A 66-year-old woman undergoes colonoscopy for investigation of iron deficiency anaemia. A 3.5 cm ulcerated mass is identified in the caecum. Biopsy confirms adenocarcinoma. Staging CT chest, abdomen and pelvis shows the primary tumour with no evidence of distant metastases. She undergoes an uncomplicated laparoscopic right hemicolectomy. Histopathology reports a moderately differentiated adenocarcinoma invading into the muscularis propria (T2), with 0 of 18 lymph nodes involved (N0), and clear resection margins. Mismatch repair (MMR) protein immunohistochemistry shows loss of MLH1 and PMS2 expression. What is the most appropriate next step in management?
Q102
A 49-year-old man with no significant past medical history presents to the surgical outpatient clinic with a 6-month history of a painless right groin swelling that appears on standing and disappears when lying down. On examination, you identify a swelling that extends into the scrotum, is reducible, and has a positive cough impulse. When you place your finger over the deep inguinal ring (at the mid-point of the inguinal ligament) and ask the patient to cough, the hernia is controlled. What is the most likely type of hernia?
Q103
A 63-year-old man with a history of hereditary non-polyposis colorectal cancer (Lynch syndrome) undergoes colonoscopy for surveillance. A 15 mm flat polyp is identified in the ascending colon and is completely excised using endoscopic mucosal resection (EMR). Histology reports a tubulovillous adenoma with high-grade dysplasia, with clear resection margins and no evidence of submucosal invasion. What is the most appropriate surveillance interval for this patient?
Q104
A 28-year-old man presents with a 48-hour history of right iliac fossa pain that initially started periumbilically before localising. He has anorexia, nausea, and one episode of vomiting. On examination, temperature is 37.8°C, heart rate 88 bpm, and blood pressure 132/78 mmHg. He has localised tenderness and guarding in the right iliac fossa. Blood tests show WCC 12.4 × 10⁹/L, CRP 28 mg/L, and normal renal function. An Alvarado score is calculated. What Alvarado score would make acute appendicitis highly likely and support proceeding to surgery without further imaging?
Q105
A 54-year-old woman presents with a 3-month history of intermittent fresh rectal bleeding, change in bowel habit with increased frequency, and 6 kg weight loss. Flexible sigmoidoscopy reveals a fungating circumferential tumour 15 cm from the anal verge. Biopsy confirms moderately differentiated adenocarcinoma. Staging CT shows a tumour invading through the bowel wall into the perirectal fat with four enlarged perirectal lymph nodes (largest 12 mm), but no distant metastases. MRI pelvis reports the tumour is at the level of the middle third of the rectum with no evidence of mesorectal fascia involvement, with a 5 mm clear margin. What is the most appropriate initial treatment?
Q106
A 71-year-old man undergoes elective laparoscopic right inguinal hernia repair using the transabdominal preperitoneal (TAPP) approach. During dissection, the surgeon identifies a hernia sac passing lateral to the inferior epigastric vessels and then curving medially beneath them. What is the most accurate classification of this hernia?
Q107
A 36-year-old woman presents with a 36-hour history of right iliac fossa pain, anorexia, and low-grade fever. She has localised tenderness and guarding in the right iliac fossa with positive Rovsing's sign. Blood tests show WCC 11.5 × 10⁹/L and CRP 38 mg/L. Urinalysis is normal. Ultrasound scan reports a non-compressible tubular structure measuring 9 mm in diameter with increased vascularity, but also demonstrates a 5 cm right ovarian cyst with internal echoes and good through-transmission. What is the most appropriate next investigation?
Q108
A 58-year-old man with newly diagnosed sigmoid colon adenocarcinoma undergoes staging CT chest, abdomen and pelvis which shows a 4 cm primary tumour with extension through the muscularis propria into the pericolonic fat, three enlarged pericolic lymph nodes, and two 1.5 cm lesions in the right lobe of the liver. Liver MRI confirms these are metastases. Carcinoembryonic antigen (CEA) level is 85 ng/mL. Following MDT discussion, what is the most appropriate initial management strategy?
Q109
A 67-year-old woman presents to the emergency department with a 6-hour history of severe pain in her right groin associated with nausea and vomiting. On examination, there is a tense, tender, irreducible lump inferior and lateral to the pubic tubercle. Her temperature is 38.2°C, heart rate 108 bpm, and blood pressure 142/88 mmHg. Blood tests show WCC 15.8 × 10⁹/L and lactate 3.2 mmol/L. What is the most appropriate immediate management?
