Gastrointestinal Bleeding — MCQs
Which of the following is the most likely cause of bright red blood per rectum (hematochezia) in a 70-year-old patient?
Wireless capsule endoscopy is done to visualize which of the following condition?
All of the following are causes of lower gastrointestinal bleeding, EXCEPT:
What is the drug of choice for bleeding oesophageal varices?
"String of beads" appearance on horizontal abdominal view X-ray is suggestive of:
What is the investigation of choice in a patient with blunt abdominal trauma with hematuria?
A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
The following statements regarding Meckel's diverticulum in adults are true except
Which of the following is NOT a contraindication for laparoscopic cholecystectomy?
A 70-year-old woman with chronic osteoarthritis of the hip presents with worsening pain and limited mobility despite conservative management. What is the next appropriate step?
Gastrointestinal Bleeding Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is the most likely cause of bright red blood per rectum (hematochezia) in a 70-year-old patient?
- A. Esophageal varices
- B. Diverticulosis (Correct Answer)
- C. Gastric cancer
- D. Peptic ulcer disease
Explanation: ***Diverticulosis*** - **Diverticular bleeding** is a common cause of **painless bright red blood per rectum (hematochezia)**, particularly in older adults, due to rupture of blood vessels within diverticula [1]. - The diverticula are often found in the **colon**, making the bleeding lower gastrointestinal and thus resulting in bright red blood rather than melena. *Esophageal varices* - Typically present with **hematemesis** (vomiting blood) or **melena** (black, tarry stools) due to upper GI bleeding, not bright red blood per rectum. - They are associated with **portal hypertension**, primarily seen in patients with chronic liver disease. *Gastric cancer* - More commonly causes chronic, **occult GI bleeding** leading to iron deficiency anemia [2], or if severe, **melena** or **hematemesis**. - **Bright red blood per rectum** is generally not a typical presentation unless there is massive bleeding with rapid transit through the GI tract, which is less common. *Peptic ulcer disease* - A common cause of **upper GI bleeding**, usually presenting as **melena** or **hematemesis** [2]. - **Hematochezia** from a peptic ulcer would imply a very rapid bleed with extremely fast bowel transit time, which is atypical and associated with massive blood loss.
Question 2: Wireless capsule endoscopy is done to visualize which of the following condition?
- A. Esophageal varices
- B. Gastric carcinoma
- C. Crohn's disease (Correct Answer)
- D. Ulcerative colitis
Explanation: ***Crohn's disease*** - Wireless capsule endoscopy is primarily used to visualize the **small bowel**, which is the main site of involvement in Crohn's disease [3]. - It helps detect **mucosal inflammation**, ulcers, and strictures that may not be accessible by conventional endoscopy [1]. *Esophageal varices* - **Esophageal varices** are best visualized and treated with conventional **esophagogastroduodenoscopy (EGD)**, which allows for direct intervention [2]. - Capsule endoscopy is not the preferred method due to its inability to adequately distend the esophagus or perform therapeutic maneuvers [4]. *Gastric carcinoma* - Diagnosing **gastric carcinoma** requires visualization of the stomach lining, typically achieved through **conventional upper endoscopy** with biopsies [2]. - The capsule may pass too quickly through the stomach or miss subtle lesions, and it cannot obtain tissue samples. *Ulcerative colitis* - **Ulcerative colitis** primarily affects the **colon**, which is visualized using a **colonoscopy** [3]. - While capsule endoscopy can visualize the small bowel, it is not effective for examining the colon due to insufficient imaging of the entire large intestine and lack of biopsy capabilities.
