * **Most common site of perforation:** Anterior wall of the first part of the duodenum. * **Most common artery involved in bleeding:** Gastroduodenal artery (posterior duodenal ulcer). * **Metabolic abnormality in GOO:** Hypochloremic, hypokalemic, metabolic alkalosis with **paradoxical aciduria**. * **Investigation of choice for GOO:** Upper GI Endoscopy (to rule out malignancy).

Q: Which of the following is a true statement about pelvic abscess?

A pelvic abscess may spontaneously drain via the rectum.. **Explanation:** **1. Why Option C is correct:** A pelvic abscess is a localized collection of pus in the most dependent part of the peritoneal cavity (the Pouch of Douglas in females or the rectovesical pouch in males). Due to its anatomical proximity to the rectum, the increasing pressure within the abscess can cause the wall to thin and eventually perforate into the rectal lumen. This results in **spontaneous drainage**, often characterized by the patient experiencing a sudden discharge of pus and mucus per rectum, followed by a relief of symptoms (diarrhea and tenesmus). **2. Why the other options are incorrect:** * **Option A:** Pelvic abscess is actually the **most common** site for an intra-peritoneal abscess because gravity causes infected peritoneal fluid (from appendicitis, diverticulitis, or PID) to track down into the pelvis. * **Option B:** Pyothorax (pus in the pleural cavity) is typically associated with **subphrenic abscesses** (via lymphatic spread or direct diaphragmatic involvement), not pelvic abscesses. * **Option D:** While CT is the gold standard for diagnosis, a **full bladder** can actually obscure pelvic anatomy or be mistaken for a fluid collection. For optimal imaging, the bladder should be emptied, or oral/rectal contrast should be used to differentiate bowel loops from the abscess. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Triad:** Fever, pelvic pain, and **"mucus diarrhea"** (due to rectal irritation). * **Diagnosis:** Digital Rectal Examination (DRE) is the most important bedside test, revealing a **boggy, tender swelling** on the anterior rectal wall. * **Treatment:** If it doesn't drain spontaneously, surgical drainage is performed via the site of maximal softening (**Proctotomy** in males/females or **Posterior Colpotomy** in females).

Q: About 6-8 hours after peptic perforation, the disappearance of abdominal wall rigidity is primarily due to which of the following?

Dilution of acid in the peritoneal cavity. **Explanation:** The clinical presentation of a perforated peptic ulcer typically follows three distinct stages: the stage of perforation (prostration), the stage of reaction (illusion), and the stage of generalized peritonitis. **Why Option C is correct:** When a peptic ulcer perforates, highly acidic gastric juice (pH < 2) enters the peritoneal cavity, causing immediate and intense **chemical peritonitis**. This results in the classic "board-like" abdominal rigidity. After approximately 6–12 hours, the body’s inflammatory response causes an influx of **peritoneal exudate** (serous fluid). This fluid **dilutes the gastric acid**, reducing its irritant effect on the peritoneum. Consequently, the abdominal pain and rigidity may temporarily diminish, leading to a "period of illusion" where the patient appears to improve clinically before progressing to bacterial peritonitis. **Why other options are incorrect:** * **A & B:** While acid secretion may decrease due to physiological stress and the patient may recover from initial neurogenic shock, these are secondary effects and do not explain the localized resolution of peritoneal irritation. * **D:** The reflex arc (muscle guarding) does not "fatigue." Rigidity only disappears if the stimulus (acid) is neutralized/diluted or if the patient reaches a state of end-stage septic shock with muscle flaccidity. **Clinical Pearls for NEET-PG:** * **Stage of Illusion:** This is a dangerous diagnostic trap where the patient feels better, but the underlying pathology is worsening. * **Gas under diaphragm:** Seen in ~70-80% of cases on an upright X-ray. * **Treatment of Choice:** Emergency laparotomy and **Graham’s Omental Patch** repair. * **Most common site:** Anterior wall of the first part of the duodenum (D1).

Q: Which is the most hemorrhagic tumor?