Q110
A 44-year-old man undergoes emergency appendicectomy for suspected perforated appendicitis. Intraoperatively, the appendix appears macroscopically normal but there is purulent free fluid in the pelvis. The surgeon performs a thorough inspection and identifies a 2 cm perforation in the terminal ileum approximately 60 cm from the ileocaecal valve, with surrounding mesenteric lymphadenopathy and thickened bowel wall. What is the most likely underlying diagnosis?
General Surgery UK Medical PG Practice Questions and MCQs
Question 101: A 66-year-old woman undergoes colonoscopy for investigation of iron deficiency anaemia. A 3.5 cm ulcerated mass is identified in the caecum. Biopsy confirms adenocarcinoma. Staging CT chest, abdomen and pelvis shows the primary tumour with no evidence of distant metastases. She undergoes an uncomplicated laparoscopic right hemicolectomy. Histopathology reports a moderately differentiated adenocarcinoma invading into the muscularis propria (T2), with 0 of 18 lymph nodes involved (N0), and clear resection margins. Mismatch repair (MMR) protein immunohistochemistry shows loss of MLH1 and PMS2 expression. What is the most appropriate next step in management?
A. Routine surveillance only, as this is stage I disease not requiring adjuvant therapy
B. Adjuvant chemotherapy with 6 months of capecitabine or FOLFOX
C. MLH1 promoter hypermethylation testing and BRAF mutation analysis (Correct Answer)
D. Genetic counselling and germline testing for Lynch syndrome
E. PET-CT scan to exclude occult metastatic disease
Explanation: ***MLH1 promoter hypermethylation testing and BRAF mutation analysis***- Initial screening for **Lynch syndrome** involves immunohistochemistry showing loss of **MLH1** and **PMS2**, but in older patients, this is often due to **sporadic somatic hypermethylation** rather than a germline mutation.- Finding an **MLH1 promoter hypermethylation** or a **BRAF V600E mutation** confirms the tumor is sporadic, thus avoiding unnecessary **germline testing** and complex genetic counseling.*Routine surveillance only, as this is stage I disease not requiring adjuvant therapy*- While it is true that **Stage I (T2N0)** disease requires only surveillance, this does not address the clinical requirement to investigate the **mismatch repair (MMR) deficiency** identified on IHC.- Neglecting the IHC findings misses the opportunity to screen for **Lynch syndrome**, which has significant implications for both the patient and their family members.*Adjuvant chemotherapy with 6 months of capecitabine or FOLFOX*- Adjuvant chemotherapy is generally not indicated for **Stage I colon cancer**, as the risk of recurrence is extremely low and the benefit of treatment is negligible.- In the setting of **dMMR/MSI-high** status, tumors are often resistant to **5-FU-based monotherapy**, making chemotherapy even less appropriate for early-stage disease.*Genetic counselling and germline testing for Lynch syndrome*- Direct referral for **germline testing** is premature when MLH1/PMS2 proteins are absent; the **BRAF/hypermethylation** status must be checked first to exclude sporadic cases.- This step follows ONLY if the **MLH1 promoter hypermethylation** test is negative and **BRAF** is wild-type.*PET-CT scan to exclude occult metastatic disease*- A **PET-CT** is not indicated in the standard staging or follow-up for a patient with a fully resected **Stage I (T2N0)** colorectal adenocarcinoma.- **Staging CT** of the chest, abdomen, and pelvis has already been performed and is sufficient for excluding distant metastases in this clinical scenario.
Question 102: A 49-year-old man with no significant past medical history presents to the surgical outpatient clinic with a 6-month history of a painless right groin swelling that appears on standing and disappears when lying down. On examination, you identify a swelling that extends into the scrotum, is reducible, and has a positive cough impulse. When you place your finger over the deep inguinal ring (at the mid-point of the inguinal ligament) and ask the patient to cough, the hernia is controlled. What is the most likely type of hernia?