Question 3: All of the following are causes of lower gastrointestinal bleeding, EXCEPT:
- A. Peptic ulcer disease (Correct Answer)
- B. Angiodysplasia
- C. Colorectal cancer
- D. Diverticulosis
Explanation: ***Peptic ulcer disease*** - **Peptic ulcer disease** is a common cause of **upper gastrointestinal bleeding** because ulcers typically form in the stomach or duodenum [1]. - Bleeding from a peptic ulcer would usually manifest as **hematemesis** (vomiting blood) or **melena** (black, tarry stools) due to the digestion of blood in the upper GI tract, rather than bright red blood per rectum [2]. *Angiodysplasia* - **Angiodysplasia** involves dilated, fragile blood vessels in the GI tract, most commonly in the **right colon**, and is a significant cause of lower GI bleeding [3]. - It often leads to intermittent, painless bleeding, which can range from **occult blood loss** to frank hematochezia. *Colorectal cancer* - **Colorectal cancer** can cause lower GI bleeding due to the **fragile and ulcerated surface** of the tumor [3]. - Bleeding can be chronic and insidious, leading to **iron deficiency anemia**, or acute, presenting as visible blood in the stool [3]. *Diverticulosis* - **Diverticulosis** involves the presence of small, bulging pouches (diverticula) in the colon wall, and bleeding occurs when a **blood vessel** within the diverticulum erodes. - This is a very common cause of **painless, acute, and often massive lower GI bleeding** in older adults.
Question 4: What is the drug of choice for bleeding oesophageal varices?
- A. Ethanolamine oleate
- B. Octreotide (Correct Answer)
- C. Propanolol
- D. Phytonadione
Explanation: ***Octreotide*** - **Octreotide** is an analogue of **somatostatin** that reduces splanchnic blood flow and portal pressure, thereby decreasing bleeding from esophageal varices. - It is often used in the acute management of **bleeding esophageal varices** due to its rapid onset of action and favorable safety profile. *Ethanolamine oleate* - **Ethanolamine oleate** is a **sclerosing agent** used for endoscopic sclerotherapy of esophageal varices, not typically as the initial drug of choice for acute bleeding [1]. - It acts by causing inflammation and fibrosis of the varices, which can be effective but carries risks such as **esophageal ulceration** or perforation. *Propranolol* - **Propranolol** is a **non-selective beta-blocker** used for the prophylactic prevention of variceal bleeding, not for acute management of active bleeding. - It works by reducing portal venous pressure by decreasing cardiac output and splanchnic vasoconstriction. *Phytonadione* - **Phytonadione** (vitamin K1) is used to reverse **coumarin anticoagulant effects** or to treat **vitamin K deficiency**, which can contribute to bleeding but is not a direct treatment for variceal bleeding itself. - It helps in the synthesis of **coagulation factors II, VII, IX, and X**, thereby improving clotting.
Question 5: "String of beads" appearance on horizontal abdominal view X-ray is suggestive of:
- A. Intussusception
- B. Sigmoid volvulus
- C. Small bowel obstruction (Correct Answer)
- D. Large bowel obstruction
Explanation: ***Small bowel obstruction*** - A "string of beads" appearance on a horizontal abdominal view X-ray refers to small gas bubbles trapped between the valvulae conniventes in a dilated small bowel loop. - This finding is highly suggestive of **complete small bowel obstruction**, particularly when accompanied by multiple air-fluid levels and dilated bowel loops. *Intussusception* - While it causes obstruction, intussusception usually appears as a **target sign** (doughnut sign) on ultrasound or a **meniscus sign** on barium enema, not a string of beads on plain X-ray. - Plain X-rays may show signs of **bowel obstruction**, but the string of beads is not characteristic. *Sigmoid volvulus* - Sigmoid volvulus is characterized by a **dilated loop of colon** forming an inverted U-shape, often described as a **coffee bean sign** or **omega sign**, on plain X-ray. - This involves the large bowel, and the "string of beads" specifically relates to gas in the small bowel. *Large bowel obstruction* - Large bowel obstruction typically presents with a **dilated colon** proximal to the obstruction and a collapsed distal colon, often with absent or minimal gas in the rectum and sigmoid. - While air-fluid levels can be present, the "string of beads" is a specific sign of gas within dilated small bowel loops, distinguishing it from most large bowel obstructions.
Question 6: What is the investigation of choice in a patient with blunt abdominal trauma with hematuria?
