Colorectal Surgery Practice Questions

Q: A 50-year-old male, working as a hotel cook and having four dependent family members, has been diagnosed with early-stage squamous cell carcinoma of the anal canal. He has more than a 60% chance of cure. What is the best treatment option?

Combined chemotherapy and radiotherapy. **Explanation:** The primary goal in treating squamous cell carcinoma (SCC) of the anal canal is **organ preservation** without compromising survival. The standard of care for most stages of anal SCC is the **Nigro Protocol**, which consists of **concurrent Chemoradiotherapy (CRT)**. 1. **Why Option C is correct:** Unlike most gastrointestinal cancers where surgery is the mainstay, anal SCC is highly radiosensitive and chemosensitive. Combined CRT (typically using 5-Fluorouracil and Mitomycin-C) achieves high cure rates (60–90%) while preserving the anal sphincter. This is particularly crucial for this patient, a hotel cook and breadwinner, as it avoids a permanent colostomy and maintains his quality of life and functional status. 2. **Why other options are incorrect:** * **Option A (APR):** Abdomino-perineal resection involves removing the rectum and anus, resulting in a permanent colostomy. It is now reserved only for "salvage surgery" (persistent or recurrent disease after CRT). * **Option B:** Surgery is not typically combined with radiotherapy as a primary approach because CRT alone is usually curative. * **Option D:** Chemotherapy alone is palliative and insufficient for a cure in localized anal SCC. **Clinical Pearls for NEET-PG:** * **Nigro Protocol:** 5-FU + Mitomycin-C + Radiation (45–60 Gy). * **Most common histology:** Squamous Cell Carcinoma (associated with HPV 16 and 18). * **Follow-up:** Digital Rectal Examination (DRE) is the most important tool to assess response, usually 12–26 weeks post-treatment. * **Indication for Surgery (APR):** Only for residual disease, recurrence, or incontinence.

Q: The Bascom technique is employed in the surgical management of which condition?

Pilonidal sinus. **Explanation:** The **Bascom technique** is a specialized surgical approach used for the management of **Pilonidal Sinus Disease (PNS)**. It is based on the principle that pilonidal disease is not a congenital cyst but an acquired condition caused by hair follicles being sucked into the midline pits due to negative pressure created by the movement of the buttocks. The technique involves two main components: 1. **Bascom I (Pit Picking):** Simple excision of the midline pits with lateral drainage of the secondary tracks. 2. **Bascom II (Cleft Lift Procedure):** A more definitive procedure for recurrent or complex cases where the deep natal cleft is flattened by mobilizing a skin flap. This reduces the friction and anaerobic environment that promotes sinus formation. **Analysis of Incorrect Options:** * **A. Rectal Prolapse:** Managed by procedures like Wells rectopexy, Frykman-Goldberg procedure, or Delorme’s procedure. * **B. Anal Incontinence:** Treated via sphincteroplasty, sacral nerve stimulation, or the Gracialis muscle wrap (Pickrell’s procedure). * **C. Fistula-in-ano:** Managed by techniques such as LIFT (Ligation of Intersphincteric Fistula Tract), VAAFT, or Seton placement. **High-Yield Clinical Pearls for NEET-PG:** * **Karydakis Flap:** Another common lateral advancement flap for pilonidal sinus to move the scar away from the midline. * **Z-plasty and Limberg Flap:** Other transposition flaps used to flatten the natal cleft in PNS. * **Lord’s Procedure:** While Lord’s is used for hemorrhoids (dilatation), it is also a historical term for a specific "tuft excision" in pilonidal disease; however, **Bascom** is the more frequently tested eponym for modern PNS surgery.

Q: A 43-year-old male undergoes a total proctocolectomy for ulcerative colitis. The terminal ileum is brought out on the anterior abdominal wall as an end (Brooks) ileostomy. What is necessary to obtain optimal healing?

