General Surgery Principles — MCQs

A 39-year-old man presents with sudden onset abdominal pain in the groin area, which began while lifting a scaffold. He underwent an appendectomy 3 months prior. Physical examination reveals a reducible bulge in the right groin area, exacerbated by increased intra-abdominal pressure. Radiographs and laboratory studies show no signs of strangulation. Which of the following nerves was most likely damaged during the appendectomy procedure?

Q587Easy

Splenectomy is not indicated in which of the following pathologies?

Q588Easy

What is the best management for a contaminated wound with necrotic material?

Q589Medium

What is the surgical treatment for a parotid tumor involving the deep lobe?

Q590Easy

Which of the following is a cause of secondary hemorrhage?

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 581: Vicryl, a commonly used suture material, is a?

A. Homopolymer of polydioxanone
B. Co-polymer of glycolide and lactide (Correct Answer)
C. Homopolymer of glycolide
D. Homopolymer of lactide

Explanation: **Explanation:** **Vicryl (Polyglactin 910)** is a synthetic, absorbable, braided suture. It is a **co-polymer** composed of **glycolide and lactide** in a specific ratio of **90:10**. The addition of lactide makes the suture more hydrophobic, which slows down the rate of hydrolysis compared to pure polyglycolic acid, providing better tensile strength retention during the critical wound-healing phase. **Analysis of Options:** * **Option A (Homopolymer of polydioxanone):** This describes **PDS II**. Unlike Vicryl, PDS is a monofilament suture known for its prolonged tensile strength (up to 6 weeks) and is often used in pediatric cardiac surgery or abdominal wall closure. * **Option C (Homopolymer of glycolide):** This describes **Dexon** (Polyglycolic acid). While similar to Vicryl, it lacks the lactide component, making it slightly more prone to rapid loss of tensile strength in moist environments. * **Option D (Homopolymer of lactide):** Pure polylactide is generally used in orthopedic implants (like screws or plates) rather than flexible sutures, as it is too rigid. **Clinical Pearls for NEET-PG:** * **Absorption Mechanism:** Vicryl is absorbed by **non-enzymatic hydrolysis**. * **Tensile Strength:** It retains approximately 75% strength at 2 weeks and 50% at 3 weeks. All strength is typically lost by 5 weeks. * **Complete Absorption:** Usually occurs between **56 to 70 days**. * **Vicryl Rapide:** A specialized version treated to allow faster absorption (complete in 42 days), ideal for skin or mucosal closure. * **Vicryl Plus:** Coated with **Triclosan**, an antibacterial agent to reduce the risk of Surgical Site Infections (SSI).

Question 582: What is a Wolfe graft?

A. Thin split-thickness graft
B. Full-thickness skin graft (Correct Answer)
C. Local flap
D. Free flap

Explanation: ### Explanation A **Wolfe graft** is the eponym for a **Full-Thickness Skin Graft (FTSG)**. It involves the surgical removal of the entire epidermis and the complete thickness of the dermis, excluding the underlying subcutaneous fat. **Why Option B is Correct:** Unlike split-thickness grafts, a Wolfe graft includes the full depth of the dermis. This makes it more resistant to secondary contraction and provides better cosmetic results, texture, and durability. Because it is thicker, it does not rely on simple diffusion alone; it requires a well-vascularized recipient bed for successful "take" (plasmatic imbibition followed by inosculation). **Why Other Options are Incorrect:** * **Option A (Thin split-thickness graft):** Also known as a **Thiersch graft**, this includes the epidermis and only a thin superficial layer of the dermis. It heals the donor site spontaneously but is prone to significant contraction. * **Option C & D (Local/Free Flaps):** Flaps differ from grafts because they maintain their own intrinsic blood supply (pedicled or microvascular anastomosis). A Wolfe graft is completely detached from its blood supply and depends entirely on the recipient bed for nourishment. **High-Yield Clinical Pearls for NEET-PG:** * **Common Donor Sites:** Post-auricular area (best color match for face), supraclavicular fossa, and groin crease. * **Primary vs. Secondary Contraction:** Wolfe grafts have **high primary contraction** (shrinks immediately after harvesting due to elastin in the dermis) but **minimal secondary contraction** (shrinks very little during healing), making them ideal for functional areas like eyelids and fingers. * **The "Take":** The three stages of graft survival are Plasmatic Imbibition (0–48h), Inosculation (48h–72h), and Revascularization/Capillary ingrowth (Day 3+).