A. Direct inguinal hernia
B. Indirect inguinal hernia (Correct Answer)
C. Femoral hernia
D. Pantaloon hernia
E. Spigelian hernia
Explanation: ***Indirect inguinal hernia***- This hernia originates at the **deep inguinal ring**, lateral to the **inferior epigastric vessels**, and typically follows the path of the **spermatic cord** into the scrotum.- A **positive internal ring occlusion test** (hernia controlled by pressure over the mid-point of the inguinal ligament) is the diagnostic hallmark differentiating it from a direct hernia.*Direct inguinal hernia*- Protrudes directly through **Hesselbach’s triangle**, medial to the **inferior epigastric vessels**, and is not controlled by occluding the deep inguinal ring.- These are caused by an **acquired weakness** in the posterior wall of the inguinal canal (transversalis fascia) and rarely descend into the **scrotum**.*Femoral hernia*- Emerges through the **femoral canal**, which is located **below and lateral** to the pubic tubercle, unlike inguinal hernias which are above and medial.- More common in **females** and carries a high risk of **incarceration** or strangulation due to the rigid boundaries of the femoral ring.*Pantaloon hernia*- Characterized by the simultaneous presence of both a **direct and indirect** inguinal hernia on the same side, straddling the **inferior epigastric vessels**.- While this can extend into the scrotum, the occlusion test would only partially control the swelling, as the direct component would still bulge.*Spigelian hernia*- Occurs through the **Spigelian fascia** (aponeurosis of the transversus abdominis) near the **semilunar line** at the level of the arcuate line.- It presents as a swelling in the **lateral abdominal wall** and does not pass through the inguinal canal or into the scrotum.
Question 103: A 63-year-old man with a history of hereditary non-polyposis colorectal cancer (Lynch syndrome) undergoes colonoscopy for surveillance. A 15 mm flat polyp is identified in the ascending colon and is completely excised using endoscopic mucosal resection (EMR). Histology reports a tubulovillous adenoma with high-grade dysplasia, with clear resection margins and no evidence of submucosal invasion. What is the most appropriate surveillance interval for this patient?
A. Colonoscopy in 3 months to assess the resection site (Correct Answer)
B. Colonoscopy in 1 year as per standard Lynch syndrome surveillance
C. Colonoscopy in 2 years given the complete excision
D. Colonoscopy in 3 years as the lesion was completely excised
E. Right hemicolectomy is required despite complete endoscopic resection
Explanation: ***Colonoscopy in 3 months to assess the resection site***
- For large or complex polyps (>10mm), especially those with **high-grade dysplasia** or removed via **endoscopic mucosal resection (EMR)**, an early follow-up (3-6 months) is crucial to ensure complete eradication and check for **residual or recurrent adenoma** at the excision site.
- Given the patient's **Lynch syndrome**, which predisposes to rapid progression, and the nature of the 15 mm flat tubulovillous adenoma with high-grade dysplasia, this interval allows for timely detection of any missed or rapidly regrowing lesions.
*Colonoscopy in 1 year as per standard Lynch syndrome surveillance*
- While **Lynch syndrome** patients typically undergo annual or biennial surveillance, the recent removal of a **high-risk polyp** (15mm flat, tubulovillous with high-grade dysplasia) necessitates a more immediate follow-up to assess the resection site.
- Waiting a full year could delay the detection of **residual or recurrent polyp tissue**, which in Lynch syndrome, has a higher risk of rapid progression to cancer.
*Colonoscopy in 2 years given the complete excision*
- This interval is significantly too long for a patient with **Lynch syndrome** and a recent **high-grade dysplasia** polyp, even with clear margins, due to the accelerated adenoma-carcinoma sequence.
- This interval does not align with the increased risk associated with the patient's genetic predisposition and the nature of the excised lesion, making it an inadequate surveillance strategy.
*Colonoscopy in 3 years as the lesion was completely excised*
- A 3-year surveillance interval is typically appropriate for low-risk findings in the general population (e.g., 1-2 small tubular adenomas with low-grade dysplasia), but it is contraindicated in a patient with **Lynch syndrome**.
- This extended interval would significantly increase the risk of developing an advanced lesion or **interval cancer** due to the aggressive nature of polyp growth in Lynch syndrome.
*Right hemicolectomy is required despite complete endoscopic resection*
- A **right hemicolectomy** would be indicated if there was evidence of **submucosal invasion (T1 cancer)** with adverse features (e.g., poorly differentiated histology, lymphovascular invasion, deep submucosal invasion) or if the polyp could not be completely removed endoscopically.
