Colorectal Surgery Practice Questions

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

Diverticulosis. **Explanation:** The most common cause of **painless, massive lower gastrointestinal (GI) bleeding** in adults is **Diverticulosis**. While hemorrhoids are the most frequent cause of minor streaks of blood or "bright red blood per rectum," Diverticulosis is statistically the leading cause of significant hematochezia requiring hospitalization. The bleeding occurs because the diverticulum forms at the site where the *vasa recta* (nutrient arteries) penetrate the muscularis propria, leaving the vessel separated from the bowel lumen by only a thin layer of mucosa, making it prone to erosion and rupture. **Analysis of Incorrect Options:** * **B. Hemorrhoids:** These are the most common cause of *minor* rectal bleeding (bright red blood on toilet tissue). However, in the context of clinical "per rectal bleeding" as a primary diagnosis in surgical literature, Diverticulosis is prioritized as the leading cause of significant hemorrhage. * **C. Crohn’s Disease:** While it can cause bloody diarrhea due to mucosal inflammation, it is a much less common cause of gross hematochezia compared to vascular or structural lesions. * **D. Colon Cancer:** This is a common cause of *occult* (hidden) GI bleeding or chronic iron deficiency anemia. While it can cause visible bleeding, it rarely presents as acute, massive hemorrhage. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of massive lower GI bleed:** Diverticulosis. * **Most common site for Diverticula:** Sigmoid Colon (due to high intraluminal pressure). * **Most common site for Diverticular *Bleeding*:** Right Colon (ascending colon), despite diverticula being more common on the left. * **Initial Investigation of Choice:** Colonoscopy (after hemodynamic stabilization). * **Most accurate investigation for active bleeding:** Technetium-99m labeled RBC scan or CT Angiography.

Q: Screening for colon cancer can be done by all the following methods except:

USG abdomen. **Explanation:** The goal of colorectal cancer (CRC) screening is to detect precancerous polyps or early-stage malignancies in asymptomatic individuals. **Why USG Abdomen is the correct answer:** Ultrasonography (USG) of the abdomen is **not** a screening tool for colon cancer. It has poor sensitivity for visualizing hollow viscus organs like the colon due to interference from overlying bowel gas. While USG may detect large masses or liver metastases in advanced cases, it cannot identify small polyps or early mucosal lesions, which is the primary objective of screening. **Analysis of other options:** * **Fecal Occult Blood Test (FOBT/FIT):** A non-invasive stool-based test used to detect occult bleeding. It is a standard initial screening tool; if positive, it must be followed by a colonoscopy. * **Colonoscopy:** Considered the **Gold Standard** for CRC screening. It allows for direct visualization of the entire colon and provides the opportunity for immediate biopsy or polypectomy (diagnostic and therapeutic). * **Flexible Sigmoidoscopy:** A less invasive endoscopic procedure that examines the distal colon (rectum and sigmoid). While it misses proximal lesions, it is a recognized screening modality, often combined with annual FOBT. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Screening Age:** Starts at **45 years** for average-risk individuals (recently updated from 50). * **Gold Standard:** Colonoscopy (performed every 10 years if normal). * **Best Initial Test:** Fecal Immunochemical Test (FIT) is preferred over guaiac-based FOBT due to higher specificity. * **CEA (Carcinoembryonic Antigen):** Not used for screening; it is used for **monitoring recurrence** post-treatment. * **Virtual Colonoscopy (CT Colonography):** A valid screening alternative for those who cannot undergo conventional colonoscopy.

Q: A 30-year-old male patient presents with bleeding per rectum. He complains of hemorrhoids which are reduced spontaneously. What is the treatment of choice?

