Ileus and bowel dysfunction US Medical PG Practice Questions and MCQs
Practice US Medical PG questions for Ileus and bowel dysfunction. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Ileus and bowel dysfunction US Medical PG Question 1: A 75-year-old male is hospitalized for bloody diarrhea and abdominal pain after meals. Endoscopic work-up and CT scan lead the attending physician to diagnose ischemic colitis at the splenic flexure. Which of the following would most likely predispose this patient to ischemic colitis:
- A. Juxtaglomerular cell tumor
- B. Hyperreninemic hyperaldosteronism secondary to type II diabetes mellitus
- C. Obstruction of the abdominal aorta following surgery (Correct Answer)
- D. Essential hypertension
- E. Increased splanchnic blood flow following a large meal
Ileus and bowel dysfunction Explanation: ***Obstruction of the abdominal aorta following surgery***
- A surgical procedure, especially one involving manipulation or clamping of the abdominal aorta, can lead to **reduced blood flow** to the intestinal arteries, making the **splenic flexure** particularly vulnerable to **ischemic colitis** due to its watershed area blood supply between the SMA and IMA territories.
- Reduced arterial flow to the colon results in **ischemia**, which causes inflammation, damage, and can present with bloody diarrhea and abdominal pain.
- Aortic surgery is a recognized risk factor for acute ischemic colitis due to interruption of mesenteric blood flow.
*Juxtaglomerular cell tumor*
- This tumor causes **renin-dependent hypertension**, leading to increased blood pressure, but does not directly cause **colonic ischemia**.
- Its primary effect is on the **renal blood vessels** and **fluid-electrolyte balance**, not intestinal circulation.
*Hyperreninemic hyperaldosteronism secondary to type II diabetes mellitus*
- This condition involves **high renin** and **aldosterone levels**, predisposing to hypertension and electrolyte imbalances, and is often a complication of **diabetes**, but it does not directly cause **ischemia of the colon**.
- While diabetes can cause microvascular complications, this specific presentation of **hyperaldosteronism** is not a direct cause of **ischemic colitis**.
*Essential hypertension*
- While **chronic hypertension** is a risk factor for generalized **atherosclerosis**, it is not as direct and acute a cause of **ischemic colitis** as a specific arterial obstruction.
- The effects of **essential hypertension** on the colon are often less acute and more diffuse than the localized ischemia experienced in this case.
*Increased splanchnic blood flow following a large meal*
- Postprandial **increased splanchnic blood flow** is a normal physiological response that facilitates digestion and nutrient absorption, and would not itself cause **ischemic colitis**.
- The postprandial pain in ischemic colitis occurs because the **diseased vasculature cannot meet increased metabolic demands** during digestion (supply-demand mismatch), not because the increased flow itself is harmful.
- In fact, reduced splanchnic blood flow due to underlying vascular disease, coupled with increased demand after meals, is the actual mechanism for **ischemic colitis** symptoms.
Ileus and bowel dysfunction US Medical PG Question 2: A 38-year-old man arrives at the emergency department with severe periumbilical, colicky pain and abdominal distention for the past 2 days. He is nauseated and reports vomiting light-green emesis 8 times since yesterday morning. He has not had a bowel movement or passed any gas for the past 3 days. He has a past medical history of ventral hernia repair 5 years ago. His heart rate is 110/min, respiratory rate is 24/min, temperature is 38.0°C (100.4°F), and blood pressure is 120/90 mm Hg. The abdomen is distended and mildly tender to deep palpation. Bowel sounds are high-pitched and tinkling. Which of the following is the most likely cause?
- A. Viral gastroenteritis
- B. Cholecystitis
- C. Small bowel obstruction (Correct Answer)
- D. Diverticulitis
- E. Crohn's disease
Ileus and bowel dysfunction Explanation: ***Small bowel obstruction***
- The patient's presentation with **colicky periumbilical pain**, **abdominal distention**, **vomiting of light-green emesis**, and **absence of bowel movements or gas passage** strongly suggests a small bowel obstruction.
