General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 71: A patient presents to the clinic with severe pain in the right lower quadrant, anorexia, and vomiting. Which of the following is NOT a sign of appendicitis?

A. Rovsing's sign
B. Murphy's sign (Correct Answer)
C. Obturator sign
D. Psoas sign

Explanation: **Explanation:** The correct answer is **Murphy’s sign**, as it is the classic clinical indicator for **acute cholecystitis**, not appendicitis. It is elicited by asking the patient to take a deep breath while the clinician maintains pressure under the right costal margin; a positive sign is the sudden cessation of inspiration (catch) due to the inflamed gallbladder hitting the examiner's hand. **Analysis of Options:** * **Rovsing’s sign:** This is a classic sign of appendicitis where palpation of the **left** lower quadrant causes pain in the **right** lower quadrant. This occurs due to the displacement of gas and peritoneal irritation. * **Obturator sign:** This indicates an inflamed appendix located in the **pelvic position**. It is elicited by internal rotation of the flexed right hip, which causes pain due to irritation of the obturator internus muscle. * **Psoas sign:** This indicates a **retrocecal appendix**. It is elicited by extending the right hip while the patient lies on their left side; the inflamed appendix irritates the iliopsoas muscle, causing pain. **NEET-PG High-Yield Pearls:** * **McBurney’s Point:** The most common site of maximal tenderness, located 1/3rd of the distance from the ASIS to the umbilicus. * **Sherren’s Triangle:** Formed by the ASIS, pubic tubercle, and umbilicus; hyperesthesia in this area suggests appendicitis. * **Aure-Rozanova’s Sign:** Increased pain on percussion over the right Petit’s triangle (common in retrocecal appendicitis). * **Alvarado Score (MANTRELS):** A score of $\geq$ 7 is highly suggestive of acute appendicitis.

Question 72: Mid tracheostomy is performed over which of the following anatomical landmarks?

A. 1st and 2nd tracheal rings
B. 3rd and 4th tracheal rings (Correct Answer)
C. 5th and 6th tracheal rings
D. 7th and 8th tracheal rings

Explanation: **Explanation:** Tracheostomy is a life-saving surgical procedure where an opening is created in the anterior wall of the trachea. The classification of tracheostomy (High, Mid, or Low) is determined by its relationship to the **isthmus of the thyroid gland**, which typically overlies the 2nd, 3rd, and 4th tracheal rings. **1. Why Option B is Correct:** A **Mid Tracheostomy** is the most commonly performed elective procedure. It is performed at the level of the **3rd and 4th tracheal rings**. To access this site, the thyroid isthmus is either retracted upwards/downwards or divided and ligated. This level is preferred because it provides a stable airway while remaining far enough from the larynx to prevent long-term complications. **2. Analysis of Incorrect Options:** * **Option A (1st and 2nd rings):** This is a **High Tracheostomy**. It is generally avoided because proximity to the cricoid cartilage increases the risk of **perichondritis** and subsequent **subglottic stenosis**. * **Option C & D (5th ring and below):** These are **Low Tracheostomies**. They are technically difficult due to the increasing depth of the trachea as it follows the curvature of the spine. Furthermore, there is a high risk of injuring the **innominate artery** (brachiocephalic trunk) or causing a pneumothorax due to the high pleura. **Clinical Pearls for NEET-PG:** * **Emergency Airway:** In acute obstruction, **Cricothyroidotomy** is the procedure of choice (not tracheostomy). * **Most Common Complication:** Immediate (Hemorrhage); Late (Tracheal Stenosis). * **Bjork Flap:** An anteriorly based flap of the 3rd tracheal ring sewn to the skin to create a secure tract. * **Safe Zone:** The "Triangle of Safety" for tracheostomy is bounded by the sternocleidomastoid muscles laterally and the suprasternal notch inferiorly.

Question 73: Which of the following statements is not true of McBurney's incision?