Sclerotherapy. ### Explanation The patient presents with **Grade II Internal Hemorrhoids**. The clinical hallmark of Grade II hemorrhoids is that they prolapse during defecation but **reduce spontaneously**. **Why Sclerotherapy is correct:** The management of internal hemorrhoids is determined by their grade: * **Grade I & II:** Primarily managed by non-surgical, office-based procedures if conservative measures fail. * **Sclerotherapy** (injection of 5% phenol in almond oil) or **Rubber Band Ligation (RBL)** are the treatments of choice for Grade II. They work by inducing fibrosis, which fixes the mucosa to the underlying muscle and obliterates the vascular channels. **Analysis of Incorrect Options:** * **Sitz bath (Option B):** This is part of conservative management (fiber, fluids, and hygiene). While helpful for symptomatic relief in Grade I, it is often insufficient as a definitive "treatment of choice" when a patient seeks intervention for persistent bleeding in Grade II. * **Open Hemorrhoidectomy (Option A):** This is a surgical procedure (e.g., Milligan-Morgan) reserved for **Grade III and IV** hemorrhoids, or when office-based procedures fail. It is too invasive for Grade II. * **Stapled Hemorrhoidopexy (Option D):** Also known as MIPH (Minimally Invasive Procedure for Hemorrhoids), this is typically indicated for **circumferential Grade III** hemorrhoids. **NEET-PG High-Yield Pearls:** * **Classification:** * Grade I: Bleed only, no prolapse. * Grade II: Prolapse with spontaneous reduction. * Grade III: Prolapse requiring manual reduction. * Grade IV: Permanently prolapsed; irreducible. * **Treatment Summary:** Grades I-II = RBL/Sclerotherapy; Grades III-IV = Surgery (Stapled or Open/Closed Hemorrhoidectomy). * **Anatomy:** Internal hemorrhoids occur above the **dentate line** and are painless (autonomic innervation). External hemorrhoids occur below the line and are painful (somatic innervation).

Q: Which of the following statements about hemorrhoids is false?

Most common location is 9 o'clock. **Explanation:** The correct answer is **D**, as the statement is factually incorrect. Internal hemorrhoids are vascular cushions located in the anal canal. Their anatomical distribution is constant, corresponding to the terminal branches of the superior rectal artery. They are most commonly found at the **3, 7, and 11 o'clock positions** (in the lithotomy position). The 9 o'clock position is not a primary site for hemorrhoid formation. **Analysis of other options:** * **Option A (Not palpable on DRE):** This is **true**. Internal hemorrhoids are soft, compressible vascular cushions. Unless they are severely thrombosed or prolapsed and fibrosed, they cannot be felt during a standard digital rectal examination. Diagnosis usually requires anoscopy. * **Option B (Painless rectal bleeding):** This is **true**. Internal hemorrhoids are located above the dentate line, where the nerve supply is visceral (autonomic). Therefore, they typically present with painless, bright red bleeding ("splashing the pan"). Pain only occurs if there is a complication like thrombosis or strangulation. * **Option C (Arterial bleeding):** This is **true**. Despite being called "varices" in older texts, the bleeding from hemorrhoids is actually **arterial** in nature. This is due to the direct arteriovenous communications within the cushions, which explains why the blood is bright red. **High-Yield Clinical Pearls for NEET-PG:** * **Classification:** Grade I (Bleeding only), Grade II (Prolapse, reduces spontaneously), Grade III (Prolapse, requires manual reduction), Grade IV (Permanently prolapsed). * **Treatment of Choice:** Rubber Band Ligation (Barron’s) is the most common procedure for Grades I-III. Stapled Hemorrhoidopexy (Longo’s) is preferred for circumferential prolapse. * **External Hemorrhoids:** Occur below the dentate line, are covered by anoderm (somatic innervation), and are **painful** if thrombosed.

Q: Which of the following statements about Pilonidal sinus is true?

Treatment of choice is surgical excision of the sinus tract. **Explanation:** Pilonidal sinus is a chronic inflammatory condition occurring primarily in the sacrococcygeal region. The correct answer is **D** because the definitive management of a symptomatic pilonidal sinus involves the complete surgical removal of the sinus tract and its associated hair nests to prevent recurrence. **Why the other options are incorrect:** * **A. More common in females:** This is incorrect. Pilonidal sinus is significantly more common in **males** (ratio approx. 3:1 or 4:1), typically occurring after puberty due to increased hair growth and deeper natal clefts. * **B. Mostly congenital:** This is a historical misconception. It is now widely accepted as an **acquired** condition. It occurs when loose hairs are driven into the skin of the natal cleft by friction and vacuum effects (Jeep driver’s disease). * **C. Prognosis after surgery is poor:** This is incorrect. While recurrence can occur (around 10-15%), the overall prognosis is **good** if the tract is completely excised and postoperative hygiene (hair removal) is maintained. **High-Yield NEET-PG Pearls:** * **Risk Factors:** Obesity, sedentary lifestyle, deep natal cleft, and hirsutism. * **Pathogenesis:** Known as **"Jeep bottom"** or **"Jeep driver’s disease"** due to its prevalence in soldiers during WWII. * **Surgical Techniques:** Options include **Bascom’s procedure** (minimal excision), **Karydakis flap**, or **Limberg flap** (transposition flap) for complex or recurrent cases. * **Primary Aim:** The goal of surgery is to remove the "pith" (hair) and the epithelialized track. Simple incision and drainage are reserved only for acute abscesses, not definitive cure.