Leiomyosarcoma of the stomach. **Explanation:** **Leiomyosarcoma of the stomach** is the correct answer because it is a mesenchymal tumor characterized by high vascularity and a tendency for central necrosis. As the tumor grows, it often outstrips its blood supply, leading to central liquefaction and the formation of a "cavitated" lesion. When this cavity erodes into the gastric lumen, it results in massive, life-threatening upper gastrointestinal hemorrhage. Clinically, these patients often present with hematemesis or melena rather than the chronic occult blood loss typically seen in epithelial malignancies. **Why the other options are incorrect:** * **Carcinoma of the stomach (Adenocarcinoma):** While this is the most common gastric malignancy, it typically presents with chronic, low-grade bleeding (occult blood) leading to iron deficiency anemia, rather than acute massive hemorrhage. * **Adenocarcinoma of the gallbladder:** This tumor usually presents with jaundice, weight loss, or pain. While it can cause hemobilia in rare advanced stages, it is not primarily known for being highly hemorrhagic. * **Carcinoma of the pancreas:** This typically presents with obstructive jaundice (head of pancreas) or vague abdominal pain. Bleeding is rare unless there is secondary involvement of the duodenum or splenic vein thrombosis leading to gastric varices. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site for Leiomyosarcoma in GI tract:** Stomach. * **Radiological Sign:** A "Torr-like" or large exophytic mass with central cavitation on CT is highly suggestive of a mesenchymal tumor (GIST or Leiomyosarcoma). * **GIST vs. Leiomyosarcoma:** Most tumors previously labeled as leiomyosarcomas are now classified as **Gastrointestinal Stromal Tumors (GIST)**, which are CD117 (c-kit) positive. Both are notorious for presenting with significant GI bleeding. * **Most common presentation of Gastric Leiomyosarcoma:** Hematemesis/Melena.

Q: According to the Forrest classification, what stage is indicated by a visible clot at the ulcer base?

2B. The **Forrest Classification** is a standardized endoscopic grading system used to assess the risk of re-bleeding in peptic ulcer disease. It is a high-yield topic for NEET-PG as it dictates management strategies. ### **Explanation of the Correct Answer** **Option C (2B)** is correct because a **visible adherent clot** at the ulcer base is classified as Forrest Grade 2B. This indicates a recent hemorrhage where the clot is firmly attached to the ulcer bed and cannot be dislodged by gentle suction or water irrigation. The risk of re-bleeding for Grade 2B is approximately 20-30%. ### **Analysis of Incorrect Options** * **Option A (1A):** Represents **Active Spurt** (Arterial bleeding). This is an emergency with the highest risk of re-bleeding (up to 90%). * **Option B (2A):** Represents a **Non-bleeding Visible Vessel**. This indicates a high risk of re-bleeding (approx. 50%) and requires endoscopic intervention. * **Option D (3):** Represents a **Clean Ulcer Base** without any signs of recent hemorrhage. It has the lowest risk of re-bleeding (<5%) and can usually be managed with oral PPIs. ### **Clinical Pearls for NEET-PG** * **Grade 1 (Active):** 1A (Spurting), 1B (Oozing). * **Grade 2 (Recent):** 2A (Visible vessel), 2B (Adherent clot), 2C (Hematin-plugged/Black base). * **Grade 3 (Healing):** Clean base. * **Management:** Grades **1A, 1B, and 2A** always require endoscopic therapy (e.g., clipping, thermal, or injection). Grade **2B** management is controversial but often involves clot removal to treat the underlying vessel. Grades **2C and 3** generally do not require endoscopic intervention.

Q: Least chances of complication like dumping syndrome and diarrhea are seen in which of the following surgical conditions?