- The history of **ventral hernia repair 5 years ago** raises suspicion for **adhesions** as a common cause of small bowel obstruction.
*Viral gastroenteritis*
- This condition typically presents with **diarrhea** and vomiting, but usually **without significant abdominal distention** or absent flatus, which are prominent in this case.
- Unlike small bowel obstruction, gastroenteritis does not cause **tinkling bowel sounds** or significant obstruction to the passage of stool and gas.
*Cholecystitis*
- Cholecystitis usually presents with **right upper quadrant pain**, often radiating to the back or shoulder, and can be associated with **fever and nausea/vomiting**.
- However, it does not typically cause **diffuse abdominal distention**, absent bowel movements/flatus, or **high-pitched, tinkling bowel sounds**.
*Diverticulitis*
- Diverticulitis frequently presents with **left lower quadrant pain**, fever, and changes in bowel habits, though constipation can occur.
- It is less likely to cause the **severe, colicky periumbilical pain**, marked abdominal distention, and signs of complete obstruction seen here.
*Crohn's disease*
- Crohn's disease can cause abdominal pain, diarrhea, and weight loss, and in severe cases, can lead to **strictures and obstruction**.
- However, an acute presentation with **severe, colicky periumbilical pain**, vomiting of light-green emesis, and complete obstruction without a prior diagnosis or known flares makes a primary small bowel obstruction due to adhesions more likely in this context.
Ileus and bowel dysfunction US Medical PG Question 3: A 32-year-old man comes to the emergency department because of recurrent episodes of vomiting for 1 day. He has had over 15 episodes of bilious vomiting. During this period he has had cramping abdominal pain but has not had a bowel movement or passed flatus. He does not have fever or diarrhea. He was diagnosed with Crohn disease at the age of 28 years which has been well controlled with oral mesalamine. He underwent a partial small bowel resection for midgut volvulus at birth. His other medications include vitamin B12, folic acid, loperamide, ferrous sulfate, and vitamin D3. He appears uncomfortable and his lips are parched. His temperature is 37.1°C (99.3°F), pulse is 103/min, and blood pressure is 104/70 mm Hg. The abdomen is distended, tympanitic, and tender to palpation over the periumbilical area and the right lower quadrant. Rectal examination is unremarkable. A CT scan of the abdomen shows multiple dilated loops of small bowel with a transition zone in the mid to distal ileum. After 24 hours of conservative management with IV fluid resuscitation, nasogastric bowel decompression, promethazine, and analgesia, his condition does not improve and a laparotomy is scheduled. During the laparotomy, two discrete strictures are noted in the mid-ileum, around 20 cm apart. Which of the following is the most appropriate next step in management?
- A. Small bowel resection with ileostomy
- B. Abdominal closure and start palliative care
- C. Small bowel resection and primary anastomosis
- D. Strictureplasty of individual strictures (Correct Answer)
- E. Ileocolectomy
Ileus and bowel dysfunction Explanation: ***Strictureplasty of individual strictures***
- This patient presents with **multiple strictures** in the mid-ileum causing a small bowel obstruction in the setting of **Crohn's disease**. Strictureplasty is the preferred surgical approach for *short, multiple (up to four), or recurrent Crohn's disease strictures* as it preserves bowel length.
- While small bowel resection is an option, **strictureplasty** is favored in Crohn's disease to *avoid short bowel syndrome*, especially if multiple strictures are present, as seen here.
*Small bowel resection with ileostomy*
- An ileostomy is typically created when a primary anastomosis is not safe due to high risk of leak (e.g., severe inflammation, peritonitis, patient instability) or when there is extensive disease not amenable to strictureplasty with primary anastomosis.
- Performing an ileostomy when primary anastomosis is possible unnecessarily creates a stoma, which can lead to complications and impact quality of life.
*Abdominal closure and start palliative care*
- This patient, while acutely unwell, has a surgically correctable cause for his obstruction and is not described as having an incurable or end-stage condition necessitating only palliative care.
- Palliative care would be considered for patients with widespread untreatable disease or severe comorbidities, which is not indicated here given the localized, treatable strictures.