The ileostomy should be circular rather than square.. ### Explanation The goal of a **Brooke (eversion) ileostomy** is to create a functional, protruding stoma that prevents skin excoriation from caustic ileal effluent. **1. Why Option A is Correct:** To prevent stomal stenosis and ensure optimal healing, the skin incision should be **circular** rather than a simple linear or square cut. A circular excision of the skin and subcutaneous fat (trephining) reduces the risk of cicatricial (scar) contraction. A square or linear incision is more prone to narrowing as it heals, which can lead to stomal outlet obstruction. **2. Why the Other Options are Incorrect:** * **Option B:** In a Brooke ileostomy, the **full thickness** of the everted bowel wall (including the mucosa) is sutured to the **subdermal layer/dermis** of the skin. Suturing only the seromuscular layer would not provide adequate eversion or a secure seal, potentially leading to retraction or serositis. * **Option C:** The mesentery **must be fixed** to the parietal peritoneum (lateral space closure). Failure to fix the mesentery creates a potential space that increases the risk of internal herniation and volvulus. * **Option D:** The mesentery should **never be widely cut**. The blood supply to the terminal ileum is terminal; aggressive mesenteric division compromises the vascularity of the stoma, leading to ischemia, necrosis, and sloughing. ### NEET-PG High-Yield Pearls: * **Ideal Height:** A Brooke ileostomy should protrude **2–3 cm** above the skin level to allow effluent to drop directly into the appliance. * **Site Selection:** It is typically placed at the **McBurney’s point** (right iliac fossa), ensuring it passes through the **rectus abdominis muscle** to minimize the risk of parastomal hernia. * **Primary Eversion:** The "Brooke" technique revolutionized ileostomy by using primary eversion to prevent "stomal serositis," which was common with older non-everted techniques.

Q: A 50-year-old male, working as a hotel cook and having four dependent family members, has been diagnosed with early-stage squamous cell carcinoma of the anal canal. He has more than a 60% chance of cure. Which of the following is the best treatment option?

Combined chemotherapy and radiotherapy. **Explanation:** The management of **Squamous Cell Carcinoma (SCC) of the anal canal** is a classic "high-yield" topic because it deviates from the standard surgical approach used for most gastrointestinal malignancies. **1. Why Option D is Correct:** The standard of care for anal SCC is **Concurrent Chemoradiotherapy (Nigro Protocol)**. This approach is preferred because it achieves high cure rates (over 70-80% in early stages) while **preserving the anal sphincter**. For this patient—a cook and sole breadwinner—maintaining fecal continence and avoiding a permanent colostomy is crucial for his quality of life and livelihood. The regimen typically involves External Beam Radiation Therapy (EBRT) combined with 5-Fluorouracil (5-FU) and Mitomycin-C. **2. Why Other Options are Incorrect:** * **Option A:** Chemotherapy alone is palliative and insufficient for a cure in localized disease. * **Option B:** Abdominoperineal Resection (APR) involves removing the rectum and anus, resulting in a permanent stoma. It was once the gold standard but is now reserved only for **salvage therapy** (recurrent or persistent disease after CRT). * **Option C:** Surgery is not routinely combined with radiotherapy as primary treatment because CRT alone is equally effective and less morbid. **Clinical Pearls for NEET-PG:** * **Nigro Protocol:** 5-FU + Mitomycin + Radiotherapy. * **Most common histology:** Squamous Cell Carcinoma (associated with HPV 16 and 18). * **Anal Margin vs. Anal Canal:** Small (<2cm), well-differentiated tumors of the *anal margin* can be treated with wide local excision, but *anal canal* tumors require the Nigro protocol. * **Follow-up:** Response to CRT is slow; clinical assessment of "cure" is typically done at 12–26 weeks post-treatment.

Q: What is the most common cause of bleeding per rectum?