- Since the histology explicitly states **no evidence of submucosal invasion** and **clear resection margins**, the lesion was adequately treated endoscopically, precluding the need for surgical resection at this stage.
Question 104: A 28-year-old man presents with a 48-hour history of right iliac fossa pain that initially started periumbilically before localising. He has anorexia, nausea, and one episode of vomiting. On examination, temperature is 37.8°C, heart rate 88 bpm, and blood pressure 132/78 mmHg. He has localised tenderness and guarding in the right iliac fossa. Blood tests show WCC 12.4 × 10⁹/L, CRP 28 mg/L, and normal renal function. An Alvarado score is calculated. What Alvarado score would make acute appendicitis highly likely and support proceeding to surgery without further imaging?
A. 3-4
B. 5-6
C. 7-8
D. 9-10 (Correct Answer)
E. Any score above 5 is sufficient for surgery
Explanation: ***9-10***- A score of **9-10** is interpreted as **highly likely appendicitis**, where clinical suspicion is sufficient to justify surgical intervention without mandatory delay for imaging.- The **Alvarado score** (MANTRELS) assigns maximum weight to **Right Iliac Fossa (RIF) tenderness** (2 points) and **Leukocytosis** (2 points), with high scores having high specificity.*3-4*- An Alvarado score of **1-4** indicates that appendicitis is **unlikely** and the patient can typically be discharged with safety netting.- These patients do not require surgical consultation or imaging unless their clinical condition deteriorates significantly.*5-6*- Scores of **5-6** are considered **possible appendicitis**, necessitating further observation or **imaging** like ultrasound or CT.- This range is equivocal and does not provide enough diagnostic certainty to proceed directly to the operating theatre.*7-8*- A score of **7-8** suggests **probable appendicitis**, which warrants surgical consultation and often imaging to confirm the diagnosis.- While the probability is high, it falls short of the "highly likely" threshold that traditionally bypassed modern diagnostic imaging requirements.*Any score above 5 is sufficient for surgery*- Proceeding to surgery based solely on a score of **5 or 6** would result in an unacceptably high **negative appendectomy rate**.- Modern surgical guidelines emphasize either **imaging** for equivocal scores or a score of **9+** to minimize unnecessary invasive procedures.
Question 105: A 54-year-old woman presents with a 3-month history of intermittent fresh rectal bleeding, change in bowel habit with increased frequency, and 6 kg weight loss. Flexible sigmoidoscopy reveals a fungating circumferential tumour 15 cm from the anal verge. Biopsy confirms moderately differentiated adenocarcinoma. Staging CT shows a tumour invading through the bowel wall into the perirectal fat with four enlarged perirectal lymph nodes (largest 12 mm), but no distant metastases. MRI pelvis reports the tumour is at the level of the middle third of the rectum with no evidence of mesorectal fascia involvement, with a 5 mm clear margin. What is the most appropriate initial treatment?
A. Immediate anterior resection with total mesorectal excision
B. Long-course neoadjuvant chemoradiotherapy followed by anterior resection (Correct Answer)
C. Short-course neoadjuvant radiotherapy followed by immediate anterior resection
D. Neoadjuvant chemotherapy alone followed by anterior resection
E. Transanal endoscopic microsurgery (TEMS) for local excision
Explanation: ***Long-course neoadjuvant chemoradiotherapy followed by anterior resection***
- This patient has **locally advanced rectal cancer** (T3, N1 based on perirectal fat invasion and enlarged nodes), which carries a higher risk of local recurrence and necessitates **downstaging**.
- **Long-course chemoradiotherapy** is indicated to maximize **tumor regression** and local control before definitive surgery with **Total Mesorectal Excision (TME)**.
*Immediate anterior resection with total mesorectal excision*
- Performing surgery immediately for **node-positive T3 disease** increases the risk of positive margins and subsequent **local recurrence**.
- Neoadjuvant therapy is required in this case because the node status (N1) and extra-mural spread categorize the tumor as high-risk.
*Short-course neoadjuvant radiotherapy followed by immediate anterior resection*
- Short-course radiotherapy is generally reserved for **borderline resectable** cases or moderate-risk tumors where significant **downstaging** is not the primary goal.