*Small bowel resection and primary anastomosis*
- While small bowel resection is a valid treatment for isolated, non-recurrent strictures, strictureplasty is generally preferred in Crohn's disease when multiple strictures are present.
- **Resection of multiple segments** can lead to significant **short bowel syndrome**, especially in a patient with a history of prior small bowel resection, making strictureplasty a more bowel-sparing and appropriate choice.
*Ileocolectomy*
- **Ileocolectomy** involves resection of the terminal ileum and a portion of the colon. This would be indicated if the disease involves the *ileocecal valve region* or the *colon*, which is not the case in this patient, whose strictures are in the mid-ileum.
- This procedure is excessive for mid-ileal strictures and would result in unnecessary removal of healthy bowel given the location of the strictures.
Ileus and bowel dysfunction US Medical PG Question 4: Four days after undergoing a total abdominal hysterectomy for atypical endometrial hyperplasia, a 59 year-old woman reports abdominal bloating and discomfort. She has also had nausea without vomiting. She has no appetite despite not having eaten since the surgery and drinking only sips of water. Her postoperative pain has been well controlled on a hydromorphone patient-controlled analgesia (PCA) pump. Her foley was removed on the second postoperative day and she is now voiding freely. Although she lays supine in bed for most of the day, she is able to walk around the hospital room with a physical therapist. Her temperature is 36.5°C (97.7°F), pulse is 84/min, respirations are 10/min, and blood pressure is 132/92 mm Hg. She is 175 cm (5 ft 9 in) tall and weighs 115 kg (253 lb); BMI is 37.55 kg/m2. Examination shows a mildly distended, tympanic abdomen; bowel sounds are absent. Laboratory studies are within normal limits. An x-ray of the abdomen shows uniform distribution of gas in the small bowel, colon, and rectum without air-fluid levels. Which of the following is the most appropriate next step in the management of this patient?
- A. Esophagogastroduodenoscopy
- B. Begin total parenteral nutrition
- C. Colonoscopy
- D. Gastrografin enema
- E. Reduce use of opioid therapy (Correct Answer)
Ileus and bowel dysfunction Explanation: ***Reduce use of opioid therapy***
- The patient's symptoms (bloating, discomfort, nausea, absent bowel sounds, diffuse gas on X-ray) after abdominal surgery are consistent with a **postoperative ileus**, which is often exacerbated by **opioid use**.
- Reducing opioids, if pain control allows, can help normalize gastrointestinal motility and resolve the ileus, as her vital signs are stable and there are no signs of obstruction or infection.
*Esophagogastroduodenoscopy*
- This procedure is primarily used to evaluate the **upper gastrointestinal tract** (esophagus, stomach, duodenum) for conditions like ulcers, inflammation, or obstruction.
- While the patient has nausea, there is no evidence suggesting an upper GI pathology that would warrant an EGD, especially with diffuse gas distribution on X-ray.
*Begin total parenteral nutrition*
- **Total parenteral nutrition (TPN)** is indicated when a patient cannot meet their nutritional needs via the enteral route for an extended period, typically more than 7-10 days, or in severe malnutrition.
- The patient has only been NPO for four days post-op, and addressing the underlying cause of her GI symptoms (likely ileus) is the priority before considering long-term nutritional support.
*Colonoscopy*
- **Colonoscopy** is used to visualize the large intestine for conditions such as polyps, cancer, or inflammatory bowel disease.
- There are no symptoms or signs (e.g., lower GI bleeding, chronic diarrhea) to suggest a need for colonoscopy in this acute postoperative setting.
*Gastrografin enema*
- A **Gastrografin enema** is a diagnostic and sometimes therapeutic study used to evaluate the colon and identify conditions like anastomotic leaks or obstructions, particularly in the context of recent surgery.
- The abdominal X-ray shows diffuse gas without air-fluid levels and the patient's symptoms are classic for an ileus, not a mechanical obstruction that would require a contrast study.