A. Most suitable if the diagnosis of appendicitis is definite.
B. If it is converted into a muscle cutting incision it is called Rutherford Morison's incision.
C. Inguinal hernia is a sequel of the incision.
D. The incision can be extended upwards or downwards. (Correct Answer)

Explanation: ### Explanation **McBurney’s incision** (gridiron incision) is a muscle-splitting incision used primarily for appendicectomy. **1. Why Option D is the Correct Answer (The "Not True" Statement):** McBurney’s incision is a **muscle-splitting** incision where the fibers of the external oblique, internal oblique, and transversus abdominis are separated rather than cut. Because the fibers of these layers run in different directions, the incision is "self-closing" but **cannot be easily extended** upwards or downwards. If more exposure is required, it must be converted into a muscle-cutting incision (like Rutherford Morison) or a different approach must be used. **2. Analysis of Other Options:** * **Option A:** It is the classic approach for an appendicectomy when the diagnosis is certain. It provides direct access to the cecum and appendix. * **Option B:** If the gridiron incision is converted by cutting the internal oblique and transversus abdominis muscles laterally in the line of the skin incision, it becomes the **Rutherford Morison incision**, which provides better exposure for a retrocecal appendix or a difficult mobilization. * **Option C:** Damage to the **iliohypogastric or ilioinguinal nerves** during the incision can lead to paralysis of the conjoint tendon. This weakens the inguinal canal's posterior wall, making an **indirect inguinal hernia** a recognized late complication. ### High-Yield Clinical Pearls for NEET-PG: * **Lanz Incision:** A transverse skin incision in the right iliac fossa; it is cosmetically superior to McBurney’s as it follows Langer’s lines. * **Battle’s Incision:** A paramedian incision (rarely used now) that involves displacing the rectus muscle medially. * **Point of Incision:** McBurney’s point is located at the junction of the lateral one-third and medial two-thirds of a line joining the umbilicus to the Right Anterior Superior Iliac Spine (ASIS).

Question 74: Which of the following is NOT included in the Alvarado score for appendicitis?

A. Migratory right iliac fossa pain
B. Leukocytosis (Correct Answer)
C. Nausea
D. Elevated temperature

Explanation: The **Alvarado Score** (often remembered by the mnemonic **MANTRELS**) is a clinical scoring system used to diagnose acute appendicitis. The question asks which is NOT included; however, there is a nuance in how options are phrased in competitive exams like NEET-PG. **Explanation of the Correct Answer:** While **Leukocytosis** (increased WBC count) is indeed a component of the Alvarado score, it is often used as a "distractor" in questions where the options might include **"Shift to the left"** (increased neutrophils). In the context of this specific question format, if "Leukocytosis" is marked as the answer, it usually implies that the specific clinical sign or a different laboratory parameter is being tested, or there is a typo in the provided key. *Correction/Refinement:* In the standard MANTRELS scale, **Leukocytosis is included (2 points)**. If this were a "NOT" included question, a common incorrect option provided in exams is "Anorexia" vs "Nausea" (both are included) or "CRP levels" (not included). **Analysis of Options:** * **Migratory RIF pain (M):** 1 point. Classic history where pain starts periumbilical and shifts to the right iliac fossa. * **Nausea/Vomiting (N):** 1 point. A common constitutional symptom. * **Elevated Temperature (Fever) (E):** 1 point. Defined as >37.3°C. * **Leukocytosis (L):** 2 points. (Note: If the question intended to ask for something *not* included, options like "Rebound tenderness" (R) are included, while "Constipation" or "Diarrhea" are not). **High-Yield MANTRELS Mnemonic:** * **M** - Migratory RIF pain (1) * **A** - Anorexia (1) * **N** - Nausea/Vomiting (1) * **T** - Tenderness in RIF (2) * **R** - Rebound tenderness (1) * **E** - Elevated temperature (1) * **L** - Leukocytosis >10,000/mm³ (2) * **S** - Shift to the left (1) **Clinical Pearls for NEET-PG:** * **Max Score:** 10. A score of **≥7** is highly predictive of appendicitis. * **Modified Alvarado Score:** Removes the "Shift to the left" component (Total score 9). * **Most common sign:** RIF tenderness. * **Most common symptom:** Abdominal pain.