- In N1 disease, long-course therapy is often preferred to allow more time for the tumor and nodes to shrink before surgical intervention.
*Neoadjuvant chemotherapy alone followed by anterior resection*
- **Radiotherapy** is a critical component of the neoadjuvant protocol for rectal cancer because it specifically targets the **mesorectal envelope** to prevent pelvic recurrence.
- Chemotherapy alone is not the standard of care for locally advanced rectal cancer unless there are specific contraindications to radiation or the patient is part of a clinical trial.
*Transanal endoscopic microsurgery (TEMS) for local excision*
- TEMS is only appropriate for early-stage **T1 tumors** with no evidence of lymph node involvement and favorable histological features.
- This patient's cancer is **fungating, circumferential, and N1**, making it entirely unsuitable for local excision methods.
Question 106: A 71-year-old man undergoes elective laparoscopic right inguinal hernia repair using the transabdominal preperitoneal (TAPP) approach. During dissection, the surgeon identifies a hernia sac passing lateral to the inferior epigastric vessels and then curving medially beneath them. What is the most accurate classification of this hernia?
A. Direct inguinal hernia
B. Indirect inguinal hernia
C. Pantaloon hernia (Correct Answer)
D. Sliding inguinal hernia
E. Femoral hernia
Explanation: ***Pantaloon hernia***
- This refers to a **dual hernia** where both direct and indirect sacs are present, straddling the **inferior epigastric vessels** like a pair of trousers.
- The description of a sac passing **lateral** (indirect) and then curving **medially** beneath the vessels (direct) is characteristic of this combined defect.
*Direct inguinal hernia*
- Occurs **medial** to the inferior epigastric vessels through **Hesselbach's triangle** due to a weakness in the transversalis fascia.
- It does not involve a component passing through the **deep inguinal ring** lateral to the vessels.
*Indirect inguinal hernia*
- Protrudes through the **deep inguinal ring**, staying **lateral** to the inferior epigastric vessels throughout its course.
- While this case mentions a lateral component, the additional medial curve beneath the vessels indicates a combined defect.
*Sliding inguinal hernia*
- A type where a portion of an **abdominal viscus** (like the cecum or bladder) form part of the hernia sac wall.
- This term describes the **content and wall** of the sac rather than the anatomical relationship to the epigastric vessels.
*Femoral hernia*
- Located **inferior to the inguinal ligament** and medial to the femoral vein through the femoral canal.
- It is not classified by its relationship to the **inferior epigastric artery** in the same manner as inguinal hernias.
Question 107: A 36-year-old woman presents with a 36-hour history of right iliac fossa pain, anorexia, and low-grade fever. She has localised tenderness and guarding in the right iliac fossa with positive Rovsing's sign. Blood tests show WCC 11.5 × 10⁹/L and CRP 38 mg/L. Urinalysis is normal. Ultrasound scan reports a non-compressible tubular structure measuring 9 mm in diameter with increased vascularity, but also demonstrates a 5 cm right ovarian cyst with internal echoes and good through-transmission. What is the most appropriate next investigation?
A. CT abdomen and pelvis with IV contrast
B. Proceed directly to diagnostic laparoscopy
C. MRI pelvis to better characterise the ovarian cyst
D. Repeat ultrasound in 6 weeks following conservative management
E. Serum CA-125 and beta-hCG levels (Correct Answer)
Explanation: ***Serum CA-125 and beta-hCG levels***
- In a woman of childbearing age presenting with right iliac fossa pain and an ovarian finding, it is vital to exclude **ectopic pregnancy** with a **beta-hCG** and risk-stratify the cyst using **CA-125**.
- While the ultrasound findings are highly suggestive of **acute appendicitis** (9mm non-compressible structure), baseline markers are necessary before surgical intervention to ensure appropriate operative planning and **ovarian conservation**.
*CT abdomen and pelvis with IV contrast*
- Although CT is highly sensitive for appendicitis, it involves **ionizing radiation** which should be avoided in pre-menopausal women if the diagnosis is already clearly suggested by clinical and ultrasound findings.
- A CT scan would not substitute for the biochemical information provided by **pregnancy testing** and tumor markers needed for clinical decision-making.
