General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 431: Which of the following statements regarding hypertrophic scars is TRUE?

A. They grow beyond the wound margin.
B. They are more common in females.
C. They are not familial. (Correct Answer)
D. They rarely subside.

Explanation: ### Explanation Hypertrophic scars and keloids are common topics in NEET-PG, and distinguishing between them is crucial for clinical practice and exams. **Why Option C is Correct:** Hypertrophic scars are primarily a result of local wound factors (such as tension, infection, or delayed healing) rather than a genetic predisposition. Unlike keloids, which have a strong genetic link and are often **familial**, hypertrophic scars occur sporadically in any individual if the wound environment is suboptimal. **Analysis of Incorrect Options:** * **Option A:** Hypertrophic scars stay **within the margins** of the original wound. It is the keloid that characteristically grows beyond the wound margins into surrounding healthy tissue. * **Option B:** There is **no gender predilection** for hypertrophic scars; they affect males and females equally. * **Option D:** Hypertrophic scars are often transient. They typically undergo a "maturation phase" where they **spontaneously subside** or flatten over 6 to 18 months. In contrast, keloids rarely regress and often recur after excision. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Hypertrophic scars often occur across **flexor surfaces** (joints) due to tension; Keloids are most common on the **presternal area, earlobes, and deltoid**. * **Onset:** Hypertrophic scars appear early (within 4 weeks); Keloids can appear months or even years after the injury. * **Histology:** Hypertrophic scars contain organized **parallel collagen bundles**; Keloids contain thick, disorganized **"glassy" collagen (Type I and III)**. * **Treatment:** First-line treatment for both includes pressure therapy and silicone gel sheets. Intralesional steroids (Triamcinolone) are highly effective for symptomatic relief.

Question 432: In a multilayered wound, the deep layer is sutured by chromic gut. This is done because chromic gut sutures have:

A. Increased strength
B. Increased ease of use
C. Delayed resorption (Correct Answer)
D. Less tissue irritation

Explanation: **Explanation:** The correct answer is **C. Delayed resorption.** **Medical Concept:** Chromic gut is a natural absorbable suture derived from the submucosa of sheep intestine or serosa of bovine intestine. Plain catgut is absorbed rapidly (7–10 days) due to proteolytic enzymatic digestion. To improve its clinical utility, the gut is treated with **chromium salts (chromic acid)**. This treatment causes cross-linking of collagen fibers, which makes the suture more resistant to enzymatic degradation. Consequently, chromic gut maintains its tensile strength for a longer period (14–21 days) and takes longer to be completely resorbed (up to 90 days) compared to plain gut. In multilayered closures, the deep layers require prolonged support to prevent dehiscence while the tissue heals. **Analysis of Incorrect Options:** * **A. Increased strength:** While chromic treatment preserves strength for a longer duration, it does not significantly increase the initial knot-pull strength compared to plain gut of the same gauge. * **B. Increased ease of use:** Chromic gut is often stiffer and has more "memory" than plain gut, making it slightly more difficult to handle and knot securely. * **D. Less tissue irritation:** Being a foreign animal protein, chromic gut actually causes a **marked inflammatory tissue reaction**. Synthetic absorbable sutures (like Vicryl) are preferred when minimal irritation is required. **High-Yield NEET-PG Pearls:** * **Mechanism of Absorption:** Natural sutures (Gut) are absorbed by **proteolysis/enzymatic digestion**, whereas synthetic sutures (Vicryl, PDS) are absorbed by **hydrolysis**. * **Contraindication:** Never use chromic gut in infected tissues or the biliary/urinary tracts, as it can act as a nidus for stone formation or degrade prematurely. * **Fastest absorbing suture:** Plain catgut. * **Longest strength retention (Absorbable):** PDS (Polydioxanone).

Question 433: In a splenectomized patient, which of the following organisms is least likely to cause infection?

