Gastrointestinal Motility Disorders Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Gastrointestinal Motility Disorders. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Gastrointestinal Motility Disorders Indian Medical PG Question 1: What is the differentiating feature between irritable bowel syndrome and inflammatory bowel disease?
- A. Stool calprotectin (Correct Answer)
- B. pain in abdomen
- C. Diarrhoea
- D. Mucus in stools
Gastrointestinal Motility Disorders Explanation: ***Stool calprotectin***
- **Stool calprotectin** is a reliable biomarker used to differentiate between **Inflammatory Bowel Disease (IBD)** and **Irritable Bowel Syndrome (IBS)**. It's a protein released by neutrophils during intestinal inflammation.
- Elevated levels of **calprotectin** strongly suggest **mucosal inflammation** characteristic of IBD (Crohn's disease or ulcerative colitis), while normal levels are typical in IBS, which lacks inflammation [1].
*pain in abdomen*
- **Abdominal pain** is a common symptom in both IBS and IBD. In IBS, it's often linked to altered bowel habits and is a key diagnostic criterion [1].
- In IBD, abdominal pain is typically due to inflammation, strictures, or abscesses, but its presence alone does not differentiate the conditions .
*Diarrhoea*
- **Diarrhea** is a prominent symptom in both IBS and IBD. In IBS, it can be a predominant feature (IBS-D), often associated with urgency [1].
- In IBD, diarrhea is usually due to inflammation disrupting normal absorption and secretion, and it may contain blood or mucus .
*Mucus in stools*
- The presence of **mucus in stools** can occur in both IBS and IBD. In IBS, it's often present without blood and is generally considered part of altered bowel function [1].
- In IBD, mucus in stools, particularly when accompanied by blood, strongly suggests active intestinal inflammation and mucosal damage .
Gastrointestinal Motility Disorders Indian Medical PG Question 2: Corkscrew esophagus is seen in which of the following conditions ?
- A. Scleroderma
- B. Achalasia cardia
- C. Diffuse esophagus spasm (Correct Answer)
- D. Carcinoma esophagus
Gastrointestinal Motility Disorders Explanation: ***Diffuse esophagus spasm***
- **Corkscrew esophagus** is a classic radiographic finding in **diffuse esophageal spasm (DES)**, indicating multiple simultaneous, non-peristaltic contractions. [1]
- This condition is characterized by **uncoordinated esophageal contractions** that can lead to chest pain and dysphagia. [1]
*Scleroderma*
- Scleroderma typically causes **hypomotility** or aperistalsis in the esophagus, especially in the distal two-thirds, rather than a corkscrew appearance. [1]
- It results from progressive **fibrosis and atrophy of the smooth muscle**, leading to esophageal dilation and reflux symptoms. [1]
*Achalasia cardia*
- Achalasia is defined by the **failure of the lower esophageal sphincter (LES) to relax** and loss of peristalsis in the esophageal body, leading to a "bird-beak" appearance on barium swallow. [2]
- It features a **dilated esophagus** proximally to the tight LES, not multiple indentations. [2]
*Carcinoma esophagus*
- Esophageal carcinoma usually presents as a **focal stricture**, mass, or irregular lumen on imaging, often causing dysphagia that is progressive.
- It does not typically cause the diffuse, segmental contractions characteristic of a corkscrew esophagus.
Gastrointestinal Motility Disorders Indian Medical PG Question 3: Gold standard investigation for diagnosing GERD:
- A. 24 hour pH monitoring (Correct Answer)
- B. USG
- C. HIDA
- D. Manometry
Gastrointestinal Motility Disorders Explanation: ***24 hour pH monitoring***
- This is considered the **gold standard** for diagnosing GERD because it directly measures the frequency and duration of **acid reflux events** into the esophagus.
- It helps correlate symptoms with reflux episodes, providing objective evidence for the diagnosis and guiding treatment.
*USG*
- **Ultrasound (USG)** is primarily used for imaging abdominal organs like the **gallbladder**, liver, and kidneys, not for directly assessing esophageal acid reflux.
- While it can sometimes detect complications, it cannot diagnose the presence or severity of GERD itself.
*HIDA*
- **HIDA scan** (hepatobiliary iminodiacetic acid scan) is used to diagnose problems of the **gallbladder** and bile ducts, such as cholecystitis or biliary obstruction.
- It is not relevant for the diagnosis of gastroesophageal reflux disease.
*Manometry*
- **Esophageal manometry** measures the **pressure and coordination of esophageal muscle contractions**, assessing motility disorders [1].
- While it can identify related conditions like achalasia or ineffective peristalsis, it does not directly measure acid reflux and therefore is not the gold standard for GERD diagnosis.
Gastrointestinal Motility Disorders Indian Medical PG Question 4: Achalasia cardia presents with all of the following except:
- A. Increased lower esophagus sphincter tone
- B. Normal peristalsis (Correct Answer)
- C. Absence of peristalsis
- D. Dysphagia
Gastrointestinal Motility Disorders Explanation: ***Normal peristalsis***
- Achalasia is characterized by the **absence of esophageal peristalsis**, specifically in the distal two-thirds of the esophagus [1].