*Proceed directly to diagnostic laparoscopy*
- Though laparoscopy is both diagnostic and therapeutic, proceeding without a **beta-hCG** is unsafe as it could overlook an **ectopic pregnancy** or complicate the management of an undiagnosed malignancy.
- Pre-operative markers help determine if a **gynecologist** should be present or if special precautions are needed regarding the 5 cm cyst.
*MRI pelvis to better characterise the ovarian cyst*
- MRI is excellent for soft tissue characterization but would cause an **unnecessary delay** in the treatment of suspected acute appendicitis.
- The priority is to address the acute inflammatory process (appendicitis) rather than obtaining advanced imaging for a likely **functional cyst**.
*Repeat ultrasound in 6 weeks following conservative management*
- Conservative management is inappropriate in this patient due to the high clinical suspicion of **appendicitis** (tenderness, guarding, raised **CRP**, and positive ultrasound findings).
- Delaying treatment for 6 weeks carries a high risk of **appendix perforation** and generalized peritonitis.
Question 108: A 58-year-old man with newly diagnosed sigmoid colon adenocarcinoma undergoes staging CT chest, abdomen and pelvis which shows a 4 cm primary tumour with extension through the muscularis propria into the pericolonic fat, three enlarged pericolic lymph nodes, and two 1.5 cm lesions in the right lobe of the liver. Liver MRI confirms these are metastases. Carcinoembryonic antigen (CEA) level is 85 ng/mL. Following MDT discussion, what is the most appropriate initial management strategy?
A. Radiofrequency ablation of liver metastases followed by sigmoid colectomy
B. Palliative chemotherapy only, as curative surgery is not possible
C. Synchronous sigmoid colectomy and liver metastasectomy
D. Sigmoid colectomy followed by adjuvant chemotherapy, with liver metastases reassessed for resection
E. Neoadjuvant chemotherapy followed by reassessment for surgery (Correct Answer)
Explanation: ***Neoadjuvant chemotherapy followed by reassessment for surgery***
- This patient has **Stage IV colorectal cancer** with synchronous liver metastases; starting with **systemic chemotherapy** addresses micrometastatic disease and assesses **tumor biology** before invasive surgery.
- Since the patient is asymptomatic (no obstruction or perforation), chemotherapy can **downstage** lesions, potentially allowing for a more successful curative-intent resection later.
*Radiofrequency ablation of liver metastases followed by sigmoid colectomy*
- **Radiofrequency ablation (RFA)** is generally reserved for patients unfit for surgery or as an adjunct when small lesions (<3cm) remain after resection, rather than as an initial standalone treatment.
- Treating the liver in isolation ignores the **primary tumor** and the potential for **occult systemic spread** which is better managed initially by chemotherapy.
*Palliative chemotherapy only, as curative surgery is not possible*
- Curative intent is still possible because the liver metastases are **limited (oligometastatic)** and confined to a single lobe, making them potentially **resectable**.
- Palliative care is only appropriate for **unresectable disease** or patients with poor **performance status** who cannot tolerate curative-intent protocols.
*Synchronous sigmoid colectomy and liver metastasectomy*
- While technically possible, **synchronous resection** carries higher surgical morbidity and does not allow for the assessment of **chemosensitivity** or disease stabilization via neoadjuvant therapy.
- Upfront surgery risks performing major procedures on patients who may manifest rapid **disease progression** despite surgical intervention.
*Sigmoid colectomy followed by adjuvant chemotherapy, with liver metastases reassessed for resection*
- Surgery for the primary tumor is only prioritized if there is **obstruction, perforation, or significant bleeding**, none of which are indicated in this case.
- Delaying systemic treatment to recover from a colectomy allows **liver metastases** to potentially progress, losing the window for curative intervention.
Question 109: A 67-year-old woman presents to the emergency department with a 6-hour history of severe pain in her right groin associated with nausea and vomiting. On examination, there is a tense, tender, irreducible lump inferior and lateral to the pubic tubercle. Her temperature is 38.2°C, heart rate 108 bpm, and blood pressure 142/88 mmHg. Blood tests show WCC 15.8 × 10⁹/L and lactate 3.2 mmol/L. What is the most appropriate immediate management?