Ileus and bowel dysfunction US Medical PG Question 5: A 59-year-old healthy woman presents to her primary care physician’s office six weeks after undergoing an elective breast augmentation procedure in the Dominican Republic. She was told by her surgeon to establish post-operative care once back in the United States. Today she is bothered by nausea and early satiety. Her past medical history is significant only for GERD for which she takes ranitidine. Since the surgery, she has also taken an unknown opioid pain medication that was given to her by the surgeon. She reports that she has been taking approximately ten pills a day. On examination she is afebrile with normal vital signs and her surgical incisions are healing well. Her abdomen is distended and tympanitic. The patient refuses to stop her pain medicine and laxatives are not effective; what medication could be prescribed to ameliorate her gastrointestinal symptoms?
- A. Naloxegol (Correct Answer)
- B. Senna
- C. Pantoprazole
- D. Metoclopramide
- E. Naproxen
Ileus and bowel dysfunction Explanation: ***Naloxegol***
- This patient is experiencing **opioid-induced constipation (OIC)** due to chronic opioid use, evidenced by nausea, early satiety, abdominal distension, and ineffective laxatives. **Naloxegol** is a peripherally acting mu-opioid receptor antagonist (PAMORA) that blocks opioid effects in the gastrointestinal tract without reversing central analgesia.
- It helps ameliorate OIC symptoms by reducing the constipating effects of opioids while the patient continues to take their pain medication, which is crucial given her refusal to stop.
*Senna*
- **Senna** is a stimulant laxative that works by irritating the bowel mucosa to promote peristalsis.
- While useful for some forms of constipation, it is often ineffective in severe OIC because the primary problem is opioid-mediated reduction in gut motility, not simply a lack of stimulation, and the patient reports laxatives have already been ineffective.
*Pantoprazole*
- **Pantoprazole** is a proton pump inhibitor (PPI) used to reduce stomach acid production and treat conditions like GERD.
- While the patient has a history of GERD, her current symptoms of nausea, early satiety, and abdominal distension are primarily related to opioid use and not acid reflux, making pantoprazole an inappropriate treatment for her current GI complaints.
*Metoclopramide*
- **Metoclopramide** is a dopamine antagonist that acts as a prokinetic agent, increasing gastrointestinal motility.
- Although it can help with nausea and gastric emptying, it primarily addresses the upper GI tract and may not be sufficient for the severe, generalized reduction in motility seen in OIC, and its central dopamine blocking effects can lead to side effects like tardive dyskinesia with chronic use.
*Naproxen*
- **Naproxen** is a nonsteroidal anti-inflammatory drug (NSAID) used for pain and inflammation.
- It has no role in treating gastrointestinal motility disorders or opioid-induced constipation; in fact, chronic NSAID use can cause GI side effects like gastritis and ulcers.
Ileus and bowel dysfunction US Medical PG Question 6: A 56-year-old woman is one week status post abdominal hysterectomy when she develops a fever of 101.4°F (38.6°C). Her past medical history is significant for type II diabetes mellitus and a prior history of alcohol abuse. The operative report and intraoperative cystoscopy indicate that the surgery was uncomplicated. The nurse reports that since the surgery, the patient has also complained of worsening lower abdominal pain. She has given the patient the appropriate pain medications with little improvement. The patient has tolerated an oral diet well and denies nausea, vomiting, or abdominal distension. Her blood pressure is 110/62 mmHg, pulse is 122/min, and respirations are 14/min. Since being given 1000 mL of intravenous fluids yesterday, the patient has excreted 800 mL of urine. On physical exam, she is uncomfortable, shivering, and sweating. The surgical site is intact, but the surrounding skin appears red. No drainage is appreciated. The abdominal examination reveals tenderness to palpation and hypoactive bowel sounds. Labs and a clean catch urine specimen are obtained as shown below:
Leukocyte count and differential:
Leukocyte count: 18,000/mm^3
Segmented neutrophils: 80%
Bands: 10%
Eosinophils: 1%
Basophils: < 1%
Lymphocytes: 5%
Monocytes: 4%
Platelet count: 300,000/mm^3
Hemoglobin: 12.5 g/dL
Hematocrit: 42%
Urine:
Epithelial cells: 15/hpf
Glucose: positive
RBC: 1/hpf
WBC: 2/hpf
Bacteria: 50 cfu/mL
Ketones: none
Nitrites: negative
Leukocyte esterase: negative
Which of the following is most likely the cause of this patient’s symptoms?