- A. USG of the abdomen
- B. Retrograde urogram
- C. IVP
- D. CECT (Correct Answer)
Explanation: ***Correct Answer: CECT*** - **Contrast-enhanced computed tomography (CECT)** is the investigation of choice for evaluating blunt abdominal trauma with hematuria as it accurately assesses the extent of injury to the **kidneys, ureters, bladder**, and surrounding structures. - It provides detailed images for detecting **renal lacerations, hematomas, urine extravasation**, and other abdominal organ injuries. - **Gold standard** in trauma protocols for comprehensive evaluation of renal and abdominal injuries. *Incorrect: USG of the abdomen* - **Ultrasound** can identify gross abnormalities like large hematomas or free fluid but is less sensitive than CECT for subtle renal injuries or collecting system disruptions. - It is often used as an initial screening tool (FAST exam) but not the definitive investigation of choice in this context. *Incorrect: Retrograde urogram* - A **retrograde urogram** primarily evaluates the **lower urinary tract** (ureters and bladder) by injecting contrast directly into the urethra. - It is not suitable for assessing the extent of renal parenchymal injury or other abdominal organ damage in blunt trauma. *Incorrect: IVP* - **Intravenous pyelogram (IVP)** uses intravenous contrast to visualize the kidneys, ureters, and bladder, but it has largely been replaced by CECT due to its lower sensitivity and specificity for traumatic injuries. - It provides less detailed anatomical information about surrounding soft tissues and can miss subtle parenchymal or vascular injuries.
Question 7: A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
- A. Colonoscopy
- B. Abdominal ultrasound
- C. Upper endoscopy (Correct Answer)
- D. CT scan of the abdomen
Explanation: ***Upper endoscopy*** - **Hematemesis** (vomiting blood) and **melena** (black, tarry stools) are classic signs of an **upper gastrointestinal bleed** [1]. - **Upper endoscopy** allows direct visualization of the esophagus, stomach, and duodenum to identify the bleeding source (e.g., ulcers, varices) and potentially provide therapeutic intervention [2]. *Colonoscopy* - This procedure is used to visualize the **lower gastrointestinal tract** (colon and rectum). - While melena can sometimes originate from the small bowel or right colon, hematemesis strongly points to an upper GI source, making colonoscopy an inappropriate initial diagnostic choice. *Abdominal ultrasound* - An **abdominal ultrasound** is excellent for evaluating solid organs (e.g., liver, gallbladder, kidneys) and detecting fluid collections. - It does not directly visualize the GI mucosa or lumen to identify the source of active bleeding. *CT scan of the abdomen* - A **CT scan of the abdomen** can identify gross pathologies and sometimes show active bleeding, but it is less sensitive for mucosal lesions and does not allow for direct therapeutic intervention. - It is generally reserved for cases where endoscopy is inconclusive or contraindicated, or when there is suspicion of a mass or perforation.
Question 8: The following statements regarding Meckel's diverticulum in adults are true except
- A. It usually presents on the mesenteric border of small intestine (Correct Answer)
- B. Bleeding is a common complication
- C. Incidental removal is often recommended in younger patients with risk factors
- D. It is a remnant of omphalomesenteric duct
Explanation: ***It usually presents on the mesenteric border of small intestine*** - Meckel's diverticulum is a **true diverticulum** arising from the **anti-mesenteric border** of the ileum, typically 2 feet from the ileocecal valve. - Its mesenteric positioning would be highly atypical and contradict its embryological origin as a remnant of the **vitelline duct**. - This statement is **FALSE** - it arises from the anti-mesenteric border, making it the correct answer to this "except" question. *Bleeding is a common complication* - **Bleeding** is indeed a common complication in adults, often due to **ectopic gastric mucosa** (present in ~50% of cases) within the diverticulum causing ulceration. - This complication can manifest as **painless rectal bleeding**. - This statement is **TRUE**. *Incidental removal is often recommended in younger patients with risk factors* - Current evidence-based guidelines recommend **selective removal** based on risk factors including age <50 years, palpable abnormalities (thickening, nodularity), narrow neck, length >2cm, or presence of bands. - In younger patients with risk factors, the lifetime risk of complications justifies prophylactic removal. - In older adults or those without risk factors, the morbidity of resection may outweigh the lifetime risk of complications. - This statement is **TRUE**. *It is a remnant of omphalomesenteric duct* - Meckel's diverticulum is the most common congenital anomaly of the gastrointestinal tract, representing a persistent portion of the **embryonic vitelline (omphalomesenteric) duct**. - This duct normally connects the fetal midgut to the yolk sac and should completely regress by the 7th week of gestation. - This statement is **TRUE**.