Question 583: The Hilton method is best used for the management of which of the following conditions?

A. Breast abscess
B. Axillary abscess (Correct Answer)
C. Paronychia
D. Pulp abscess

Explanation: **Explanation:** The **Hilton method** (also known as Hilton’s method of incision and drainage) is a surgical technique used to drain deep-seated abscesses located in areas containing vital structures like major nerves or large blood vessels. **Why Axillary Abscess is the correct answer:** The axilla is a high-risk anatomical zone containing the axillary artery, vein, and the brachial plexus. In the Hilton method, only the skin and superficial fascia are incised with a scalpel. A pair of blunt sinus forceps or hemostats is then pushed through the deep fascia into the abscess cavity. The blades are opened and withdrawn while open to enlarge the track. This **blunt dissection** ensures that the pus is evacuated without the risk of an sharp blade accidentally injuring the underlying neurovascular bundle. **Analysis of Incorrect Options:** * **Breast Abscess:** While some deep breast abscesses can be drained this way, the standard treatment is usually a radial incision to avoid cutting across lactiferous ducts. * **Paronychia:** This is a superficial infection around the nail fold. It is managed by simple incision or partial nail avulsion; deep blunt dissection is unnecessary. * **Pulp Abscess (Whitlow):** These are managed by a lateral incision on the finger. The anatomy is confined by fibrous septa, making the blunt Hilton technique impractical and ineffective. **Clinical Pearls for NEET-PG:** * **Indications:** Best for abscesses in the **Axilla**, **Groin** (near femoral vessels), and **Neck** (near carotid sheath). * **Key Step:** Always use **blunt forceps** once the skin is breached. * **High-Yield Fact:** The method minimizes the risk of secondary hemorrhage and nerve palsy in "danger zones" of the body.

Question 584: What is true about pelvic abscess?

A. An uncommon cause of intraperitoneal abscess.
B. Identified by CT scan if there is a full bladder.
C. Associated with pyothorax.
D. May spontaneously drain via the rectum. (Correct Answer)

Explanation: **Explanation:** A **pelvic abscess** is a localized collection of pus in the lowest part of the peritoneal cavity (the Pouch of Douglas in females or the rectovesical pouch in males). It most commonly occurs as a complication of acute appendicitis, pelvic inflammatory disease (PID), or diverticulitis. **Why Option D is Correct:** The Pouch of Douglas is anatomically adjacent to the anterior wall of the rectum. As an abscess matures and tension increases, the inflammatory process can cause the abscess to track toward the path of least resistance. It may **spontaneously rupture and drain into the rectum**, often resulting in a sudden relief of symptoms and the passage of pus and mucus per rectum. **Analysis of Incorrect Options:** * **Option A:** Pelvic abscess is actually the **most common** site for an intraperitoneal abscess because the pelvis is the most dependent part of the peritoneal cavity where infected peritoneal fluid naturally gravitates. * **Option B:** While CT is the gold standard for diagnosis, a **full bladder is not required**; in fact, a full bladder can sometimes displace loops of bowel or the abscess itself, making visualization more difficult. Ultrasound (transvaginal or transrectal) is also highly effective. * **Option C:** Pyothorax (empyema) is an accumulation of pus in the pleural cavity. While subphrenic abscesses can cause sympathetic pleural effusions, a pelvic abscess is anatomically distant and not typically associated with pyothorax. **NEET-PG High-Yield Pearls:** * **Clinical Presentation:** Characterized by "swinging" pyrexia, pelvic pain, and **rectal symptoms** (diarrhea and tenesmus due to rectal irritation). * **Diagnosis:** A digital rectal examination (DRE) typically reveals a **boggy, tender swelling** in the anterior rectal wall. * **Treatment:** The surgical principle is "Ubi pus, ibi evacua" (where there is pus, evacuate it). If it doesn't drain spontaneously, it is formally drained via the rectum (proctotomy) or the posterior vaginal fornix (colpotomy).