- A. Surgical error
- B. Post-operative ileus
- C. Wound infection (Correct Answer)
- D. Alcohol withdrawal
- E. Urinary tract infection
Ileus and bowel dysfunction Explanation: ***Wound infection***
- The patient presents with **fever**, worsening **lower abdominal pain**, **tachycardia**, and **local signs of inflammation** (redness around the surgical site, tenderness) one week post-hysterectomy, with a **leukocytosis and left shift** (elevated neutrophils and bands). These findings are highly characteristic of a common **post-surgical wound infection**.
- The lack of significant drainage initially does not rule out infection, and the symptoms are localized to the surgical area.
*Surgical error*
- The operative report and intraoperative cystoscopy indicated the surgery was **uncomplicated**, making an immediate post-operative surgical error less likely to be the primary cause of these symptoms.
- While complications can arise later, the current presentation points more directly to an infectious process rather than an unnoted immediate surgical complication.
*Post-operative ileus*
- Although bowel sounds are hypoactive, the patient is **tolerating an oral diet well** and denies nausea, vomiting, or abdominal distension, which are key symptoms of a clinically significant ileus.
- Her primary complaint is localized pain and systemic signs of infection, rather than generalized abdominal distension and inability to pass flatus or stool.
*Alcohol withdrawal*
- While the patient has a history of alcohol abuse, the primary symptoms (fever, localized abdominal pain, redness around the incision, leukocytosis) are more indicative of an **infectious process** than alcohol withdrawal.
- Alcohol withdrawal typically presents with tremors, agitation, hallucinations, and autonomic instability, and while some overlap (tachycardia) exists, the overall clinical picture doesn't fit.
*Urinary tract infection*
- The urine analysis shows **negative nitrites and leukocyte esterase**, with only 2 WBC/hpf, which makes a **urinary tract infection (UTI) highly unlikely** despite the presence of some bacteria (50 cfu/mL, which is often considered contamination in a clean catch).
- The patient's symptoms are also predominantly localized to the surgical wound area rather than dysuria, frequency, or urgency.
Ileus and bowel dysfunction US Medical PG Question 7: A 28-year-old male presents to his primary care physician with complaints of intermittent abdominal pain and alternating bouts of constipation and diarrhea. His medical chart is not significant for any past medical problems or prior surgeries. He is not prescribed any current medications. Which of the following questions would be the most useful next question in eliciting further history from this patient?
- A. "Does the diarrhea typically precede the constipation, or vice-versa?"
- B. "Is the diarrhea foul-smelling?"
- C. "Please rate your abdominal pain on a scale of 1-10, with 10 being the worst pain of your life"
- D. "Are the symptoms worse in the morning or at night?"
- E. "Can you tell me more about the symptoms you have been experiencing?" (Correct Answer)
Ileus and bowel dysfunction Explanation: ***Can you tell me more about the symptoms you have been experiencing?***
- This **open-ended question** encourages the patient to provide a **comprehensive narrative** of their symptoms, including details about onset, frequency, duration, alleviating/aggravating factors, and associated symptoms, which is crucial for diagnosis.
- In a patient presenting with vague, intermittent symptoms like alternating constipation and diarrhea, allowing them to elaborate freely can reveal important clues that might not be captured by more targeted questions.
*Does the diarrhea typically precede the constipation, or vice-versa?*
- While knowing the sequence of symptoms can be helpful in understanding the **pattern of bowel dysfunction**, it is a very specific question that might overlook other important aspects of the patient's experience.
- It prematurely narrows the focus without first obtaining a broad understanding of the patient's overall symptomatic picture.
*Is the diarrhea foul-smelling?*
- Foul-smelling diarrhea can indicate **malabsorption** or **bacterial overgrowth**, which are important to consider in some gastrointestinal conditions.