Question 75: What is the most commonly used suture material in oral surgical procedures?

A. Chromic gut
B. Polygalactin
C. Cotton
D. Black silk (Correct Answer)

Explanation: **Explanation:** The correct answer is **Black Silk**. In oral surgery, black silk remains the most commonly used suture material due to its superior handling characteristics, high knot security, and patient comfort. **Why Black Silk is the Correct Choice:** Black silk is a **non-absorbable, multifilament (braided)** suture. Its popularity in the oral cavity stems from its flexibility and "soft" feel, which prevents irritation to the sensitive oral mucosa and tongue. The braided nature provides excellent knot security, ensuring sutures do not come undone despite constant movement from speech and swallowing. Additionally, the black color provides high visibility against the pink oral tissues, making removal easy after 7–10 days. **Analysis of Incorrect Options:** * **Chromic Gut:** An absorbable suture derived from bovine/ovine submucosa. While used in oral surgery, it is less common because it loses tensile strength rapidly and can cause a significant inflammatory tissue reaction. * **Polygalactin (Vicryl):** A synthetic absorbable suture. While excellent for deep layers or patients who cannot return for suture removal, it is more expensive than silk and its "stiff" ends can prick the tongue, causing discomfort. * **Cotton:** Rarely used in modern surgery. It has low tensile strength and a high "wicking" effect, which can transport bacteria into the wound (capillarity), increasing the risk of infection. **High-Yield Clinical Pearls for NEET-PG:** * **Capillarity:** Braided sutures like silk exhibit high capillarity (wicking), which can harbor bacteria. This is why they are generally avoided in contaminated wounds but are acceptable in the highly vascular oral cavity. * **Gold Standard for Skin:** While silk is preferred for the **oral mucosa**, **Monofilament Nylon (Ethilon)** is the gold standard for **skin** closure to minimize scarring. * **Tensile Strength:** Silk is technically classified as "non-absorbable," but it actually undergoes slow proteolysis and loses most tensile strength within one year.

Question 76: What is the best treatment for a large cyst?

A. Enucleation
B. Marsupialisation
C. Marsupialisation followed by Enucleation (Correct Answer)
D. Enucleation followed by marsupialisation

Explanation: ### Explanation The management of a large cyst (such as an Odontogenic Keratocyst or a large Ranula) requires a balance between complete removal and the preservation of adjacent vital structures (nerves, vessels, or bone). **Why "Marsupialisation followed by Enucleation" is correct:** For a **large cyst**, immediate enucleation carries risks of pathological fracture, nerve damage, or incomplete removal due to the thin, fragile cyst wall. 1. **Marsupialisation (Partsch I):** This is the initial step where a window is created in the cyst wall, converting it into an open pouch. This relieves internal pressure, leading to a gradual reduction in the size of the cystic cavity as new bone forms at the periphery. 2. **Enucleation (Partsch II):** Once the cyst has shrunken significantly and the cyst wall has thickened, a secondary enucleation is performed. This "two-stage" approach ensures the cyst is removed entirely with minimal morbidity. **Analysis of Incorrect Options:** * **A. Enucleation:** While the treatment of choice for small cysts, performing this on a *large* cyst increases the risk of recurrence (due to wall fragmentation) and damage to surrounding structures. * **B. Marsupialisation:** Used alone, it requires a long healing period and carries a risk of the stoma closing prematurely. It also leaves the cystic lining behind, which may undergo neoplastic transformation. * **D. Enucleation followed by Marsupialisation:** This sequence is logically incorrect; you cannot create a pouch (marsupialise) after the entire lining has already been removed (enucleated). **Clinical Pearls for NEET-PG:** * **Marsupialisation** is preferred in children to prevent damage to permanent tooth buds. * **Carnoy’s Solution** is often used after enucleation of Odontogenic Keratocysts (OKC) to reduce recurrence by chemically cauterizing the daughter cysts. * **Gold Standard:** For most small-to-medium cysts, Enucleation with primary closure is the standard of care.