Parietal cell vagotomy. **Explanation:** The incidence of post-vagotomy complications like **dumping syndrome** and **diarrhea** is directly related to the extent of denervation and the loss of the pyloric sphincter mechanism. **1. Why Parietal Cell Vagotomy (PCV) is correct:** Parietal Cell Vagotomy (also known as Highly Selective Vagotomy) is the most anatomical approach. It denervates only the acid-secreting proximal two-thirds of the stomach while **preserving the nerve of Latarjet**, which supplies the antrum and pylorus. Because the pyloric sphincter remains intact and functional, gastric emptying of solids remains controlled, and there is no rapid bolus entry into the duodenum. Consequently, the risk of dumping syndrome and diarrhea is minimal (<1%). **2. Analysis of Incorrect Options:** * **Truncal Vagotomy (TV) with Drainage (B & D):** TV denervates the entire stomach and the hepatobiliary-celiac axis. It causes gastric stasis, necessitating a drainage procedure (Pyloroplasty or Gastrojejunostomy). These procedures destroy or bypass the pylorus, leading to rapid gastric emptying of hypertonic fluids (Dumping) and increased bile acid flow to the colon (Post-vagotomy diarrhea). * **Antrectomy with Truncal Vagotomy (C):** This procedure has the highest success rate for ulcer healing but the **highest rate of complications**. Removing the antrum and the pylorus significantly alters gastric reservoir function and emptying kinetics. **Clinical Pearls for NEET-PG:** * **Gold Standard for Duodenal Ulcer (Elective):** Parietal Cell Vagotomy (lowest morbidity, though higher recurrence rate than TV). * **Post-vagotomy Diarrhea:** Most common after Truncal Vagotomy (approx. 5-10%). * **Dumping Syndrome:** Primarily managed conservatively (high protein, low carb, small frequent meals). Octreotide is the drug of choice for refractory cases. * **Recurrence Rate:** PCV (10-15%) > TV + Pyloroplasty (5-10%) > TV + Antrectomy (1%).

Question 1

During 24-hour esophageal pH monitoring, what pH level is considered an episode of acid reflux?

Accepted Answer

Less than 4

Answer

Less than 2

Answer

Less than 3

Answer

Less than 5

Question 2

All of the following indicate early gastric cancer except?

Accepted Answer

Involvement of mucosa, submucosa and muscularis

Answer

Involvement of mucosa

Answer

Involvement of mucosa and submucosa

Answer

Involvement of mucosa, submucosa and adjacent lymph nodes

Question 3

Operability in carcinoma of the stomach is indicated by all except?

Accepted Answer

Krukenberg tumour

Answer

Involvement of omental nodes

Answer

Involvement of lymph nodes at the celiac axis

Answer

Lymph node at porta hepatis

Question 4

What is the least common complication of peptic ulcer?

Accepted Answer

Gastric Outlet Obstruction

Answer

Bleeding

Answer

Perforation

Answer

Epigastric Pain

Question 5

Which of the following is a true statement about pelvic abscess?

Accepted Answer

A pelvic abscess may spontaneously drain via the rectum.

Answer

A pelvic abscess is an uncommon cause of an intra-peritoneal abscess.

Answer

A pelvic abscess is associated with pyothorax.

Answer

A pelvic abscess can be identified by CT scan if the bladder is full.

Question 6

About 6-8 hours after peptic perforation, the disappearance of abdominal wall rigidity is primarily due to which of the following?

Accepted Answer

Dilution of acid in the peritoneal cavity

Answer

Cessation of acid secretion in the stomach

Answer

Revival from initial shock

Answer

Fatigue of the reflex arc

Question 7

Which is the most hemorrhagic tumor?

Accepted Answer

Leiomyosarcoma of the stomach

Answer

Carcinoma of the stomach

Answer

Adenocarcinoma of the gallbladder

Answer

Carcinoma of the pancreas

Question 8

According to the Forrest classification, what stage is indicated by a visible clot at the ulcer base?

Accepted Answer

2B

Answer

1A

Answer

2A

Answer

3

Question 9

Least chances of complication like dumping syndrome and diarrhea are seen in which of the following surgical conditions?

Accepted Answer

Parietal cell vagotomy

Answer

Truncal vagotomy and Gastrojejunostomy

Answer

Antrectomy with truncal vagotomy

Answer

Vagotomy with pyloroplasty

Question 10

All of the following are complications of ileal resection, except:

Accepted Answer

Iron deficiency anemia

Answer

Megaloblastic anemia

Answer

Gastric hypersecretion

Answer

Malabsorption syndrome

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?