Question 585: A 30-year-old lady presents with fever and pain in the right hypochondrium, with a positive breath catch on palpation. What is the most likely clinical diagnosis?

A. Acute pancreatitis
B. Acute cholecystitis (Correct Answer)
C. Acute appendicitis
D. Acute mediastinitis

Explanation: ### Explanation **Correct Answer: B. Acute cholecystitis** The clinical presentation of fever, right hypochondriac pain, and a **"positive breath catch"** is the classic description of **Murphy’s Sign**, which is pathognomonic for acute cholecystitis. **Underlying Concept:** When a patient takes a deep breath, the diaphragm descends, pushing the inflamed gallbladder against the examiner’s stationary hand in the right hypochondrium. The contact between the inflamed parietal peritoneum and the gallbladder causes sharp pain, leading to a sudden arrest (catch) of inspiration. **Analysis of Incorrect Options:** * **A. Acute pancreatitis:** Typically presents with epigastric pain radiating to the back, often relieved by leaning forward. It does not typically elicit a positive Murphy’s sign. * **C. Acute appendicitis:** Usually presents with periumbilical pain migrating to the Right Iliac Fossa (McBurney’s point). While a high-lying (subhepatic) appendix can mimic gallbladder pain, Murphy’s sign is specific to the gallbladder. * **D. Acute mediastinitis:** Presents with retrosternal chest pain and systemic sepsis, usually following esophageal perforation or cardiac surgery; it has no association with abdominal palpation findings. **NEET-PG High-Yield Pearls:** * **Murphy’s Sign:** High sensitivity but lower specificity in the elderly. * **Boas’ Sign:** Hyperesthesia (increased sensitivity to touch) below the right scapula (distal distribution of the phrenic nerve), also seen in acute cholecystitis. * **Investigation of Choice:** Ultrasonography (USG) is the initial investigation; **HIDA scan** is the most sensitive (Gold Standard) for diagnosis. * **Saint’s Triad:** Cholelithiasis, Hiatus hernia, and Diverticulosis.

Question 586: A 39-year-old man presents with sudden onset abdominal pain in the groin area, which began while lifting a scaffold. He underwent an appendectomy 3 months prior. Physical examination reveals a reducible bulge in the right groin area, exacerbated by increased intra-abdominal pressure. Radiographs and laboratory studies show no signs of strangulation. Which of the following nerves was most likely damaged during the appendectomy procedure?

A. Femoral
B. Genitofemoral
C. Ilioinguinal (Correct Answer)
D. Obturator

Explanation: ### **Explanation** **1. Why Ilioinguinal Nerve is Correct:** The patient presents with an **inguinal hernia** following a recent appendectomy. The **ilioinguinal nerve (L1)** is the most commonly injured nerve during an open appendectomy (specifically via McBurney’s or Lanz incision). This nerve runs between the internal oblique and transversus abdominis muscles and supplies the **conjoint tendon**. Damage to this nerve leads to weakness or paralysis of the conjoint tendon, which normally reinforces the posterior wall of the inguinal canal. This structural weakness creates a predisposition for the development of an **indirect inguinal hernia** post-operatively. **2. Analysis of Incorrect Options:** * **A. Femoral Nerve:** Located deep to the iliac fascia and lateral to the femoral artery. It is not typically encountered or at risk during a standard superficial appendectomy. * **B. Genitofemoral Nerve:** The genital branch enters the inguinal canal through the deep ring. While it can be injured during *laparoscopic* hernia repairs (leading to loss of cremasteric reflex), it is not the primary nerve damaged during an appendectomy that leads to hernia formation. * **C. Obturator Nerve:** This nerve travels through the obturator canal in the true pelvis. It is far removed from the site of an appendectomy incision. **3. NEET-PG High-Yield Pearls:** * **Nerve at risk in Open Appendectomy:** Ilioinguinal nerve (leads to inguinal hernia). * **Nerve at risk in Open Inguinal Hernia Repair:** Ilioinguinal nerve (most common; leads to numbness in the scrotum/labia majora and root of the penis). * **Nerve at risk in Laparoscopic Hernia Repair:** Lateral cutaneous nerve of the thigh (most common; leads to meralgia paresthetica) and Genitofemoral nerve. * **The "Triangle of Pain":** A zone during laparoscopy bounded by the spermatic vessels and iliopubic tract where the femoral, genitofemoral, and lateral cutaneous nerves reside. Avoid tacking/stapling here.