Question 9: Which of the following is NOT a contraindication for laparoscopic cholecystectomy?
- A. Patients with severe liver cirrhosis and portal hypertension
- B. Patients with obesity (Correct Answer)
- C. Patients with a history of previous abdominal surgery
- D. Patients with severe chronic obstructive pulmonary disease (COPD)
Explanation: ***Patients with obesity*** - **Obesity** is not a contraindication for laparoscopic cholecystectomy and is actually often considered a **relative indication** for the laparoscopic approach over open surgery. - Laparoscopic cholecystectomy in obese patients offers significant advantages including reduced wound complications, decreased infection rates, better cosmesis, and faster recovery. - While technically more challenging due to thicker abdominal wall and increased intra-abdominal fat, experienced surgical teams routinely perform laparoscopic cholecystectomy in obese patients safely. *Patients with severe liver cirrhosis and portal hypertension* - **Severe liver cirrhosis and portal hypertension** are considered absolute or strong contraindications due to significantly increased risk of bleeding from dilated collateral vessels and impaired coagulation. - Pneumoperitoneum can further compromise hepatic blood flow and worsen portal hypertension. - These patients often require open surgery with careful hemostasis or medical management due to prohibitively high operative risk. *Patients with severe chronic obstructive pulmonary disease (COPD)* - Patients with **severe COPD** with poor pulmonary reserve may have difficulty tolerating pneumoperitoneum due to increased intrathoracic pressure, reduced diaphragmatic excursion, and decreased ventilation-perfusion matching. - Hypercarbia from CO₂ absorption and increased airway pressures can lead to significant respiratory compromise in patients with limited pulmonary reserve. - While mild-moderate COPD is not a contraindication with appropriate anesthetic management, severe COPD with inability to tolerate pneumoperitoneum constitutes a contraindication. *Patients with a history of previous abdominal surgery* - A history of **previous abdominal surgery** is considered at most a **relative contraindication**, not an absolute one, and is routinely managed in modern laparoscopic practice. - While intra-abdominal adhesions may increase technical difficulty and risk of bowel injury, techniques like open Hassan port insertion and careful adhesiolysis allow safe laparoscopic surgery in most cases. - Previous surgery requires careful preoperative assessment and may necessitate modified port placement or conversion to open if dense adhesions are encountered, but does not preclude attempting laparoscopy.
Question 10: A 70-year-old woman with chronic osteoarthritis of the hip presents with worsening pain and limited mobility despite conservative management. What is the next appropriate step?
- A. NSAIDs
- B. Physical therapy
- C. Intra-articular corticosteroid injections
- D. Total hip replacement (Correct Answer)
Explanation: ***Total hip replacement*** - For **severe osteoarthritis (OA)** causing significant pain and **functional impairment** despite failed conservative management, **total hip replacement** is the most definitive and effective treatment. - This procedure alleviates pain and restores **mobility**, dramatically improving the patient's quality of life. *NSAIDs* - **NSAIDs** are typically part of **initial conservative management** for symptomatic relief in mild to moderate OA, but they have already failed in this patient. - Continued use in elderly patients carries risks of **gastrointestinal, renal, and cardiovascular side effects**, making it a less desirable long-term solution. *Physical therapy* - **Physical therapy** is a crucial component of conservative management to improve **strength, flexibility, and function**, but it often becomes insufficient in advanced OA. - Since this patient has worsening symptoms despite conservative measures, physical therapy alone is unlikely to provide adequate relief. *Intra-articular corticosteroid injections* - **Corticosteroid injections** can provide temporary pain relief by reducing inflammation but do not address the underlying **structural damage** of severe OA. - Their effectiveness diminishes over time, and repeated injections are discouraged due to potential cartilage damage.
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