A. Urgent CT scan to confirm the diagnosis before any intervention
B. Attempt manual reduction with analgesia and sedation
C. Emergency surgical exploration and hernia repair (Correct Answer)
D. Ultrasound-guided aspiration of the hernia contents
E. Conservative management with nasogastric decompression and IV antibiotics
Explanation: ***Emergency surgical exploration and hernia repair***- The patient presents with clinical signs of a **strangulated femoral hernia** (lump below and lateral to the **pubic tubercle**), which is a surgical emergency.- Systemic indicators such as **fever**, **elevated white cell count (WCC)**, and **raised lactate** suggest bowel ischemia and require immediate operative intervention to prevent necrosis.*Urgent CT scan to confirm the diagnosis before any intervention*- While the diagnosis can be confirmed via imaging, this is a **clinical diagnosis** and delaying surgery for a scan increases the risk of **bowel perforation**.- Imaging is reserved for cases where the diagnosis is uncertain; however, this presentation is classically indicative of a **femoral hernia** complication.*Attempt manual reduction with analgesia and sedation*- Manual reduction is strictly **contraindicated** in cases of suspected **strangulated hernias** due to the risk of reducing necrotic bowel back into the peritoneal cavity.- This can lead to **reduction en masse** or concealed perforation, significantly increasing morbidity and mortality.*Ultrasound-guided aspiration of the hernia contents*- This is never a standard treatment for hernias and carries a high risk of **bowel injury** or spreading infection/faecal matter if the bowel is perforated.- It fails to address the underlying **mechanical obstruction** or the ischemia caused by the tight neck of the **femoral canal**.*Conservative management with nasogastric decompression and IV antibiotics*- Conservative measures are only supportive and do not resolve the **vascular compromise** caused by the incarceration of the hernia.- Delaying surgery while waiting for conservative measures to work will inevitably lead to **bowel gangrene** and septic shock.
Question 110: A 44-year-old man undergoes emergency appendicectomy for suspected perforated appendicitis. Intraoperatively, the appendix appears macroscopically normal but there is purulent free fluid in the pelvis. The surgeon performs a thorough inspection and identifies a 2 cm perforation in the terminal ileum approximately 60 cm from the ileocaecal valve, with surrounding mesenteric lymphadenopathy and thickened bowel wall. What is the most likely underlying diagnosis?
A. Perforated Meckel's diverticulum
B. Perforated terminal ileal Crohn's disease (Correct Answer)
C. Perforated carcinoid tumour of the terminal ileum
D. Perforated ileal lymphoma
E. Perforated typhoid perforation
Explanation: ***Perforated terminal ileal Crohn's disease***- Crohn's disease characteristically causes **transmural inflammation**, leading to a **thickened bowel wall** and **mesenteric lymphadenopathy**, frequently involving the **terminal ileum**.- **Perforation** in Crohn's disease can occur due to deep ulcerations or strictures, often presenting acutely with purulent fluid and mimicking other acute abdominal conditions.*Perforated Meckel's diverticulum*- While typically located around **60 cm from the ileocaecal valve**, a Meckel's diverticulum is an **outpouching**, not generalized thickening of the bowel wall.- Perforation is usually due to **ectopic gastric mucosa** causing ulceration or diverticulitis, and less commonly associated with significant surrounding mesenteric lymphadenopathy and diffuse bowel wall thickening.*Perforated carcinoid tumour of the terminal ileum*- **Carcinoid tumours** are neuroendocrine tumours that can occur in the terminal ileum and cause **mesenteric fibrosis**, but they rarely present primarily with **free perforation** and purulent peritonitis.- They typically cause symptoms related to **obstruction** or **carcinoid syndrome**, and are less likely to cause the diffuse bowel wall thickening seen in this case.*Perforated ileal lymphoma*- **Primary intestinal lymphoma** can cause perforation, but it often presents as a **bulky mass** and is a less common cause of acute perforated inflammatory bowel disease than Crohn's.- While **lymphadenopathy** can be present, the specific description of a "thickened bowel wall" with an acute perforation points more towards an inflammatory process like Crohn's.*Perforated typhoid perforation*- **Typhoid perforation** involves the Peyer's patches in the terminal ileum but is usually preceded by a significant **febrile illness** and a history of exposure or travel to endemic areas.- The presentation typically lacks the prominent **bowel wall thickening** and **mesenteric lymphadenopathy** as described, which are hallmarks of Crohn's disease.