Hemorrhoids. **Explanation:** **Hemorrhoids (Option A)** are the most common cause of painless bleeding per rectum (hematochezia) in the general population. They are characterized by the displacement and prolapse of the anal cushions. The bleeding typically occurs at the end of defecation, is bright red, and is often described as a "splash in the pan" or "streaking of the stool." **Analysis of Incorrect Options:** * **Fissure in ano (Option B):** While very common, it is the most common cause of **painful** bleeding per rectum. The bleeding is usually minimal (seen on the toilet paper) and associated with intense, tearing pain during and after defecation. * **Diarrhea (Option C):** This is a symptom of various gastrointestinal pathologies (infections, IBD) rather than a primary anatomical cause of rectal bleeding. * **Rectal polyp (Option D):** These are a common cause of rectal bleeding in the **pediatric** age group (specifically juvenile polyps), but they are less frequent than hemorrhoids in the general adult population. **Clinical Pearls for NEET-PG:** * **Most common cause of massive lower GI bleed:** Diverticulosis. * **Most common cause of rectal bleeding in children:** Juvenile polyps. * **Most common site for internal hemorrhoids:** 3, 7, and 11 o’clock positions (lithotomy position). * **Red Flag:** Any patient over 40-50 years presenting with new-onset rectal bleeding must undergo colonoscopy to rule out **Colorectal Carcinoma**, even if hemorrhoids are present.

Question 1

A 20-year-old woman in her ninth month of pregnancy presents with increasing pain on defecation and bright red blood on toilet paper. She had no prior gastrointestinal issues. Following childbirth, her rectal pain resolved and bleeding ceased. What is the most likely diagnosis?

Accepted Answer

Hemorrhoids

Answer

Angiodysplasia

Answer

Intussusception

Answer

Ischemic colitis

Question 2

A 50-year-old male, working as a hotel cook and having four dependent family members, has been diagnosed with early-stage squamous cell carcinoma of the anal canal. He has more than a 60% chance of cure. What is the best treatment option?

Accepted Answer

Combined chemotherapy and radiotherapy

Answer

Abdomino-perineal resection

Answer

Combined surgery and radiotherapy

Answer

Chemotherapy alone

Question 3

Which of the following is NOT true regarding solitary rectal ulcer syndrome?

Accepted Answer

The ulcer primarily involves the anterior rectal wall.

Answer

Approximately 20% of ulcers are multiple.

Answer

Recurrent rectal prolapse is a common predisposing factor.

Answer

Management may include digital repositioning of the rectum.

Question 4

Which of the following is NOT true regarding malignancy arising from Ulcerative colitis?

Accepted Answer

Left-sided disease is more common

Answer

Takes at least 10 years to develop

Answer

Associated with dysplasia in the rest of the colon

Answer

Younger age of onset is associated with an increased chance of carcinoma

Question 5

What is the best investigation to diagnose hemorrhoids?

Accepted Answer

Proctoscopy

Answer

Digital Rectal Examination (DRE)

Answer

Barium enema

Answer

Ultrasound (USG)

Question 6

Piles (hemorrhoids) are most commonly associated with engorgement of which vascular structure?

Accepted Answer

Superior rectal vein

Answer

Inferior rectal vein

Answer

Superior hemorrhoidal artery

Answer

None of the above

Question 7

The Bascom technique is employed in the surgical management of which condition?

Accepted Answer

Pilonidal sinus

Answer

Rectal prolapse

Answer

Anal incontinence

Answer

Fistula-in-ano

Question 8

A 43-year-old male undergoes a total proctocolectomy for ulcerative colitis. The terminal ileum is brought out on the anterior abdominal wall as an end (Brooks) ileostomy. What is necessary to obtain optimal healing?

Accepted Answer

The ileostomy should be circular rather than square.

Answer

The seromuscular layer is sutured to the epithelium of the skin to avoid inflammatory changes.

Answer

The ileostomy must be constructed to avoid fixing the mesentery.

Answer

The mesentery of the ileal loop should be widely cut to increase its mobility.

Question 9

A 50-year-old male, working as a hotel cook and having four dependent family members, has been diagnosed with early-stage squamous cell carcinoma of the anal canal. He has more than a 60% chance of cure. Which of the following is the best treatment option?

Accepted Answer

Combined chemotherapy and radiotherapy

Answer

Chemotherapy alone

Answer

Abdominoperineal resection

Answer

Combined surgery and radiotherapy

Question 10

What is the most common cause of bleeding per rectum?

Accepted Answer

Hemorrhoids

Answer

Fissure in ano

Answer

Diarrhea

Answer

Rectal polyp

Colorectal Surgery — MCQs

Colorectal Surgery — MCQs

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