- However, this is a **specific symptom inquiry** that should follow a more general exploration of the patient's symptoms, as it may not be relevant if other crucial details are missed.
*Please rate your abdominal pain on a scale of 1-10, with 10 being the worst pain of your life*
- Quantifying pain intensity is useful for assessing the **severity of discomfort** and monitoring changes over time.
- However, for a patient with intermittent rather than acute, severe pain, understanding the **character, location, and triggers** of the pain is often more diagnostically valuable than just a numerical rating initially.
*Are the symptoms worse in the morning or at night?*
- Diurnal variation can be relevant in certain conditions, such as inflammatory bowel diseases where nocturnal symptoms might be more concerning, or functional disorders whose symptoms might be stress-related.
- This is another **specific question** that should come after gathering a more complete initial picture of the patient's symptoms to ensure no key information is overlooked.
Ileus and bowel dysfunction US Medical PG Question 8: A 36-year-old man is seen in the emergency department for back pain that has been getting progressively worse over the last 4 days. Upon further questioning, he also notes that he has been having a tingling and burning sensation rising up from his feet to his knees bilaterally. The patient states he is having difficulty urinating and having bowel movements over the last several days. His temperature is 97.4°F (36.3°C), blood pressure is 122/80 mmHg, pulse is 85/min, respirations are 14/min, and oxygen saturation is 98% on room air. Physical exam is notable for weak leg flexion bilaterally along with decreased anal sphincter tone. Which of the following is the best next step in management?
- A. Emergency surgery
- B. CT
- C. Pulmonary function tests
- D. Lumbar puncture
- E. MRI (Correct Answer)
Ileus and bowel dysfunction Explanation: ***MRI***
- The patient's symptoms (back pain, ascending paresthesias, bladder/bowel dysfunction, and decreased anal sphincter tone) are highly suggestive of **cauda equina syndrome**. An **MRI of the spine** is the gold standard for diagnosing this condition, as it can visualize the spinal cord and nerve roots directly.
- Early diagnosis and intervention with MRI are crucial to prevent **permanent neurological deficits** in cauda equina syndrome.
*Emergency surgery*
- While emergency surgery might be the next step *after* diagnosis, it is **not the initial diagnostic step**. The cause of the cauda equina syndrome (e.g., disc herniation, tumor) must first be identified.
- Performing surgery without proper imaging could lead to operating on the wrong level or for the wrong pathology.
*CT*
- A **CT scan** can provide information about bony structures but is generally **inferior to MRI** for visualizing soft tissue structures like the spinal cord, nerve roots, and intervertebral discs, which are critical in cauda equina syndrome.
- It may miss subtle compressions or pathologies of the nerve roots.
*Pulmonary function tests*
- **Pulmonary function tests** are used to assess lung function and are **irrelevant** to the patient's acute neurological symptoms and back pain.
- This test would not provide any diagnostic information for suspected cauda equina syndrome.
*Lumbar puncture*
- A **lumbar puncture** is primarily used to analyze cerebrospinal fluid for conditions like infection or inflammation (e.g., meningitis, Guillain-Barré syndrome).
- While Guillain-Barré can cause ascending paralysis, the prominent back pain, bowel/bladder dysfunction, and decreased anal sphincter tone make **cauda equina syndrome** a more likely diagnosis, for which LP is not the primary diagnostic tool.
Ileus and bowel dysfunction US Medical PG Question 9: An institutionalized 65-year-old man is brought to the emergency department because of abdominal pain and distension for 12 hours. The pain was acute in onset and is a cramping-type pain associated with nausea, vomiting, and constipation. He has a history of chronic constipation and has used laxatives for years. There is no history of inflammatory bowel disease in his family. He has not been hospitalized recently. There is no recent history of weight loss or change in bowel habits. On physical examination, the patient appears ill. The abdomen is distended with tenderness mainly in the left lower quadrant and is tympanic on percussion. The blood pressure is 110/79 mm Hg, heart rate is 100/min, the respiratory rate is 20/min, and the temperature is 37.2°C (99.0°F). The CBC shows an elevated white blood cell count. The plain abdominal X-ray is shown in the accompanying image. What is the most likely cause of his condition?