Question 587: Splenectomy is not indicated in which of the following pathologies?

A. Sarcoidosis (Correct Answer)
B. Trauma
C. ITP
D. Hereditary spherocytosis

Explanation: **Explanation:** The decision for splenectomy is based on whether the spleen is the primary site of pathology or if its removal will significantly alter the disease course. **Why Sarcoidosis is the correct answer:** Sarcoidosis is a systemic granulomatous disease. While it can cause splenomegaly (in about 5–10% of cases), the spleen is rarely the primary organ of concern. Splenectomy is **not** a standard treatment for sarcoidosis unless there is a rare complication like symptomatic massive splenomegaly or severe hypersplenism causing refractory cytopenia. Management primarily involves systemic corticosteroids. **Why the other options are incorrect:** * **Trauma:** This is the most common indication for **emergency** splenectomy. It is indicated in Grade IV or V splenic injuries or when hemodynamic stability cannot be maintained via conservative management. * **ITP (Immune Thrombocytopenic Purpura):** Splenectomy is a classic **second-line** treatment for chronic ITP. The spleen is both the site of anti-platelet antibody production and the site of platelet destruction by macrophages. * **Hereditary Spherocytosis (HS):** This is the most common indication for **elective** splenectomy in hemolytic anemias. Removing the spleen prevents the premature destruction of the fragile, spherical RBCs, thereby curing the anemia and preventing gallstones. **Clinical Pearls for NEET-PG:** * **Most common indication for splenectomy:** Trauma (Overall); Hereditary Spherocytosis (Elective/Hematologic). * **Vaccination Protocol:** Post-splenectomy patients must be vaccinated against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) ideally **2 weeks before** elective surgery or **2 weeks after** emergency surgery. * **OPSI (Overwhelming Post-Splenectomy Infection):** The most common causative organism is *Streptococcus pneumoniae*. * **Peripheral Smear Findings:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies post-splenectomy.

Question 588: What is the best management for a contaminated wound with necrotic material?

A. Debridement (Correct Answer)
B. Tetanus toxoid
C. Gas gangrene serum
D. Broad spectrum antibiotics

Explanation: **Explanation:** The primary goal in managing a contaminated wound with necrotic material is to convert a "dirty" wound into a "clean" surgical wound. **Why Debridement is the Correct Answer:** Necrotic tissue acts as a culture medium for bacteria and prevents the formation of healthy granulation tissue. **Debridement** is the definitive surgical step that involves the removal of foreign bodies, devitalized tissue, and contaminants. By removing the nidus of infection and improving local blood supply, debridement reduces the bacterial load and creates an environment conducive to healing. In surgical principles, "source control" (debridement) always takes precedence over systemic therapy. **Analysis of Incorrect Options:** * **Tetanus Toxoid:** While essential for prophylaxis in contaminated wounds, it is an adjunct therapy. It prevents a specific complication (Tetanus) but does not address the existing infection or necrotic tissue. * **Gas Gangrene Serum:** This is largely of historical interest and is not used in modern standard management. Treatment for Clostridial infections is surgical debridement and high-dose Penicillin. * **Broad-spectrum Antibiotics:** Antibiotics are "adjuvants." They cannot penetrate necrotic, avascular tissue effectively. Without debridement, antibiotics alone will fail to clear the infection. **High-Yield Clinical Pearls for NEET-PG:** * **Golden Period:** Most traumatic wounds should be debrided and closed within 6 hours (the "Golden Period") to prevent established infection. * **Friedman’s Rule:** Debridement is the most important step in preventing gas gangrene. * **Wound Classification:** A wound with necrotic material is classified as a **Dirty/Infected wound** (Class IV), with an expected infection rate of >30% if not managed surgically.

Question 589: What is the surgical treatment for a parotid tumor involving the deep lobe?