A. Pneumococci
B. Klebsiella
C. H. influenzae
D. Staph. aureus (Correct Answer)

Explanation: **Explanation:** The spleen plays a critical role in the body’s immune defense, specifically through the filtration of blood and the production of antibodies (IgM) by splenic B-cells. Its most vital function in this context is the clearance of **encapsulated bacteria** via opsonization. **Why Staph. aureus is the correct answer:** *Staphylococcus aureus* is a Gram-positive coccus that is **not** typically encapsulated in the clinical sense that requires splenic clearance. The risk of Overwhelming Post-Splenectomy Infection (OPSI) is primarily associated with organisms that possess a polysaccharide capsule. Since the spleen is the primary site for the destruction of these opsonized encapsulated organisms, its absence does not significantly predispose a patient to *Staph. aureus* infections compared to the general population. **Why the other options are incorrect:** * **A, B, and C (Pneumococci, Klebsiella, H. influenzae):** These are all **encapsulated organisms**. * *Streptococcus pneumoniae* (Pneumococcus) is the most common cause of OPSI (50-90% of cases). * *Haemophilus influenzae* type b and *Neisseria meningitidis* are the other two "classic" encapsulated pathogens. * *Klebsiella pneumoniae* is also an encapsulated Gram-negative rod that poses an increased risk in asplenic individuals. **High-Yield Clinical Pearls for NEET-PG:** * **OPSI (Overwhelming Post-Splenectomy Infection):** Characterized by a prodrome of fever and malaise, rapidly progressing to septic shock and DIC. * **Most Common Organism:** *Streptococcus pneumoniae*. * **Vaccination Protocol:** Patients should ideally be vaccinated **2 weeks before** elective splenectomy or **2 weeks after** emergency splenectomy. * **Essential Vaccines:** Pneumococcal, Meningococcal, and *H. influenzae* type b (Hib). * **Peripheral Smear Findings:** Look for **Howell-Jolly bodies** (nuclear remnants), Pappenheimer bodies, and Heinz bodies.

Question 434: Which hernia often simulates a peptic ulcer?

A. Umbilical hernia
B. Fatty hernia of the linea alba (Correct Answer)
C. Incisional hernia
D. Inguinal hernia

Explanation: ### Explanation **Fatty hernia of the linea alba**, also known as an **Epigastric hernia**, occurs through a defect in the linea alba between the xiphoid process and the umbilicus. **Why it is the correct answer:** The primary reason this hernia simulates a peptic ulcer is its location and the nature of its contents. It usually consists of extraperitoneal fat protruding through the decussating fibers of the linea alba. This fat can become incarcerated or strangulated, leading to localized epigastric pain, tenderness, and nausea. Because the pain is referred to the epigastrium and may be aggravated by physical exertion or after meals (due to abdominal wall tension), it mimics the symptomatic presentation of **Peptic Ulcer Disease (PUD)** or gallbladder disease. **Analysis of Incorrect Options:** * **Umbilical hernia:** Occurs at the umbilicus. While it can cause localized pain, it is too low to be confused with the typical retrosternal or epigastric pain of a peptic ulcer. * **Incisional hernia:** Occurs at the site of a previous surgical scar. The diagnosis is usually obvious based on surgical history and physical examination. * **Inguinal hernia:** Occurs in the groin. The anatomical distance from the stomach makes it impossible to simulate peptic ulcer symptoms. **NEET-PG Clinical Pearls:** * **The "Great Mimicker":** Epigastric hernias are often small and may not be visible in obese patients; they are better felt than seen. * **Clinical Test:** Pain is often elicited when the patient tenses the abdominal muscles (e.g., performing a straight leg raise or a partial sit-up). * **Surgical Note:** These hernias rarely contain a peritoneal sac or bowel; they are predominantly composed of extraperitoneal fat. * **Differential Diagnosis:** Always consider epigastric hernia in a patient with "atypical dyspepsia" whose endoscopy for PUD is normal.

Question 435: Which type of ulcer is likely to develop in a long-standing chronic venous ulcer?

A. Marjolin ulcer (Correct Answer)
B. Aphthous ulcer
C. Bazin ulcer
D. Aerial ulcer

Explanation: ### Explanation **Correct Answer: A. Marjolin ulcer** A **Marjolin ulcer** refers to a squamous cell carcinoma (SCC) that arises in areas of chronic inflammation, long-standing scars, or non-healing wounds. The most common precursors are **chronic venous stasis ulcers**, old burn scars (cicatrix), and chronic osteomyelitis sinuses. The underlying pathophysiology involves constant cellular turnover and chronic irritation, which eventually leads to malignant transformation. These ulcers are typically painless (as they destroy local sensory nerves) but are characterized by everted edges and a foul-smelling discharge. **Why the other options are incorrect:** * **B. Aphthous ulcer:** These are small, painful, shallow ulcers found on the mucous membranes of the mouth (canker sores). They are not associated with chronic venous disease or malignancy. * **C. Bazin ulcer (Erythema Induratum):** This is a form of panniculitis (inflammation of subcutaneous fat) associated with Tuberculosis. It typically presents as tender, nodules on the calves of young women that may ulcerate. * **D. Aerial ulcer:** This is not a standard medical term for a specific type of chronic or malignant ulcer. **High-Yield Clinical Pearls for NEET-PG:** * **Most common histological type:** Squamous Cell Carcinoma (SCC) is the most frequent, though Basal Cell Carcinoma (BCC) can rarely occur. * **Characteristic Feature:** Marjolin ulcers are generally **more aggressive** and have a higher rate of metastasis compared to primary SCC of the skin. * **Diagnosis:** Any chronic ulcer showing sudden growth, everted edges, or bleeding should undergo an **edge biopsy** to rule out malignancy. * **Latency:** The average time for malignant transformation is 25–30 years.