Q: A 22-year-old male patient presents with complete rectal prolapse. What is the surgery of choice?

Abdominal rectopexy. **Explanation:** The management of complete rectal prolapse (full-thickness protrusion) is primarily determined by the patient’s age, comorbidities, and fitness for surgery. **1. Why Abdominal Rectopexy is Correct:** In a **young, fit patient** (like this 22-year-old), the **Abdominal Rectopexy** (specifically Laparoscopic Rectopexy) is the gold standard and surgery of choice. Abdominal approaches have significantly **lower recurrence rates** (0–10%) compared to perineal approaches. The procedure involves mobilizing the rectum and fixing it to the sacral promontory, often using mesh (Wells or Ripstein procedure) or sutures (Suture Rectopexy). **2. Why the other options are incorrect:** * **Delorme’s Procedure (Option A):** This is a perineal approach involving mucosal proctectomy and plication of the rectal muscle. It is reserved for elderly, frail patients or those with short-segment prolapse because it has a high recurrence rate (up to 20-30%). * **Altemeier’s Procedure (Options C & D):** Also known as perineal proctosigmoidectomy, this involves a full-thickness resection of the prolapsed bowel via the perineum. While it is the preferred perineal procedure for patients unfit for general anesthesia, it is not the first choice for a young, healthy male due to higher recurrence compared to abdominal rectopexy. **Clinical Pearls for NEET-PG:** * **Gold Standard:** Laparoscopic Abdominal Rectopexy (lowest recurrence). * **Frykman-Goldberg Procedure:** Abdominal rectopexy + Sigmoid colectomy (indicated if the patient has significant pre-existing constipation). * **Thiersch Wiring:** A historical, palliative procedure using a perianal ring; now largely obsolete. * **Key Anatomical Defect:** Complete rectal prolapse is considered a **sliding hernia** through the Pouch of Douglas, associated with a patulous anus and deep rectovesical/rectouterine pouch.

Q: A 60-year-old male presents with a reducible rectal mass that protrudes during defecation and straining. On examination, a full-thickness protrusion through the anus is noted with concentric mucosal folds and a palpable sulcus. He is considered a high anesthetic risk. What is the preferred surgical treatment?

Delorme procedure. ***Delorme procedure*** - **Perineal approach** ideal for **high anesthetic risk** patients as it avoids general anesthesia and abdominal surgery complications. - Involves **mucosal stripping** and **muscle plication** through the anus, making it safer for elderly or frail patients with **complete rectal prolapse**. *Frykman-Goldberg procedure* - **Abdominal approach** requiring **general anesthesia** and laparotomy, unsuitable for high-risk patients. - Combines **posterior mesh fixation** with **sigmoid resection**, carrying higher perioperative risks. *Well's procedure* - **Transabdominal approach** with **anterior sling** and **sigmoid resection**, requiring general anesthesia. - Higher morbidity and mortality risk compared to perineal procedures in **elderly high-risk** patients. *Ripstein procedure* - **Abdominal approach** using **posterior mesh wrap** around the rectum, requiring general anesthesia. - Risk of **mesh erosion** and **constipation** due to rectal constriction, plus unsuitable for high anesthetic risk patients.

Q: Which of the following statements regarding Familial Adenomatous Polyposis (FAP) is FALSE?