A. Total parotidectomy with facial nerve preservation
B. Total parotidectomy with facial nerve sacrifice
C. Deep lobe parotidectomy with facial nerve preservation (Correct Answer)
D. Deep lobe parotidectomy with facial nerve sacrifice

Explanation: **Explanation:** The parotid gland is anatomically divided into a superficial and deep lobe by the plane of the **facial nerve (CN VII)**. When a tumor involves the deep lobe, the surgical objective is to remove the affected glandular tissue while meticulously protecting the facial nerve. **Why Option C is Correct:** The standard treatment for a deep lobe parotid tumor is a **deep lobe parotidectomy with facial nerve preservation**. This procedure involves identifying the facial nerve and its branches, gently retracting them (often after performing a superficial parotidectomy to gain access), and removing the tumor from the deep lobe. Unless the tumor is a high-grade malignancy with clinical evidence of nerve infiltration (e.g., facial palsy), the nerve is always preserved. **Analysis of Incorrect Options:** * **Option A:** Total parotidectomy involves removing both lobes. While often performed together to access the deep lobe, the specific treatment for a deep lobe tumor is the excision of that lobe. * **Options B & D:** Sacrifice of the facial nerve is **never** the primary intent unless there is preoperative facial paralysis or intraoperative evidence of direct nerve encasement by a malignant tumor. Most parotid tumors (even in the deep lobe) are benign (e.g., Pleomorphic Adenoma). **NEET-PG High-Yield Pearls:** * **Patey’s Operation:** Another name for Modified Radical Parotidectomy (removal of the gland with nerve preservation). * **Facial Nerve Landmark:** The **Tragal Pointer** is the most reliable clinical landmark to locate the facial nerve trunk during surgery. * **Most Common Tumor:** Pleomorphic Adenoma is the most common tumor in both the superficial and deep lobes. * **Dumbbell Tumor:** A classic presentation where a deep lobe tumor extends through the stylomandibular tunnel, appearing as a parapharyngeal mass.

Question 590: Which of the following is a cause of secondary hemorrhage?

A. Dislodgement of clot within 24 hours
B. Normalisation of blood pressure
C. Sloughing of the blood vessel wall (Correct Answer)
D. All of the above

Explanation: In surgery, hemorrhage is classified based on the timing of the bleed relative to the procedure. Understanding these distinctions is high-yield for NEET-PG. ### **Explanation of the Correct Answer** **Secondary Hemorrhage** occurs typically **7 to 14 days** after surgery. The underlying cause is almost always **infection**. Bacteria cause inflammation and suppuration, leading to the **sloughing of the blood vessel wall** or the breakdown of a suture line. Because it involves tissue necrosis, it is often a surgical emergency requiring antibiotics and proximal vessel ligation. ### **Analysis of Incorrect Options** * **A & B. Dislodgement of clot and Normalization of blood pressure:** These are the classic causes of **Reactionary Hemorrhage**. This occurs within **24 hours** (usually within 4–6 hours) of surgery. As the patient recovers from anesthesia and their blood pressure returns to normal (or "rebounds"), the increased pressure can dislodge a weak clot or "blow off" a ligature that was sufficient during the hypotensive state of surgery. * **D. All of the above:** This is incorrect because the mechanisms for reactionary and secondary hemorrhage are pathologically distinct. ### **High-Yield NEET-PG Pearls** * **Primary Hemorrhage:** Occurs at the time of injury or operation (e.g., inadequate ligation). * **Reactionary Hemorrhage:** Occurs within 24 hours. *Key trigger:* Rise in BP/Restlessness. * **Secondary Hemorrhage:** Occurs 7–14 days later. *Key trigger:* Infection/Sepsis. * **Management Tip:** For secondary hemorrhage in a limb, the treatment of choice is often ligation of the artery proximal to the infected site, as suturing the friable, infected vessel wall usually fails.

Practice by Chapter

Wound Healing and Care

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Surgical Infections

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Fluid and Electrolyte Management

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Nutrition in Surgical Patients

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Hemostasis and Blood Transfusion

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Surgical Instruments and Equipment

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Sutures and Stapling Devices

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Minimal Access Surgery Principles

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Surgical Complications

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Anesthesia Principles for Surgeons

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Surgical Oncology Principles

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Evidence-Based Surgery

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