Gastrointestinal Surgery Practice Questions

Q: All are features of viable bowel, except?

Presence of food. In gastrointestinal surgery, assessing bowel viability is a critical intraoperative decision, especially in cases of strangulated hernias, volvulus, or mesenteric ischemia. The viability of the bowel is determined by its physiological and anatomical integrity, not its contents. ### **Explanation of Options** * **Correct Answer (C) Presence of food:** The presence of food or fecal matter within the lumen is entirely independent of the health of the bowel wall. A necrotic, gangrenous segment of bowel can still contain food, just as a healthy segment can be empty. Therefore, it is not a criterion for viability. * **A. Vascularity:** This is the most crucial indicator. Viable bowel must have active arterial pulsations in the mesentery and show active bleeding from the cut edges. * **B. Musculature:** A viable bowel exhibits **peristalsis**. If the muscle layer is healthy, the bowel will contract when stimulated (mechanically or thermally). Loss of contractility indicates ischemia. * **D. Shiny peritoneum:** Healthy bowel has a glistening, smooth, and pinkish-red serosal surface. A non-viable bowel appears dull, black/green, or gray, indicating loss of peritoneal integrity. ### **Clinical Pearls for NEET-PG** * **Standard Criteria for Viability:** The "Triple Test" includes **Color** (Pink/Red), **Contractions** (Peristalsis), and **Circulation** (Pulsations). * **Management of Doubtful Viability:** If viability is uncertain, the bowel should be wrapped in warm, moist packs for 10–15 minutes and re-evaluated. * **Gold Standard:** While clinical judgment is standard, **Fluorescein dye** (under Wood’s lamp) or **Doppler ultrasound** can be used for objective assessment of blood flow. * **High-Yield Fact:** The first layer of the bowel wall to undergo necrosis during ischemia is the **Mucosa**, as it is the most metabolically active.

Q: Ivor Lewis operation is the treatment of choice for cancer involving which part of the esophagus?

Lower third. **Explanation:** The **Ivor Lewis procedure** (Transthoracic Esophagectomy) is the gold standard surgical approach for cancers involving the **lower third of the esophagus** and the gastroesophageal junction. **Why it is the correct choice:** The procedure involves a two-stage approach: 1. **Laparotomy:** To mobilize the stomach (the conduit) and perform a lymphadenectomy. 2. **Right Thoracotomy:** To resect the esophagus and perform an **intrathoracic anastomosis** between the esophagus and the gastric pull-up. This approach provides excellent exposure for tumors in the distal esophagus and allows for an adequate oncological clearance of mediastinal lymph nodes. **Analysis of Incorrect Options:** * **Upper third (C):** Cancers here are usually managed with definitive chemoradiotherapy. If surgery is required, a **McKeown (3-stage)** procedure is preferred to ensure a cervical anastomosis, as an intrathoracic anastomosis is technically difficult and oncologically unsafe at this level. * **Middle third (A):** While Ivor Lewis can be used, many surgeons prefer the McKeown approach for middle-third tumors to achieve a wider proximal margin and avoid the risk of a high-tension intrathoracic leak. * **Entire esophagus (D):** Total esophagectomy usually requires a three-stage (McKeown) or transhiatal approach to ensure complete removal and a cervical anastomosis. **High-Yield Clinical Pearls for NEET-PG:** * **McKeown Procedure:** 3 stages (Right Thoracotomy + Laparotomy + Neck incision). Best for upper/middle third. * **Transhiatal Esophagectomy (Orringer’s):** Blunt dissection without thoracotomy. Preferred in patients with poor pulmonary reserve but offers limited lymphadenectomy. * **Most common site of leak:** Cervical anastomosis (McKeown) has a higher leak rate, but intrathoracic leaks (Ivor Lewis) have a higher mortality rate. * **Conduit of choice:** Stomach (supplied by the Right Gastroepiploic artery).

Q: Progressive dysphagia is seen in which of the following conditions?