Question 436: The surgeon whose name is immortalized by his work on the radical cure of hernia was -

A. William Halsted
B. Eduardo Bassini (Correct Answer)
C. Mc Vay
D. Koontz

Explanation: **Explanation:** The correct answer is **Eduardo Bassini**. He is widely regarded as the "Father of Modern Hernia Surgery." In 1884, Bassini revolutionized the treatment of inguinal hernias by introducing the **Bassini Repair**. This was the first "physiologic" repair that restored the integrity of the posterior wall of the inguinal canal by suturing the triple layer (conjoint tendon) to the inguinal ligament. Before Bassini, hernia surgery had dismal success rates; his technique reduced recurrence rates from nearly 100% to less than 10%, immortalizing his name in surgical history. **Analysis of Incorrect Options:** * **William Halsted:** A pioneer of modern surgery known for "Halsted’s Principles" of wound healing and the Radical Mastectomy. While he modified hernia repairs (Halsted I & II), he is not the primary figure associated with the "radical cure." * **McVay:** Known for the **Cooper’s Ligament Repair**. This technique involves suturing the conjoint tendon to Cooper’s ligament and is specifically indicated for femoral hernia repair. * **Koontz:** Associated with the use of prosthetic materials (tantalum mesh) in the early era of hernia repair, but he did not develop the foundational radical cure. **High-Yield Clinical Pearls for NEET-PG:** * **Bassini Repair:** Suture of conjoint tendon to the **inguinal ligament**. * **McVay Repair:** Suture of conjoint tendon to **Cooper’s ligament** (Pectineal ligament). * **Shouldice Repair:** The current "Gold Standard" for non-mesh (tissue-based) repair; involves a four-layer imbrication of the transversalis fascia. * **Lichtenstein Repair:** The modern "Gold Standard" overall; it is a **tension-free** repair using polypropylene mesh.

Question 437: Splenectomy is indicated in:

A. Sickle cell anaemia
B. Hereditary spherocytosis (Correct Answer)
C. Haemoglobin C disease
D. Hodgkin's lymphoma

Explanation: **Explanation:** **Hereditary Spherocytosis (HS)** is the correct answer because it is the most common hemolytic anemia for which splenectomy is indicated. In HS, a defect in red blood cell (RBC) membrane proteins (like spectrin or ankyrin) results in spherical, rigid cells. These spherocytes are prematurely trapped and destroyed by splenic macrophages in the cords of Billroth. Splenectomy does not cure the membrane defect but significantly increases RBC lifespan, effectively resolving the anemia and preventing complications like pigment gallstones. **Why other options are incorrect:** * **Sickle Cell Anemia:** Splenectomy is rarely indicated because these patients undergo "autosplenectomy" due to repeated infarctions by early childhood. Surgery is only considered for specific complications like acute splenic sequestration or a rare splenic abscess. * **Haemoglobin C Disease:** This usually presents as a mild hemolytic anemia that rarely requires surgical intervention. * **Hodgkin’s Lymphoma:** Historically, "staging laparotomy" with splenectomy was common. However, with modern PET-CT imaging and advanced chemotherapy protocols, splenectomy is no longer a standard part of management. **Clinical Pearls for NEET-PG:** * **Timing:** In HS, splenectomy is ideally deferred until age 5–6 to reduce the risk of Overwhelming Post-Splenectomy Infection (OPSI). * **Vaccination:** Patients must receive vaccinations against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) at least 2 weeks before elective surgery. * **Peripheral Smear:** Post-splenectomy, look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies. * **Concomitant Procedure:** Always screen for gallstones in HS patients; if present, a cholecystectomy should be performed during the same session.

Question 438: Abbe estlander flap is used for?

