A 38-year-old man presents with acute onset severe lower back pain and bilateral leg weakness. He has saddle anesthesia and cannot urinate. What is the most appropriate immediate management?
Q2
A 31-year-old man presents with acute severe testicular pain. The pain started suddenly 4 hours ago. Doppler ultrasound shows absent blood flow. What is the expected salvage rate for this condition if treated at this time?
Q3
A 27-year-old man presents with acute onset severe chest pain and dyspnea. He is tall and thin with a marfanoid habitus. Chest X-ray shows a large left-sided pneumothorax. What is the most appropriate management?
Q4
A 46-year-old man presents with sudden onset severe "tearing" chest pain radiating to his back. His blood pressure is 180/100 mmHg in the right arm and 120/80 mmHg in the left arm. What is the most likely diagnosis?
Q5
A 44-year-old woman presents with sudden onset severe right upper quadrant pain radiating to the right shoulder tip. She has had previous episodes of biliary colic. Ultrasound shows gallstones with gallbladder wall thickening (6 mm), pericholecystic fluid, and a positive sonographic Murphy's sign. Blood tests show WBC 15.3×10⁹/L, CRP 78 mg/L. What is the optimal timing for cholecystectomy?
Acute Surgical Presentations UK Medical PG Practice Questions and MCQs
Question 1: A 38-year-old man presents with acute onset severe lower back pain and bilateral leg weakness. He has saddle anesthesia and cannot urinate. What is the most appropriate immediate management?
A. MRI lumbar spine
B. Emergency surgical decompression (Correct Answer)
C. High-dose steroids
D. Catheter insertion
E. Pain relief
Explanation: ***Emergency surgical decompression***
- This patient's presentation with acute severe lower back pain, bilateral leg weakness, **saddle anesthesia**, and inability to urinate is highly indicative of **Cauda Equina Syndrome (CES)**.
- **Emergency surgical decompression** is the most appropriate immediate management to relieve pressure on the compromised **sacral nerve roots** and prevent irreversible neurological deficits, including permanent loss of bladder, bowel, and sexual function.
*MRI lumbar spine*
- An **MRI lumbar spine** is essential for confirming the diagnosis of CES and identifying the exact cause of compression (e.g., massive disc herniation, tumor).
- However, obtaining an MRI, while necessary, should not delay the preparation for **emergency surgical decompression**, as timely intervention is critical for functional recovery.
*High-dose steroids*
- **High-dose steroids** are typically used to reduce inflammation and edema in certain compressive conditions, such as spinal cord injury or epidural compression due to malignancy.
- They are not the primary treatment for **mechanical compression** of the cauda equina, as they do not remove the underlying structural cause of the compression.
*Catheter insertion*
- **Catheter insertion** is an important supportive measure to manage the **urinary retention** and prevent bladder overdistension and damage.
- However, it addresses a symptom rather than the underlying neurological emergency and does not resolve the **spinal cord compression** itself.
*Pain relief*
- Providing adequate **pain relief** is crucial for patient comfort and is part of initial supportive care.
- However, focusing solely on pain relief delays the definitive and urgent surgical intervention required to treat the **neurological emergency** and preserve function.
Question 2: A 31-year-old man presents with acute severe testicular pain. The pain started suddenly 4 hours ago. Doppler ultrasound shows absent blood flow. What is the expected salvage rate for this condition if treated at this time?
A. >95%
B. 80-90% (Correct Answer)
C. 60-70%
D. 40-50%
E. <20%
Explanation: ***80-90%*** - Testicular torsion **salvage rates** are inversely proportional to the duration of **ischemia**, with optimal outcomes expected within the first 6 hours. - At 4 hours, a high **salvage rate** is still anticipated, typically falling within the 80-90% range, reflecting a good prognosis for timely intervention. * >95%* - While rates can approach 100% for interventions within **3 hours**, a 4-hour delay makes achieving greater than 95% less likely. - Maximal **testicular salvage** for absent blood flow requires extremely rapid surgical treatment, making earlier intervention crucial for these peak rates. *60-70%* - This salvage rate is more commonly associated with presentations occurring between **6 and 12 hours** after the onset of torsion. - Beyond 6 hours, the likelihood of irreversible damage to the **seminiferous tubules** significantly increases due to prolonged ischemia. *40-50%* - This lower rate indicates a longer duration of ischemia, typically seen when presentation is between **12 and 24 hours**. - Prolonged lack of **oxygenation** causes extensive testicular necrosis, often leading to the need for orchiectomy. *<20%* - This very low salvage rate applies to cases presenting more than **24 hours** after symptom onset. - At this stage, the testicle is almost universally non-viable due to **irreversible cellular damage** from prolonged ischemia.
Question 3: A 27-year-old man presents with acute onset severe chest pain and dyspnea. He is tall and thin with a marfanoid habitus. Chest X-ray shows a large left-sided pneumothorax. What is the most appropriate management?