Carcinoma esophagus. **Explanation:** **1. Why Carcinoma Esophagus is correct:** The hallmark of **Carcinoma Esophagus** is **progressive dysphagia**, which typically follows a specific pattern: it begins with difficulty swallowing solids and eventually progresses to liquids. This occurs because the malignant tumor grows circumferentially or exophytically, causing a mechanical, fixed, and worsening obstruction of the esophageal lumen. By the time dysphagia manifests, usually more than 60% of the esophageal circumference is involved. **2. Analysis of Incorrect Options:** * **Globus hystericus:** This is a functional disorder characterized by a persistent sensation of a "lump in the throat." Crucially, there is **no actual difficulty in swallowing**; in fact, the sensation often improves during meals. * **Presbyesophagus:** This refers to age-related changes in esophageal motility (reduced secondary peristalsis). While it can cause mild transit issues, it does not typically present with the relentless, worsening progression seen in malignancy. * **Achalasia Cardia:** This is a motility disorder where dysphagia is often **paradoxical** (more difficulty with liquids than solids in early stages) or occurs for both solids and liquids simultaneously from the onset. It is generally episodic or stable over long periods rather than strictly progressive. **3. Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Progressive dysphagia (Solids → Liquids) = Malignancy; Intermittent/Simultaneous dysphagia (Solids + Liquids) = Motility disorder (e.g., Achalasia). * **Most common site:** Worldwide, Squamous Cell Ca is most common (upper/middle third); however, Adenocarcinoma (lower third) is rising due to GERD/Barrett’s. * **Investigation of choice:** Upper GI Endoscopy (UGIE) with biopsy. * **Initial investigation:** Barium swallow (shows "Rat-tail" or "Bird-beak" appearance in Achalasia and "Irregular apple-core" appearance in Carcinoma).

Q: What is the sign of lymphatic spread in carcinoma of the stomach?

Troisier's sign. **Explanation:** In carcinoma of the stomach, lymphatic spread is the most common mode of metastasis. **Troisier’s sign** refers to the clinical finding of a palpable, hard, non-tender left supraclavicular lymph node (known as **Virchow’s node**). This occurs because the stomach's lymphatic drainage eventually reaches the thoracic duct, which joins the venous system at the left subclavian vein. Malignant cells can seed the nodes at this junction via retrograde flow. **Analysis of Options:** * **Troisier's sign (Correct):** Specifically denotes the presence of Virchow’s node, indicating advanced intra-abdominal malignancy (most commonly gastric cancer) spreading via the **lymphatic system**. * **Krukenberg’s tumour:** Represents **transcoelomic (peritoneal) spread** to the ovaries. It is characterized by bilateral ovarian enlargement with "signet-ring" cells. * **Sister Mary Joseph’s nodules:** Represents metastasis to the umbilicus. While it can involve lymphatics, it is primarily classified as **direct or transcoelomic spread** along the falciform ligament. * **Trousseau’s sign:** This is a **paraneoplastic syndrome** (migratory thrombophlebitis) associated with visceral malignancies (especially pancreatic and gastric cancer), but it is a hematological/coagulation phenomenon, not a sign of lymphatic spread. **High-Yield Clinical Pearls for NEET-PG:** * **Irish’s Node:** Metastasis to the left axillary lymph node. * **Blumer’s Shelf:** A palpable mass in the pouch of Douglas on rectal examination (transcoelomic spread). * **Staging:** The most important prognostic factor in gastric cancer is the number of positive regional lymph nodes (N stage). * **Investigation of choice:** Upper GI Endoscopy with biopsy. For staging, Contrast-Enhanced CT (CECT) is preferred.

Q: Following oesophagectomy, what is the best substitute for the oesophagus?

Stomach. **Explanation:** The **stomach** is the preferred and most commonly used conduit for esophageal reconstruction following esophagectomy. Its superiority is based on its **excellent intrinsic blood supply** (primarily via the right gastroepiploic artery), its robust mobility which allows it to reach as high as the neck for cervical anastomosis, and the requirement for only a **single anastomosis** (esophagogastrostomy). **Analysis of Options:** * **Stomach (Correct):** It is technically simpler to mobilize, has a reliable vascular pedicle, and demonstrates better long-term functional outcomes compared to other conduits. * **Colon (Left/Right):** The colon is considered the **second choice**. It is used when the stomach is unavailable (e.g., due to previous gastric surgery, corrosive injury, or tumor involvement). While it provides adequate length and is resistant to acid reflux, it requires three anastomoses, making the surgery more complex and increasing the risk of ischemia. * **Jejunum:** This is typically reserved for **short-segment replacements** or when both the stomach and colon are unavailable. Its use for long-segment reconstruction is limited by its complex mesenteric vascular anatomy, which often necessitates microvascular "supercharging" (free jejunal flap). **Clinical Pearls for NEET-PG:** * **Vascular Supply:** When using the stomach, the **Right Gastroepiploic Artery** is the primary vessel that must be preserved. * **Route of Choice:** The **posterior mediastinum** (the original esophageal bed) is the shortest and most physiological route for the conduit. * **Most Common Complication:** Anastomotic leak is a significant concern, but the stomach has the lowest rate of graft necrosis among the options.

Q: A 75-year-old woman with chronic atrial fibrillation presented to the hospital with a 2-day history of colicky abdominal pain. Physical examination revealed hypoactive bowel sounds and diffuse abdominal tenderness. Laboratory tests showed a white cell count of 19,400 per cubic millimeter with 92% neutrophils, a blood urea nitrogen level of 42 mg/dL, and a serum creatinine level of 3.0 mg/dL. What is the most probable diagnosis in this patient?