Question 77: What is true regarding a second-degree deep burn?

A. Blanches on pressure
B. Erythema
C. Dry white color (Correct Answer)
D. Painless

Explanation: **Explanation:** Burns are classified based on the depth of tissue involvement. A **second-degree deep partial-thickness burn** extends into the deeper layers of the dermis (reticular dermis), damaging hair follicles and sweat glands. **Why "Dry white color" is correct:** In deep second-degree burns, the damage to the dermal vasculature is significant. The destruction of the superficial capillary plexus leads to a lack of perfusion, resulting in a **waxy white or mottled appearance**. Unlike superficial burns, these are often **dry** because the sweat glands and sebaceous units are compromised. **Analysis of Incorrect Options:** * **A & B (Blanches on pressure / Erythema):** These are hallmarks of **First-degree** or **Superficial Second-degree** burns. In deep burns, the capillary refill is absent because the dermal vessels are thrombosed. * **D (Painless):** While deep second-degree burns have decreased sensation (hypoalgesia) due to damage to nerve endings, they are typically **painful to deep pressure**. A completely **painless** (anesthetic) wound is characteristic of a **Third-degree (Full-thickness)** burn. **NEET-PG High-Yield Pearls:** * **Superficial 2nd Degree:** Characterized by **blisters**, extreme pain, and brisk capillary refill. * **Deep 2nd Degree:** Characterized by a **cheesy white** appearance and takes >3 weeks to heal, often requiring skin grafting to prevent hypertrophic scarring. * **Jackson’s Burn Zones:** The **Zone of Stasis** is the critical area surrounding the central necrosis that can either recover or progress to deeper injury depending on resuscitation. * **Gold Standard for Depth:** Laser Doppler Imaging (LDI) is the most accurate tool to assess burn depth clinically.

Question 78: Which condition is characterized by 'Hippocrates facies'?

A. Peritonitis (Correct Answer)
B. Pancreatitis
C. Facial nerve injury
D. Marginal mandibular nerve injury

Explanation: **Explanation:** **Hippocrates facies** (or Hippocratic face) is a classic clinical sign described by Hippocrates, representing the characteristic facial appearance of a patient nearing death due to prolonged illness, severe dehydration, or **generalized peritonitis**. **1. Why Peritonitis is Correct:** In advanced peritonitis, the systemic inflammatory response leads to massive fluid shifts (third-spacing) and severe dehydration. The "Hippocratic facies" is characterized by sunken eyes, hollow temples, a pinched nose, cold/livid ears with distorted lobes, and dry, lead-colored skin. This appearance is a result of extreme exhaustion, dehydration, and impending multi-organ failure associated with late-stage intra-abdominal sepsis. **2. Why the Other Options are Incorrect:** * **Pancreatitis:** While severe pancreatitis can lead to shock and dehydration, it is more specifically associated with signs of retroperitoneal hemorrhage, such as **Cullen’s sign** (periumbilical ecchymosis) or **Grey Turner’s sign** (flank ecchymosis). * **Facial Nerve Injury:** This results in facial asymmetry, drooping of the corner of the mouth, and inability to close the eye (Bell's palsy), but does not produce the systemic "sunken" look of Hippocrates facies. * **Marginal Mandibular Nerve Injury:** This is a branch of the facial nerve often injured during submandibular surgery. It results in the paralysis of the muscles that depress the lower lip, causing an asymmetrical smile. **High-Yield Clinical Pearls for NEET-PG:** * **Hippocrates Facies:** Think "The Face of Impending Death" or "Advanced Peritonitis." * **Risus Sardonicus:** The "sardonic grin" seen in **Tetanus** due to masseter muscle spasms. * **Leonine Facies:** The "lion-like" face seen in **Lepromatous Leprosy**. * **Mask-like Facies:** Seen in **Parkinsonism**.

Question 79: A 60-year-old diabetic male presented with cough, sputum production, fever with chills, and rigor. A chest X-ray was performed. Which of the following is an indication for surgery?

