Gastrointestinal Surgery Practice Questions

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.

Q: Which of the following statements about gastric carcinoma is incorrect?

Hematemesis is present in the majority of patients.. **Explanation:** **1. Why Option A is Incorrect (The Correct Answer):** While gastric carcinoma can cause bleeding, **hematemesis is NOT present in the majority of patients.** Most patients present with non-specific symptoms like dyspepsia, weight loss, or anemia due to chronic occult blood loss. Significant upper GI bleeding (hematemesis or melena) occurs in only about 10–15% of cases. Therefore, statement A is false. **2. Analysis of Other Options:** * **Option B (H. pylori association):** This is a **true** statement. *H. pylori* is classified as a Class I carcinogen by the WHO. It causes chronic atrophic gastritis and intestinal metaplasia, significantly increasing the risk of the intestinal type of gastric adenocarcinoma. * **Option C (D2 gastrectomy includes total gastrectomy):** This is a **true** statement regarding surgical nomenclature. A D2 gastrectomy refers to the extent of lymphadenectomy (removal of Level 1 and Level 2 lymph nodes). It can be performed as part of either a subtotal or a **total gastrectomy**, depending on the location of the tumor (e.g., proximal tumors require total gastrectomy). **Clinical Pearls for NEET-PG:** * **Most common site:** Historically the antrum, but the incidence of proximal/cardia tumors is rising. * **Most common histological type:** Adenocarcinoma (Intestinal type vs. Diffuse type/Linitis Plastica). * **Virchow’s Node:** Left supraclavicular lymphadenopathy (Troisier’s sign). * **Sister Mary Joseph’s Nodule:** Periumbilical metastasis. * **Krukenberg Tumor:** Metastasis to the ovaries (signet ring cells). * **Investigation of Choice:** Upper GI Endoscopy with biopsy. * **Staging:** Contrast-Enhanced CT (CECT) of the abdomen and chest is the standard for staging.

Q: What is the most common nutritional deficiency observed after a gastrectomy?

Iron deficiency. **Explanation:** The most common nutritional deficiency following a gastrectomy (total or subtotal) is **Iron deficiency**, affecting up to 50% of patients. **1. Why Iron Deficiency is the Correct Answer:** Iron absorption primarily occurs in the duodenum and proximal jejunum. Gastrectomy leads to iron deficiency through three main mechanisms: * **Achlorhydria:** Gastric acid is essential to convert dietary ferric iron ($Fe^{3+}$) into the more absorbable ferrous form ($Fe^{2+}$). * **Rapid Gastric Emptying:** Reduced transit time limits the duration of exposure to absorptive surfaces. * **Bypass of Duodenum:** In procedures like Billroth II, the primary site of iron absorption (the duodenum) is bypassed. **2. Analysis of Incorrect Options:** * **Vitamin B12 deficiency:** While classic, it is less common than iron deficiency. It occurs due to the loss of **Intrinsic Factor** (secreted by parietal cells), which is necessary for B12 absorption in the terminal ileum. However, the liver stores B12 for 3–5 years, so deficiency takes much longer to manifest clinically. * **Vitamin D deficiency:** This occurs due to fat malabsorption (steatorrhea) and inadequate mixing of bile/pancreatic enzymes, leading to osteomalacia. While significant, its incidence is lower than iron deficiency. * **Vitamin K deficiency:** Also a fat-soluble vitamin, its deficiency can occur but is rare because it is also synthesized by gut flora. **3. NEET-PG High-Yield Pearls:** * **Most common anemia post-gastrectomy:** Iron deficiency anemia (Microcytic Hypochromic). * **Megaloblastic anemia post-gastrectomy:** Usually due to Vitamin B12 deficiency, but can also be caused by **Folate deficiency** (due to poor intake). * **Dumping Syndrome:** The most common "post-gastrectomy syndrome" overall, managed primarily by dietary modification (small, frequent, dry meals).

Q: Howship-Romberg sign is associated with which condition?

Obturator hernia. **Explanation:** **Howship-Romberg sign** is a pathognomonic clinical finding for an **obturator hernia**. It refers to pain or paresthesia extending down the medial aspect of the thigh to the knee. This occurs because the herniated bowel sac compresses the **obturator nerve** as it passes through the narrow obturator canal. The pain is typically exacerbated by extension, adduction, or internal rotation of the hip. **Analysis of Options:** * **Obturator Hernia (Correct):** Often called the "little old lady's hernia," it is most common in elderly, multiparous, emaciated women. Because the hernia is deep, it rarely presents with a visible swelling; thus, the Howship-Romberg sign is the most significant clinical clue. * **Splenic Rupture (Incorrect):** Associated with **Kehr’s sign** (referred pain to the left shoulder due to diaphragmatic irritation by blood). * **Diaphragmatic Hernia (Incorrect):** Presents with respiratory distress and a scaphoid abdomen; it does not involve pelvic nerve compression. * **Carcinoma of the Rectum (Incorrect):** Typically presents with tenesmus, bleeding per rectum, or altered bowel habits. While it can cause pelvic pain, it does not elicit the specific Howship-Romberg sign. **High-Yield Pearls for NEET-PG:** * **Hannington-Kiff Sign:** Another sign of obturator hernia; it refers to the loss of the adductor reflex despite a preserved patellar reflex. * **Demographics:** Most common in women (F:M ratio of 6:1) due to a wider pelvis and larger obturator canal. * **Mortality:** It has the highest mortality rate of all abdominal wall hernias because it often presents late with intestinal obstruction.

Question 1

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 2

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 3

Trichobezoar is pathological ingestion of:

Accepted Answer

Hair

Answer

Vegetable matter

Answer

Coins

Answer

Stones

Question 4

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 5

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 6

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

Question 7

A patient presents with abdominal distention, nausea, and vomiting, reporting a long history of intermittent obstructive symptoms and distention. Radiological examination shows the following presentation. Which of the following statements regarding the treatment of this condition is false?

Accepted Answer

Sigmoid colectomy should be performed after confirming the diagnosis.

Answer

Management involves resuscitation followed by endoscopic detorsion.

Answer

A rigid proctoscope is a better tool than a flexible sigmoidoscope for this condition.

Answer

The risk of reoccurrence is up to 40%.

Question 8

Which of the following statements about gastric carcinoma is incorrect?

Accepted Answer

Hematemesis is present in the majority of patients.

Answer

Helicobacter pylori association is present.

Answer

D2 gastrectomy includes total gastrectomy.

Answer

All of the above are true.

Question 9

What is the most common nutritional deficiency observed after a gastrectomy?

Accepted Answer

Iron deficiency

Answer

Vitamin B12 deficiency

Answer

Vitamin D deficiency

Answer

Vitamin K deficiency

Question 10

Howship-Romberg sign is associated with which condition?

Accepted Answer

Obturator hernia

Answer

Splenic rupture

Answer

Diaphragmatic hernia

Answer

Carcinoma of the rectum

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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