Mesenteric ischemia. **Explanation:** The clinical presentation is classic for **Acute Mesenteric Ischemia (AMI)**. The patient has a significant predisposing factor—**chronic atrial fibrillation**—which is the most common cause of mesenteric arterial embolism (usually affecting the Superior Mesenteric Artery). **Why Mesenteric Ischemia is Correct:** The hallmark of AMI is "pain out of proportion to physical findings." In an elderly patient with an embolic source (AFib), sudden onset colicky pain followed by leukocytosis and signs of metabolic stress (elevated BUN/Creatinine suggesting dehydration or prerenal azotemia) strongly points toward intestinal ischemia. As the bowel becomes gangrenous, tenderness becomes more diffuse and bowel sounds decrease. **Why Other Options are Incorrect:** * **Portal vein thrombosis:** Usually presents with features of portal hypertension (ascites, variceal bleeding) or vague abdominal pain, but is less likely to cause acute colicky pain and high leukocytosis in the absence of underlying cirrhosis or prothrombotic states. * **Intestinal perforation:** While a complication of ischemia, primary perforation usually presents with sudden, sharp pain and "board-like" rigidity (peritonitis) rather than a 2-day history of colicky pain. * **Lynch syndrome:** This is a hereditary non-polyposis colorectal cancer (HNPCC) syndrome. It presents with a family history of cancers (colon, endometrial) and is not an acute surgical emergency. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** CT Angiography (CTA) is the investigation of choice. * **Most Common Site:** Superior Mesenteric Artery (SMA) due to its narrow take-off angle from the aorta. * **Laboratory Marker:** Elevated **Serum Lactate** is a sensitive but late marker indicating bowel infarction. * **Classic Triad:** Postprandial pain, weight loss, and abdominal bruit (seen in *chronic* mesenteric ischemia).

Question 1

A 60-year-old woman with a history of duodenal ulcer disease presents with anorexia, nausea, weight loss, and recurrent vomiting of undigested food over the past 6 months. Examination reveals dehydration, hypokalemia, and hypochloremic alkalosis. What is the most likely diagnosis?

Accepted Answer

Pyloric obstruction due to cicatricial stenosis of the duodenum

Answer

Carcinoma of the gastric fundus

Answer

Penetrating ulcer

Answer

Zollinger-Ellison Syndrome

Question 2

All are features of viable bowel, except?

Accepted Answer

Presence of food

Answer

Vascularity

Answer

Musculature

Answer

Shiny peritoneum

Question 3

Ivor Lewis operation is the treatment of choice for cancer involving which part of the esophagus?

Accepted Answer

Lower third

Answer

Middle third

Answer

Upper third

Answer

Entire esophagus

Question 4

Progressive dysphagia is seen in which of the following conditions?

Accepted Answer

Carcinoma esophagus

Answer

Globus hystericus

Answer

Presbyesophagus

Answer

Achalasia

Question 5

What is the sign of lymphatic spread in carcinoma of the stomach?

Accepted Answer

Troisier's sign

Answer

Krukenberg's tumour

Answer

Sister Mary Joseph's nodules

Answer

Trousseau's sign

Question 6

Following oesophagectomy, what is the best substitute for the oesophagus?

Accepted Answer

Stomach

Answer

Jejunum

Answer

Left colon

Answer

Right colon

Question 7

Which of the following statements about volvulus is false?

Accepted Answer

Lower GI endoscopy is contraindicated in sigmoid volvulus

Answer

More common in psychiatric patients

Answer

Sigmoid volvulus is more common than caecal volvulus

Answer

Volvulus of the caecum is managed by conservative methods

Question 8

Total gastrectomy is the only accepted treatment for which of the following conditions?

Accepted Answer

Cancer located in the proximal stomach

Answer

Cancer located in the distal stomach

Answer

Ulcerating lesion in the body of the stomach

Answer

Polyploidy lesion in the antrum of the stomach

Question 9

A 75-year-old woman with chronic atrial fibrillation presented to the hospital with a 2-day history of colicky abdominal pain. Physical examination revealed hypoactive bowel sounds and diffuse abdominal tenderness. Laboratory tests showed a white cell count of 19,400 per cubic millimeter with 92% neutrophils, a blood urea nitrogen level of 42 mg/dL, and a serum creatinine level of 3.0 mg/dL. What is the most probable diagnosis in this patient?

Accepted Answer

Mesenteric ischemia

Answer

Portal vein thrombosis

Answer

Intestinal perforation

Answer

Lynch syndrome

Question 10

A 35-year-old lady presented with retrosternal burning pain, epigastric pain, and regurgitation for 6 years. What is the most preferred treatment option?

Accepted Answer

Laparoscopic Nissen's fundoplication

Answer

Lifestyle modification

Answer

Standard dose PPI

Answer

Dietary modification

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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