Gastrointestinal Surgery Practice Questions

Q: At surgery for a right inguinal hernia, a 72-year-old man is found to have a hernia sac that is not independent of the bowel wall. The cecum forms part of the wall of the sac. Such a hernia is properly referred to as which of the following?

Sliding. **Explanation:** The correct answer is **Sliding Hernia**. A sliding hernia (hernia en glissade) occurs when a retroperitoneal organ (most commonly the **cecum** on the right or the **sigmoid colon** on the left) drags its overlying peritoneum with it into the inguinal canal. Consequently, the organ itself forms part of the posterior or lateral wall of the hernia sac, rather than being entirely contained within it. This is a crucial surgical distinction because any attempt to ligate the sac at the internal ring (high ligation) without recognizing the "sliding" component can lead to accidental injury to the bowel or its blood supply. **Analysis of Incorrect Options:** * **Incarcerated:** This refers to a hernia where the contents are trapped and cannot be reduced into the abdominal cavity. While a sliding hernia can be incarcerated, the term specifically describes the *state* of the contents, not the *anatomical composition* of the sac wall. * **Irreducible:** This is a clinical term synonymous with incarceration. It indicates that the hernia contents cannot be manually pushed back. * **Richter’s Hernia:** This occurs when only a portion of the circumference of the bowel wall (usually the antimesenteric border) is trapped within the hernia sac. It is dangerous because strangulation can occur without causing complete intestinal obstruction. **NEET-PG High-Yield Pearls:** * **Most common organ involved:** Bladder (especially in direct hernias) or Sigmoid colon (left side) and Cecum (right side). * **Clinical Clue:** Suspect a sliding hernia in elderly males with large, long-standing globular inguinal hernias. * **Surgical Management:** High ligation of the sac is contraindicated. The sac is partially excised, and the "sliding" organ is replaced into the extraperitoneal space (Bevan’s technique).

Q: What is true about strangulation of the intestine?

Venous blood flow is usually affected first.. **Explanation:** In intestinal obstruction, **strangulation** occurs when the blood supply to the trapped segment of the bowel is compromised. The correct answer is **B** because of the anatomical and physiological differences between veins and arteries. 1. **Why Option B is correct:** Veins have thinner walls and lower intraluminal pressure compared to thick-walled, high-pressure arteries. When a loop of bowel is constricted (e.g., in a hernia or volvulus), the external pressure first exceeds the low venous pressure, leading to **venous congestion** and edema. As the pressure continues to rise due to ongoing arterial inflow and worsening edema, it eventually exceeds the arterial pressure, leading to ischemia. 2. **Why Option A is incorrect:** Arterial flow is more resilient due to higher pressure and muscular walls; it is only compromised *after* venous outflow is obstructed. 3. **Why Option C & D are incorrect:** By definition, strangulation implies a compromise in blood flow. If left untreated, this leads to irreversible tissue death, known as **gangrene**, followed by perforation and peritonitis. **Clinical Pearls for NEET-PG:** * **Earliest Sign:** The earliest sign of strangulation is often **tachycardia** and localized tenderness. * **Cardinal Features:** Continuous pain (rather than colicky), fever, leukocytosis, and metabolic acidosis suggest strangulation. * **Pathology:** The sequence is: Venous obstruction → Edema → Arterial compromise → Hemorrhagic infarction → Gangrene. * **Management:** Strangulation is a surgical emergency requiring immediate laparotomy and resection of the non-viable segment.

Q: Which surgical repair is appropriate for a patient with a femoral hernia?

McVay repair. **Explanation:** The correct answer is **D. McVay repair**. **Why McVay repair is correct:** A femoral hernia occurs when abdominal contents protrude through the femoral canal, which is located medial to the femoral vein and inferior to the inguinal ligament. The **McVay (Cooper’s ligament) repair** is the classic tissue-based procedure for femoral hernias. In this technique, the conjoined tendon is sutured to **Cooper’s ligament** (pectineal ligament) rather than the inguinal ligament. This effectively bridges the gap and obliterates the femoral canal, addressing the anatomical defect responsible for the hernia. **Why the other options are incorrect:** * **A. Bassini repair:** This is a classic inguinal hernia repair where the conjoined tendon is sutured to the **inguinal ligament**. It does not close the femoral canal and is therefore ineffective for femoral hernias. * **B. Hunter’s repair:** This is not a recognized standard surgical repair for hernias. (Note: John Hunter is famous for Hunter’s canal/adductor canal, but not a hernia repair). * **C. Shouldice repair:** This is a multi-layer imbrication of the posterior wall of the inguinal canal. While it is the "gold standard" for tissue-based **inguinal** hernia repair, it does not address the femoral space. **High-Yield Clinical Pearls for NEET-PG:** * **Anatomy:** The femoral canal is bounded medially by the **lacunar ligament** and laterally by the **femoral vein**. * **Epidemiology:** Femoral hernias are more common in **females** (due to a wider pelvis), but inguinal hernias remain the most common hernia overall in both sexes. * **Risk:** Femoral hernias have the **highest risk of strangulation** (approx. 40%) due to the rigid boundaries of the femoral ring. * **Modern Approach:** While McVay is the classic answer, modern practice often utilizes **Laparoscopic (TEP/TAPP)** mesh repairs or the **Plug and Patch** technique.