A. Failure to respond to medical management
B. Suspected neoplasm
C. Hemorrhage
D. All of the above (Correct Answer)

Explanation: The clinical presentation of cough, fever with chills, and rigor in a diabetic patient, combined with the context of a chest X-ray, strongly suggests a **Lung Abscess** or a complicated necrotizing pneumonia. While the primary treatment for a lung abscess is medical (prolonged antibiotics and postural drainage), surgical intervention is required in approximately 10-15% of cases. ### **Explanation of Options:** * **A. Failure to respond to medical management:** This is the most common indication. If there is no clinical or radiological improvement after 4–6 weeks of appropriate antibiotic therapy, or if the cavity is >6 cm (giant abscess), surgery (lobectomy or percutaneous drainage) is indicated. * **B. Suspected neoplasm:** In an elderly patient (60 years), an abscess may develop distal to an obstructing bronchogenic carcinoma. If malignancy cannot be ruled out by imaging or bronchoscopy, surgical resection is mandatory for both diagnosis and treatment. * **C. Hemorrhage:** Massive hemoptysis (typically >600 ml/24 hours) caused by the erosion of a bronchial artery into the abscess cavity is a life-threatening emergency requiring immediate surgical intervention or bronchial artery embolization. * **D. All of the above:** Since all three scenarios represent standard surgical indications for lung abscess, this is the correct choice. ### **High-Yield Clinical Pearls for NEET-PG:** * **Primary Treatment:** Medical management (Antibiotics like Clindamycin or Beta-lactam/beta-lactamase inhibitors) is successful in 85-90% of cases. * **Other Indications for Surgery:** Bronchopleural fistula, tension pyopneumothorax, and fungal infections (e.g., Mycetoma). * **Common Organisms:** Anaerobes (most common), *Staphylococcus aureus*, and *Klebsiella pneumoniae* (especially in diabetics/alcoholics). * **Surgical Procedure of Choice:** **Lobectomy** is preferred over segmentectomy to ensure complete removal of the infected tissue.

Question 80: Which of the following statements regarding vacuum-assisted closure is FALSE?

A. Continuous negative pressure is applied. (Correct Answer)
B. It hastens the formation of granulation tissue.
C. It decreases edema.
D. It increases blood flow.

Explanation: **Explanation:** Vacuum-Assisted Closure (VAC), also known as Negative Pressure Wound Therapy (NPWT), is a sophisticated wound management technique. The key to answering this question lies in understanding the **mode of pressure application.** **Why Option A is the correct (False) statement:** While VAC can be applied continuously, the standard and most effective protocol for promoting tissue growth is **intermittent negative pressure** (typically 5 minutes 'on' and 2 minutes 'off'). Intermittent cycles are superior to continuous pressure because they prevent the adaptation of mechanoreceptors, thereby providing repeated stimulus for cellular proliferation and angiogenesis. **Analysis of other options (True statements):** * **Option B (Granulation Tissue):** VAC creates mechanical stress (macrostrain and microstrain) on the wound bed, which stimulates fibroblasts and increases the expression of growth factors, significantly hastening the formation of healthy granulation tissue. * **Option C (Decreases Edema):** The negative pressure actively removes excess interstitial fluid and exudate. This reduction in local edema improves lymphatic drainage and decreases the diffusion distance for nutrients and oxygen. * **Option D (Increases Blood Flow):** By removing third-space fluid and reducing interstitial pressure, VAC leads to capillary vasodilation and increased localized perfusion, which is essential for wound healing. **High-Yield Clinical Pearls for NEET-PG:** * **Pressure Range:** The standard negative pressure used is **-125 mmHg**. * **Contraindications:** Malignancy in the wound, untreated osteomyelitis, non-enteric/unexplored fistulas, and placement directly over exposed major blood vessels or nerves. * **Mechanism:** It works via **Microstrain** (cell-level deformation leading to proliferation) and **Macrostrain** (visible contraction of wound edges).

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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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