- A. Sigmoid volvulus (Correct Answer)
- B. Intussusception
- C. Acute diverticulitis
- D. Toxic megacolon
- E. Colon cancer
Ileus and bowel dysfunction Explanation: ***Sigmoid volvulus***
- The patient’s symptoms of acute **abdominal pain**, distension, and cramping strongly indicate **sigmoid volvulus**, often seen in chronic constipation and institutionalized patients.
- Physical examination revealing **tenderness in the left lower quadrant** and a tympanic abdomen supports the diagnosis of bowel obstruction typically caused by **volvulus**.
*Intussusception*
- Generally presents with **currant jelly stools** and is more common in children; the acute symptoms here are less typical.
- It often involves a **lead point** or associated conditions like **polyps** or tumors, which are not indicated in this case.
*Acute diverticulitis*
- Usually associated with **localized pain** in the left lower quadrant but would present with fever and changes in bowel habits, which the patient lacks.
- Typically shows **peritoneal signs** and may have complications like abscess or perforation, not indicated here.
*Toxic megacolon*
- Commonly associated with underlying **inflammatory bowel disease** or infections, not indicated in this patient with no recent history of **IBD**.
- Symptoms would include severe **diarrhea** and abdominal pain, which do not fit the current acute cramping and constipation pattern.
*Colon cancer*
- While it can cause abdominal symptoms, it presents more insidiously with **weight loss** or **change in bowel habits**, none of which are reported here.
- The acute presentation and findings do not align with a malignancy, which would often be chronic in nature.
Ileus and bowel dysfunction US Medical PG Question 10: A 32-year-old Caucasian female is admitted to the emergency department with a 48-hour history of severe and diffuse abdominal pain, nausea, vomiting, and constipation. Her personal history is unremarkable except for an ectopic pregnancy 5 years ago. Upon admission, she is found to have a blood pressure of 120/60 mm Hg, a pulse of 105/min, a respiratory rate 20/min, and a body temperature of 37°C (98.6°F). She has diffuse abdominal tenderness, hypoactive bowel sounds, and mild distention on examination of her abdomen. Rectal and pelvic examination findings are normal. What is the most likely cause of this patient's condition?
- A. Adhesions (Correct Answer)
- B. Enlarged Peyer’s plaques
- C. Gastrointestinal malignancy
- D. Malrotation
- E. Hernia
Ileus and bowel dysfunction Explanation: ***Adhesions***
- The patient's history of **ectopic pregnancy** is a significant risk factor for **intra-abdominal adhesions**, particularly if surgical intervention was required, which can cause **small bowel obstruction**.
- Symptoms like diffuse abdominal pain, nausea, vomiting, constipation, and hypoactive bowel sounds are classic signs of **bowel obstruction**.
- **Adhesions** are the most common cause of small bowel obstruction in patients with prior abdominal or pelvic procedures.
*Enlarged Peyer's plaques*
- Enlarged Peyer's patches are typically associated with conditions like **intussusception** in children or infections, and less commonly in adults as a cause of obstruction unless severely inflamed.
- This condition does not typically present with a history linked to previous gynecological conditions or procedures that commonly induce adhesive disease.
*Gastrointestinal malignancy*
- While gastrointestinal malignancy can cause bowel obstruction, it's less likely in a 32-year-old without other risk factors for **cancer** (e.g., family history, chronic inflammatory disease, weight loss).
- The acute presentation in a young patient with a history of prior pelvic pathology makes adhesions a much more probable cause than an undiagnosed malignancy.
*Malrotation*
- **Malrotation** is a congenital anomaly usually presenting in **infancy or early childhood** with symptoms like bilious vomiting due to midgut volvulus.
- It is highly unlikely to present for the first time with this constellation of symptoms in a 32-year-old adult.
*Hernia*
- An **external hernia** would typically present with a visible or palpable lump, which was not mentioned in the physical exam findings.
- An **internal hernia** is possible but less common than adhesions as a cause of obstruction, especially in patients with a history of prior abdominal or pelvic pathology.
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