- The presence of normal peristalsis would argue against a diagnosis of achalasia, as it is a core defining feature of the condition.
*Increased lower esophagus sphincter tone*
- Achalasia is defined by **incomplete relaxation of the lower esophageal sphincter (LES)** and often an **elevated resting LES pressure** [1].
- This increased tone contributes significantly to the difficulty in swallowing experienced by patients.
*Absence of peristalsis*
- A definitive diagnostic feature of achalasia is the **loss of primary and secondary peristalsis** in the esophageal body [1].
- This motor dysfunction prevents effective propulsion of food into the stomach.
*Dysphagia*
- **Dysphagia for both solids and liquids** is the most common presenting symptom of achalasia, progressing over months to years [1].
- It results from the impaired esophageal motility and the incomplete relaxation of the LES [1].
Gastrointestinal Motility Disorders Indian Medical PG Question 5: A 60-year-old man presents with foul breath and regurgitates food eaten 3 days ago. What is the most likely diagnosis?
- A. Achalasia cardia
- B. Carcinoma esophagus
- C. Loss of tone of upper esophageal sphincter
- D. Zenker's Diverticulum (Correct Answer)
Gastrointestinal Motility Disorders Explanation: ***Zenker's Diverticulum***
- This condition presents with a classic triad of **dysphagia**, **regurgitation of undigested food**, and **foul breath (halitosis)** due to food retention in the diverticulum.
- The regurgitation of food eaten several days ago is highly characteristic, indicating significant pooling and decomposition within the **pharyngeal pouch**.
*Achalasia cardia*
- Characterized by **dysphagia for both solids and liquids** and regurgitation, but the regurgitated food is typically fresh or only recently ingested, not from several days prior.
- The primary pathology is the **failure of the lower esophageal sphincter (LES) to relax** and loss of peristalsis in the esophageal body.
*Carcinoma esophagus*
- Often presents with **progressive dysphagia** (first for solids, then for liquids) and significant **weight loss**.
- While regurgitation can occur, it's usually of recently ingested food and rarely associated with the severe halitosis from long-standing food decomposition seen in Zenker's.
*Loss of tone of upper esophageal sphincter*
- This condition would more likely lead to **regurgitation of stomach contents** into the pharynx, rather than the retention of food in a pouch.
- It could contribute to **reflux symptoms** but does not explain the formation of a diverticulum or the prolonged food retention leading to foul breath.
Gastrointestinal Motility Disorders Indian Medical PG Question 6: Esophageal manometry is useful in diagnosing all of the following conditions EXCEPT:
- A. Achalasia (a motility disorder)
- B. Diffuse esophageal spasm (a motility disorder)
- C. Malignancy (not typically diagnosed with this test) (Correct Answer)
- D. Assessment of esophageal motility prior to surgery for GERD
Gastrointestinal Motility Disorders Explanation: ***Malignancy (not typically diagnosed with this test)***
- **Esophageal manometry** evaluates the **motor function** of the esophagus, measuring pressure changes during swallowing.
- **Malignancy**, such as esophageal cancer, is primarily diagnosed with **endoscopy with biopsy** and imaging studies, not by assessing motility.
*Achalasia (a motility disorder)*
- **Esophageal manometry** is the **gold standard** for diagnosing achalasia, characterized by **absent peristalsis** in the esophageal body and **incomplete relaxation of the lower esophageal sphincter (LES)** [1].
- High-resolution manometry shows elevated **integrated relaxation pressure (IRP)** and often pan-esophageal pressurization.
*Diffuse esophageal spasm (a motility disorder)*
- This condition is also diagnosed by **esophageal manometry**, which reveals simultaneous, **non-peristaltic contractions** of high amplitude, often interspersed with normal peristalsis [1].
- It may also show **premature contractions** and **multiple rapid swallows** triggering spasm.
*Assessment of esophageal motility prior to surgery for GERD*
- **Manometry** is routinely performed before **anti-reflux surgery (e.g., Nissen fundoplication)** to rule out underlying esophageal motility disorders that could complicate surgery or worsen symptoms post-operatively [1].
- Identifying conditions like **achalasia** or **scleroderma** would contraindicate a standard fundoplication, as dysphagia could worsen [1].
Gastrointestinal Motility Disorders Indian Medical PG Question 7: Which of the following drugs can cause hypertrophic pyloric stenosis?
- A. Nifedipine
- B. Vancomycin
- C. Phenyl propanolamine
- D. Erythromycin (Correct Answer)
Gastrointestinal Motility Disorders Explanation: ***Erythromycin***
- **Erythromycin** use in infants, particularly during the first few weeks of life, has been associated with an increased risk of developing **hypertrophic pyloric stenosis**.
- The mechanism is believed to involve the drug's properties as a **motilin receptor agonist**, which may affect the development or function of the pyloric sphincter.
*Nifedipine*
- **Nifedipine** is a calcium channel blocker primarily used for cardiovascular conditions like hypertension and angina.