Q: Trichobezoar is pathological ingestion of:

Hair. **Explanation:** A **bezoar** is a solid mass of indigestible material that accumulates in the digestive tract, most commonly in the stomach. **1. Why "Hair" is correct:** The term **Trichobezoar** is derived from the Greek word *thrix* (hair). It refers to a hairball formed in the stomach due to the chronic ingestion of hair. This is almost exclusively associated with two psychiatric conditions: * **Trichotillomania:** An impulse-control disorder characterized by the compulsive urge to pull out one's own hair. * **Trichophagia:** The compulsive eating of hair. Over time, the hair escapes digestion and peristalsis, becoming trapped in the gastric mucosal folds and forming a large, matted mass. **2. Why other options are incorrect:** * **Vegetable matter (Phytobezoar):** This is the most common type of bezoar, composed of indigestible cellulose, fiber, and lignin (often from persimmons or celery). * **Coins/Stones:** These are classified as **Foreign Bodies**. While their ingestion is common in children or patients with **Pica**, they do not typically form "bezoars" (which imply a mass formed by the accumulation of smaller particles). A bezoar specifically made of stones is rare and termed a *Lithobezoar*. **3. High-Yield Clinical Pearls for NEET-PG:** * **Rapunzel Syndrome:** An extreme form of trichobezoar where the "tail" of the hair mass extends from the stomach into the small intestine, potentially causing obstruction. * **Clinical Presentation:** Often presents with epigastric pain, nausea, vomiting, halitosis (foul breath), and a palpable abdominal mass. * **Diagnosis:** Gold standard is **Upper GI Endoscopy**. * **Treatment:** Large trichobezoars usually require surgical removal (laparotomy) as they are resistant to enzymatic dissolution.

Q: A mesenteric cyst typically moves in relation to the mesentery in which of the following ways?

Moves perpendicular to the mesentery. **Explanation:** The characteristic mobility of a mesenteric cyst is a classic clinical sign known as **Tillaux’s Sign**. This sign is fundamental in differentiating mesenteric masses from other intra-abdominal swellings. **1. Why Option B is Correct:** Mesenteric cysts are located between the two layers of the mesentery. The mesentery is attached to the posterior abdominal wall along a line running from the left side of the second lumbar vertebra to the right sacroiliac joint (the root of the mesentery). Because of this anatomical tethering, the cyst can be moved freely in a direction **perpendicular** to the line of the mesenteric attachment (i.e., from right to left). However, its movement is restricted along the longitudinal axis (parallel) of the mesentery because it is anchored by the root. **2. Why the other options are incorrect:** * **Option A:** Movement parallel to the mesentery is restricted by the root of the mesentery and the tension of the superior mesenteric vessels. * **Option C:** Mesenteric cysts are typically primary lesions (often lymphatic in origin, like cystic lymphangiomas) rather than secondary tumors (metastases), though secondary malignant involvement of the mesentery can occur. * **Option D:** A fixed and immobile mass usually suggests a retroperitoneal tumor (e.g., sarcoma) or a malignancy that has infiltrated the posterior abdominal wall. **Clinical Pearls for NEET-PG:** * **Tillaux’s Sign:** A triad consisting of a fluctuant swelling in the umbilical region, great mobility in a plane perpendicular to the mesentery, and a zone of resonance (tympanitic note) all around the cyst due to surrounding bowel loops. * **Most common site:** The mesentery of the **ileum** is the most frequent location. * **Treatment of choice:** Complete **enucleation** is preferred. If the blood supply to the adjacent bowel is compromised, bowel resection with end-to-end anastomosis is required.

Question 1

At surgery for a right inguinal hernia, a 72-year-old man is found to have a hernia sac that is not independent of the bowel wall. The cecum forms part of the wall of the sac. Such a hernia is properly referred to as which of the following?

Accepted Answer

Sliding

Answer

Incarcerated

Answer

Irreducible

Answer

Richter's

Question 2

Which of the following statements regarding Meckel's Diverticulum is false?

Accepted Answer

Intestinal obstruction is the most common presentation in children.

Answer

It is a true diverticulum.

Answer

Gastric mucosa is the most common heterotopic mucosa seen.

Answer

Treatment is diverticulectomy.

Question 3

What is true about strangulation of the intestine?

Accepted Answer

Venous blood flow is usually affected first.

Answer

Arterial blood flow is affected first.

Answer

Blood flow remains normal.

Answer

Gangrene does not occur.

Question 4

Which surgical repair is appropriate for a patient with a femoral hernia?

Accepted Answer

McVay repair

Answer

Bassini repair

Answer

Hunter's repair

Answer

Shouldice repair

Question 5

Which of the following is NOT a feature of Meckel's diverticulum?

Accepted Answer

Located on the antimesenteric side

Answer

Remnant of the vitelline duct

Answer

Contains ectopic gastric and pancreatic mucosa

Answer

Littre hernia is a Meckel's diverticulum within a hernial sac

Question 6

Which of the following statements regarding Barrett's esophagus is true?

Accepted Answer

It requires endoscopic surveillance with biopsy every 2 years.

Answer

It is treated with a histamine antagonist.

Answer

It is treated with a proton pump inhibitor.

Answer

It is treated with Helicobacter pylori triple therapy.

Question 7

Trichobezoar is pathological ingestion of:

Accepted Answer

Hair

Answer

Vegetable matter

Answer

Coins

Answer

Stones

Question 8

A mesenteric cyst typically moves in relation to the mesentery in which of the following ways?

Accepted Answer

Moves perpendicular to the mesentery

Answer

Moves parallel to the mesentery

Answer

Is a secondary tumor

Answer

Is fixed and immobile

Question 9

What is a trichobezoar?

Accepted Answer

A hairball in the stomach, often seen in psychiatric patients.

Answer

A tumor of the stomach.

Answer

Tuberculosis of the bowel.

Answer

A collection of worms in the stomach.

Question 10

All of the following statements about Zenker's diverticulum are true, except?

Accepted Answer

Outpouching of the anterior pharyngeal wall, occurring just above the cricopharyngeus muscle

Answer

Acquired diverticulum

Answer

False diverticulum

Answer

Lateral X-rays on barium swallow are often diagnostic

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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