Colon cancer usually develops around 20 years of age.. **Explanation:** Familial Adenomatous Polyposis (FAP) is an autosomal dominant condition caused by a mutation in the **APC (Adenomatous Polyposis Coli) gene** on chromosome 5q21. **Why Option D is the Correct (False) Statement:** While polyps begin to appear in the second decade of life (average age 16 years), colon cancer does not typically develop until later. The average age for the development of colorectal cancer in untreated FAP patients is **39–40 years**. Developing cancer at age 20 is rare; however, because the risk becomes nearly 100% by age 40-50, prophylactic proctocolectomy is usually recommended in the late teens or early twenties. **Analysis of Other Options:** * **Option A:** FAP is indeed the **most common** hereditary polyposis syndrome, affecting approximately 1 in 10,000 to 15,000 live births. * **Option B:** The clinical diagnosis of classic FAP requires the presence of **>100 adenomatous polyps**. In many cases, thousands of polyps carpet the colon. * **Option C:** Without surgical intervention (prophylactic colectomy), the progression from adenoma to carcinoma is inevitable, with a lifetime risk of **nearly 100%**. **NEET-PG High-Yield Pearls:** * **Extracolonic Manifestations:** Duodenal adenomas (most common cause of death post-colectomy), desmoid tumors, osteomas, and CHRPE (Congenital Hypertrophy of Retinal Pigment Epithelium). * **Gardner’s Syndrome:** FAP + Osteomas + Soft tissue tumors (sebaceous cysts, desmoids). * **Turcot’s Syndrome:** FAP + CNS tumors (Medulloblastoma). * **Screening:** Starts at age **10–12 years** with annual flexible sigmoidoscopy.

Question 1

What is the most common cause of per rectal bleeding?

Accepted Answer

Diverticulosis

Answer

Hemorrhoids

Answer

Crohn's disease

Answer

Colon cancer

Question 2

Screening for colon cancer can be done by all the following methods except:

Accepted Answer

USG abdomen

Answer

Fecal occult blood test

Answer

Colonoscopy

Answer

Flexible sigmoidoscopy

Question 3

A 30-year-old male patient presents with bleeding per rectum. He complains of hemorrhoids which are reduced spontaneously. What is the treatment of choice?

Accepted Answer

Sclerotherapy

Answer

Open hemorrhoidectomy

Answer

Sitz bath

Answer

Stapled hemorrhoidopexy

Question 4

Which of the following statements about hemorrhoids is false?

Accepted Answer

Most common location is 9 o'clock

Answer

Not palpable on digital rectal examination

Answer

Painless rectal bleeding

Answer

Arterial bleeding

Question 5

Which of the following statements about Pilonidal sinus is true?

Accepted Answer

Treatment of choice is surgical excision of the sinus tract

Answer

More common in females

Answer

Mostly congenital

Answer

Prognosis after surgery is poor

Question 6

A 22-year-old male patient presents with complete rectal prolapse. What is the surgery of choice?

Accepted Answer

Abdominal rectopexy

Answer

Delorme's procedure

Answer

Altemeier rectopexy

Answer

Altemeier rectopexy

Question 7

A 60-year-old male presents with a reducible rectal mass that protrudes during defecation and straining. On examination, a full-thickness protrusion through the anus is noted with concentric mucosal folds and a palpable sulcus. He is considered a high anesthetic risk. What is the preferred surgical treatment?

Accepted Answer

Delorme procedure

Answer

Frykman-Goldberg procedure

Answer

Well's procedure

Answer

Ripstein procedure

Question 8

What is the primary risk associated with acute mechanical large bowel obstruction that necessitates early surgical intervention?

Accepted Answer

Development of a closed-loop obstruction leading to cecal perforation

Answer

Respiratory compromise secondary to abdominal distension

Answer

Fluid and electrolyte derangements resulting from vomiting

Answer

Bacteremia or sepsis originating from intestinal contents

Question 9

Which type of malignancy is most commonly associated with an anorectal fistula?

Accepted Answer

Squamous cell carcinoma

Answer

Transitional cell carcinoma

Answer

Adenocarcinoma

Answer

Columnar cell carcinoma

Question 10

Which of the following statements regarding Familial Adenomatous Polyposis (FAP) is FALSE?

Accepted Answer

Colon cancer usually develops around 20 years of age.

Answer

It is the most common genetic polyposis syndrome.

Answer

More than 100 polyps may be present in the colon.

Answer

The risk of developing colon cancer is 90-100%.

Colorectal Surgery — MCQs

Colorectal Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?