- It works by relaxing smooth muscles and is not linked to the development of **pyloric stenosis**.
*Vancomycin*
- **Vancomycin** is an antibiotic used for severe bacterial infections, particularly against Gram-positive bacteria.
- It is not associated with the development of **hypertrophic pyloric stenosis**.
*Phenylpropanolamine*
- **Phenylpropanolamine** is a sympathomimetic drug previously used as a decongestant and anorectic.
- It primarily affects alpha-adrenergic receptors and has no established link to **pyloric stenosis**.
Gastrointestinal Motility Disorders Indian Medical PG Question 8: Which of the following statements about nutcracker esophagus is correct?
- A. There are no effective medical treatments available.
- B. It is a type of esophageal cancer.
- C. It is a benign condition with no symptoms.
- D. It is characterized by excessively strong peristaltic contractions causing chest pain and dysphagia. (Correct Answer)
Gastrointestinal Motility Disorders Explanation: ***It is characterized by excessively strong peristaltic contractions causing chest pain and dysphagia.***
- Nutcracker esophagus is a **motility disorder** defined by **high-amplitude, prolonged peristaltic contractions** in the distal esophagus [1].
- These powerful contractions can lead to **severe chest pain**, which may mimic angina, and **dysphagia** (difficulty swallowing) [1].
*There are no effective medical treatments available.*
- This statement is incorrect as several medical treatments, including **calcium channel blockers**, **nitrates**, and **tricyclic antidepressants**, can help manage symptoms by reducing esophageal spasm [1].
- **Botulinum toxin injection** into the esophageal muscles and **surgical myotomy** are also options for refractory cases.
*It is a type of esophageal cancer.*
- Nutcracker esophagus is a **functional motility disorder** and **not a malignant condition**; it does not involve cancerous growth.
- While it can cause symptoms similar to cancer (e.g., dysphagia), it is fundamentally different in its pathology.
*It is a benign condition with no symptoms.*
- While nutcracker esophagus is generally considered **benign** (not life-threatening), it is **often symptomatic**, causing significant **chest pain** and **dysphagia**, which can severely impact a patient's quality of life [1].
- The symptoms can be bothersome and require treatment, contradicting the idea of no symptoms.
Gastrointestinal Motility Disorders Indian Medical PG Question 9: A patient with diabetic gastroparesis is treated with erythromycin primarily due to its ability to:
- A. Increase gastric motility
- B. Decrease gastric motility
- C. Bind to motilin receptors (Correct Answer)
- D. Act as a motilin analogue
Gastrointestinal Motility Disorders Explanation: ***Bind to motilin receptors***
- Erythromycin acts as a **motilin receptor agonist**, mimicking the action of the endogenous hormone motilin, which stimulates gastrointestinal motility.
- This binding leads to increased **gastric contractions** and improved gastric emptying, addressing the primary problem in gastroparesis.
*Increase gastric motility*
- While erythromycin *does* increase gastric motility, this option describes the **effect** rather than the primary mechanism of action (binding to motilin receptors).
- Understanding the receptor binding is crucial for grasping why erythromycin is effective in this context.
*Decrease gastric motility*
- Decreasing gastric motility would **worsen** diabetic gastroparesis, a condition already characterized by delayed gastric emptying.
- Erythromycin's therapeutic effect is the exact opposite of decreasing motility.
*Act as a motilin analogue*
- Erythromycin is not a direct motilin analogue in terms of its chemical structure, but it **mimics motilin's effects** by binding to its receptors.
- The precise mechanism is its binding to the receptors, rather than being classified as a structural analogue.
Gastrointestinal Motility Disorders Indian Medical PG Question 10: Which extra-intestinal symptom of inflammatory bowel disease worsens with exacerbation of disease activity?
- A. Primary sclerosing cholangitis
- B. Uveitis
- C. Arthritis (Correct Answer)
- D. Erythema nodosum
Gastrointestinal Motility Disorders Explanation: ***Arthritis***
- **Peripheral arthritis** associated with inflammatory bowel disease (IBD) often **worsens with intestinal disease exacerbations** and improves with resolution of flares [1].
- This type of arthritis typically affects larger joints and is **non-deforming and asymmetric**.
*Erythema nodosum*
- **Erythema nodosum**, a skin manifestation, is generally **correlated with IBD activity** and usually improves as the bowel disease is treated [1].
- It presents as **tender, red nodules** on the shins and is not consistently one of the symptoms that *worsens* with exacerbation, but rather is *present* during active disease.
*Primary sclerosing cholangitis*
- **Primary sclerosing cholangitis (PSC)** is a chronic liver condition that is **associated with IBD**, particularly ulcerative colitis.
- However, the progression of PSC is largely **independent of the intestinal disease activity** and does not necessarily worsen during IBD exacerbations.
*Uveitis*
- **Uveitis**, an inflammation of the eye's middle layer, is an extra-intestinal manifestation of IBD that can occur **independently of intestinal disease activity**.
- It does not consistently worsen during IBD exacerbations and may require separate focused treatment.
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