A. Observation
B. Needle aspiration
C. Chest drain insertion (Correct Answer)
D. Thoracotomy
E. VATS procedure
Explanation: ***Chest drain insertion*** - A **large pneumothorax** causing acute symptoms (severe chest pain and dyspnea) requires immediate air removal. A **chest drain (tube thoracostomy)** is the most appropriate and definitive management for this.- The patient's **tall, thin build** and **marfanoid habitus** increase the risk for **Primary Spontaneous Pneumothorax (PSP)**, and a symptomatic large pneumothorax in such a patient mandates chest tube placement according to guidelines.*Observation*- **Observation** is generally reserved for **small pneumothoraces (apex to cupola distance <2 cm)** in hemodynamically stable patients with minimal symptoms.- This patient has a **large pneumothorax** with **severe chest pain and dyspnea**, making observation an unsuitable and potentially dangerous approach.*Needle aspiration*- **Needle aspiration** is typically used for **small to moderate** pneumothoraces in stable patients, often as an initial, less invasive step.- Given the **large size** of the pneumothorax and the patient's acute symptoms and Marfanoid habitus, a chest drain provides more reliable and sustained decompression and reduces recurrence risk more effectively than needle aspiration.*Thoracotomy*- **Thoracotomy** is a highly invasive open surgical procedure, not the first-line treatment for an acute, primary spontaneous pneumothorax.- It is usually reserved for **complex cases**, such as recurrent pneumothorax after less invasive surgeries, persistent air leaks, or situations where VATS is contraindicated.*VATS procedure*- The **Video-Assisted Thoracoscopic Surgery (VATS)** procedure is primarily indicated for the *prevention of recurrence* (e.g., pleurodesis, bullectomy) or for managing complications *after initial stabilization* with a chest drain.- It is an elective surgical intervention, not the immediate management for an acute, symptomatic large pneumothorax requiring urgent decompression.
Question 4: A 46-year-old man presents with sudden onset severe "tearing" chest pain radiating to his back. His blood pressure is 180/100 mmHg in the right arm and 120/80 mmHg in the left arm. What is the most likely diagnosis?
A. Myocardial infarction
B. Aortic dissection (Correct Answer)
C. Pulmonary embolism
D. Pericarditis
E. Pneumothorax
Explanation: ***Aortic dissection*** - The presentation of **sudden onset, severe, "tearing" chest pain** radiating to the back is a classic symptom triad for aortic dissection. - The **significant inter-arm systolic blood pressure differential** (e.g., >20 mmHg difference) is a critical finding, indicating potential compromise of a major branch vessel (like the subclavian artery) due to the dissection flap. *Myocardial infarction* - MI pain is typically described as **crushing** or **pressure-like**, radiating to the neck, jaw, or left arm, not typically
Question 5: A 44-year-old woman presents with sudden onset severe right upper quadrant pain radiating to the right shoulder tip. She has had previous episodes of biliary colic. Ultrasound shows gallstones with gallbladder wall thickening (6 mm), pericholecystic fluid, and a positive sonographic Murphy's sign. Blood tests show WBC 15.3×10⁹/L, CRP 78 mg/L. What is the optimal timing for cholecystectomy?
A. Immediate emergency cholecystectomy within 6 hours
B. Early laparoscopic cholecystectomy within 72 hours of symptom onset (Correct Answer)
C. Conservative management with antibiotics followed by interval cholecystectomy at 6-8 weeks
D. Percutaneous cholecystostomy followed by delayed cholecystectomy after 3 months
E. Urgent ERCP within 24 hours followed by cholecystectomy during same admission
Explanation: ***Early laparoscopic cholecystectomy within 72 hours of symptom onset***- The clinical presentation of severe right upper quadrant pain radiating to the shoulder, previous biliary colic, fever, elevated WBC and CRP, alongside ultrasound findings of gallstones, gallbladder wall thickening, pericholecystic fluid, and a positive sonographic Murphy's sign, strongly indicates **acute cholecystitis**.- **Early laparoscopic cholecystectomy (ELC)** within 72 hours of symptom onset is the **gold standard** for acute cholecystitis, as it reduces hospital stay, prevents recurrence, and allows for easier dissection of tissue planes before dense inflammatory adhesions develop.*Immediate emergency cholecystectomy within 6 hours*- While early intervention is crucial, an **immediate emergency operation** within 6 hours is typically reserved for severe, complicated cases such as **gallbladder perforation**, emphysematous cholecystitis, or rapidly deteriorating sepsis.- For uncomplicated acute cholecystitis, a brief period for **fluid resuscitation** and **antibiotic administration** is usually preferred to stabilize the patient before definitive surgery.*Conservative management with antibiotics followed by interval cholecystectomy at 6-8 weeks*- This