A. Lip (Correct Answer)
B. Nose
C. Ears
D. Eyelid

Explanation: The **Abbe-Estlander flap** is a classic reconstructive technique in plastic surgery, specifically designed for **lip reconstruction**. ### **Explanation of the Correct Answer** The Abbe-Estlander flap is a **cross-lip arterialized pedicled flap**. It involves transferring a full-thickness segment of one lip (usually the lower) to fill a defect in the other lip (usually the upper). * **The Abbe Flap:** Used for central defects of the upper or lower lip that do not involve the oral commissure (corner of the mouth). It requires a second stage to divide the pedicle after 2–3 weeks. * **The Estlander Flap:** A variation used specifically for defects involving the **oral commissure**. Unlike the Abbe flap, it is typically a one-stage procedure but results in a rounded corner of the mouth. ### **Why Other Options are Incorrect** * **Nose:** Nasal reconstruction typically utilizes the **Forehead flap** (paramedian forehead flap) or the **Nasolabial flap**. * **Ears:** Ear reconstruction often involves **costal cartilage grafts** or local skin flaps like the **Nagata or Brent technique**. * **Eyelid:** Eyelid defects are managed using techniques like the **Hughes tarsoconjunctival flap** (for lower lid) or the **Cutler-Beard flap** (for upper lid). ### **High-Yield Clinical Pearls for NEET-PG** * **Blood Supply:** The flap is based on the **Labial artery** (a branch of the Facial artery), which runs between the oral mucosa and the orbicularis oris muscle. * **Rule of Thirds:** Primary closure is preferred for lip defects <1/3 of the length. For defects **1/3 to 2/3** of the lip, the Abbe-Estlander flap is the gold standard. * **Karapandzic Flap:** Another high-yield lip reconstruction term; it is a semi-circular rotation-advancement flap that preserves nerve and blood supply.

Question 439: What is the treatment for a recurrent ranula?

A. Incision
B. Excision
C. Excision with adjacent glands (Correct Answer)
D. Marsupialization

Explanation: **Explanation:** A **ranula** is a mucus extravasation cyst occurring in the floor of the mouth, typically arising from the **sublingual salivary gland**. Understanding the pathophysiology is key: the cyst is not a true cyst (it lacks an epithelial lining) but a collection of saliva leaked from a ruptured duct. **Why Option C is Correct:** The definitive treatment for a recurrent ranula is the **excision of the cyst along with the offending sublingual salivary gland**. Since the gland is the source of the leaked mucus, leaving it in situ leads to a high risk of recurrence. Removing the "adjacent glands" (specifically the sublingual gland) addresses the root cause and prevents further extravasation. **Why Other Options are Incorrect:** * **Incision (A):** Simply cutting the cyst provides only temporary drainage; the fluid will re-accumulate almost immediately once the incision heals. * **Excision (B):** Removing only the pseudocyst wall without removing the sublingual gland results in a high recurrence rate (approx. 25% or more), as the secretory source remains. * **Marsupialization (D):** This involves opening the cyst and suturing the edges to the oral mucosa. While it is a common primary treatment for simple ranulas, it has a high failure rate for recurrent or plunging ranulas. **NEET-PG High-Yield Pearls:** * **Plunging Ranula:** A clinical variant that herniates through the **mylohyoid muscle** into the submandibular space, presenting as a neck swelling. * **Treatment of Plunging Ranula:** Requires excision of the sublingual gland via an intraoral approach, often combined with drainage of the cervical collection. * **Differential Diagnosis:** Always differentiate from a dermoid cyst (which is midline and has a "doughy" consistency). * **Nerve at Risk:** During excision, the **lingual nerve** (which loops under the submandibular duct) is the structure most at risk of injury.

Question 440: Diaphragmatic hernia most commonly occurs through which anatomical defect?

A. Morgagni
B. Bochdaiek (Correct Answer)
C. Hiatal
D. None of the above

Explanation: **Explanation:** Congenital Diaphragmatic Hernia (CDH) is a critical surgical emergency in neonates. The correct answer is **Bochdalek hernia**, which accounts for approximately **85-90%** of all congenital diaphragmatic cases. **1. Why Bochdalek is Correct:** A Bochdalek hernia occurs due to the failure of the **pleuroperitoneal canal** to close during embryonic development (usually by the 8th-10th week). It is located **posterolaterally**, most commonly on the **left side** (80-85%) because the liver provides a protective barrier on the right. This defect allows abdominal viscera to herniate into the thorax, leading to pulmonary hypoplasia and persistent fetal circulation. **2. Why Other Options are Incorrect:** * **Morgagni Hernia:** This is an anterior defect occurring through the **foramen of Morgagni** (sternocostal triangle). It is much rarer (approx. 2-5% of cases), usually occurs on the right side, and is often asymptomatic until later in life. * **Hiatal Hernia:** This involves the protrusion of the stomach through the esophageal hiatus of the diaphragm. While common in adults, it is an acquired or sliding defect rather than the primary anatomical defect associated with the classic "Congenital Diaphragmatic Hernia" discussed in pediatric surgery. **3. High-Yield Clinical Pearls for NEET-PG:** * **Triad of CDH:** Dyspnea, Cyanosis, and Dextrocardia (due to mediastinal shift). * **Physical Exam:** Scaphoid abdomen and bowel sounds heard in the chest. * **Radiology:** "Bowel loops in the hemithorax" on X-ray. * **Management Tip:** Never use bag-and-mask ventilation (it distends the herniated bowel, further compressing the lungs). Immediate **endotracheal intubation** is the gold standard. * **Prognostic Factor:** The degree of pulmonary hypoplasia and pulmonary hypertension determines survival, not the surgery itself.

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

Practice Questions

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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