General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 641: Which scalpel blade is most commonly used for oral surgical procedures?

A. No. 22
B. No. 12
C. No. 11
D. No. 15 (Correct Answer)

Explanation: **Explanation:** The **No. 15 blade** is the most frequently used scalpel blade in oral and maxillofacial surgery. Its design features a small, curved cutting edge that allows for precise, short-stroke incisions. This is ideal for the delicate anatomy of the oral cavity, such as performing sulcular incisions, reflecting mucoperiosteal flaps, and excising small intraoral lesions. **Analysis of Options:** * **No. 15 (Correct):** The "workhorse" of oral surgery. Its small size provides excellent maneuverability in the restricted space of the mouth. * **No. 11:** A pointed, triangular blade used primarily for **stab incisions**. In oral surgery, it is used for Incision and Drainage (I&D) of abscesses or for precise vascular punctures, but not for general flap surgery. * **No. 12:** A hawk-bill or crescent-shaped blade with a cutting edge on the inside of the curve. It is specifically used for **mucogingival procedures** or incisions at the maxillary tuberosity/retromolar pad area where access is difficult. * **No. 22:** A large, curved blade used with a No. 4 handle. It is designed for **large skin incisions** (e.g., laparotomy) and is far too bulky for intraoral use. **High-Yield Clinical Pearls for NEET-PG:** * **Handles:** Blades No. 10, 11, 12, and 15 fit the **No. 3 handle** (standard for fine surgery). * **No. 15C:** A thinner, longer version of the No. 15 blade, often preferred for periodontal plastic surgery and micro-surgical procedures. * **Bard-Parker Handle:** The most common scalpel handle used in surgical practice.

Question 642: A specimen for a biopsy should be taken from which area?

A. Necrotic area
B. Subdermal layer
C. Border of an ulcerated area (Correct Answer)
D. Center of an ulcerated area

Explanation: The goal of a biopsy is to provide a representative sample of viable tissue that demonstrates the architecture of the pathology and its relationship with healthy tissue. **Why the "Border of an ulcerated area" is correct:** The periphery or the advancing edge of an ulcer is the most metabolically active site. It contains **viable proliferating cells** and, crucially, the **interface between the lesion and normal tissue**. This allows the pathologist to assess the degree of invasion (in malignancies) and the transition from healthy to diseased architecture, which is essential for an accurate histological diagnosis. **Analysis of Incorrect Options:** * **Necrotic area:** Necrosis represents cell death. Histologically, this appears as "amorphous debris" without nuclei, making it impossible to identify cellular morphology or mitotic activity. * **Subdermal layer:** While some deep-seated tumors require deep biopsies, a superficial biopsy of only the subdermal layer may miss the primary epithelial pathology of an ulcer. * **Center of an ulcerated area:** The center of a chronic ulcer is often composed of secondary changes such as inflammation, granulation tissue, or slough. These non-specific findings can mask the underlying diagnosis (e.g., a malignancy might be missed because the center is simply "infected"). **Clinical Pearls for NEET-PG:** * **Edge Biopsy:** Always include the margin of the lesion. * **Depth:** A biopsy must be deep enough to include the basement membrane to differentiate between *Carcinoma in situ* and *Invasive Carcinoma*. * **Punch Biopsy:** The gold standard for most skin lesions; it provides a cylindrical core of tissue including epidermis, dermis, and subcutaneous fat. * **Avoid Cautery:** Never use diathermy/cautery to take a biopsy specimen, as heat causes **"charring artifacts"** that distort cellular detail.

Question 643: During alloplastic temporomandibular joint (TMJ) reconstruction, what is the typical relationship between the artificial glenoid fossa and the artificial condyle?

A. The condyle is in a posterior position relative to the fossa. (Correct Answer)
B. The condyle is in an anterior position relative to the fossa.
C. The condyle is in a central position relative to the fossa.
D. None of the above.

Explanation: **Explanation:** In alloplastic temporomandibular joint (TMJ) reconstruction, the design of the prosthesis differs significantly from the natural anatomy. In a healthy biological joint, the condyle is ideally seated in a central or slightly anterior position within the glenoid fossa. However, in **total joint replacement (TJR)**, the artificial condyle is typically positioned **posteriorly** within the artificial glenoid fossa. **1. Why the Correct Answer is Right:** The primary reason for this posterior positioning is to mimic the **functional translation** and prevent mechanical impingement. Most modern TMJ prostheses (like the Biomet/Lorenz or TMJ Concepts systems) are "constrained" or "semi-constrained." By placing the condyle in a posterior position relative to the fossa component, the surgeon ensures maximum stability and allows for a greater range of rotational movement before the condyle reaches the anterior limit of the fossa during mouth opening. This positioning also accounts for the lack of a natural articular disc. **2. Why Incorrect Options are Wrong:** * **Option B (Anterior):** Placing the condyle anteriorly would severely limit the range of motion, as the condyle would immediately hit the anterior rim of the prosthesis upon opening, leading to mechanical obstruction. * **Option C (Central):** While a central position is the goal in natural dentition (Centric Relation), in alloplastic joints, it does not provide sufficient "runway" for the mechanical rotation required for functional clearance. **High-Yield Clinical Pearls for NEET-PG:** * **Indications for TMJ TJR:** Ankylosis, severe osteoarthritis, rheumatoid arthritis, and failed previous autogenous grafts. * **Material:** Usually a **Cobalt-Chromium-Molybdenum** condyle articulating with an **Ultra-High-Molecular-Weight Polyethylene (UHMWPE)** fossa. * **Nerve at Risk:** The **Facial Nerve (Marginal Mandibular and Temporal branches)** is the most common nerve at risk during the surgical approach (Pre-auricular and Submandibular/Risdon incisions).

Question 644: Which of the following is not a type of bariatric surgery?

A. Gastric banding
B. Gastric bypass
C. Biliopancreatic diversion
D. Ileal transposition (Correct Answer)

Explanation: **Explanation:** Bariatric surgery (weight-loss surgery) is primarily classified into three mechanisms: **Restrictive** (limiting food intake), **Malabsorptive** (reducing nutrient absorption), and **Combined** (both). **Why Ileal Transposition is the correct answer:** Ileal transposition is a **metabolic surgery**, not a bariatric surgery. It involves interposing a segment of the distal ileum into the proximal jejunum. While it shares some anatomical similarities with bariatric procedures, its primary goal is the treatment of **Type 2 Diabetes Mellitus** in non-obese or mildly obese patients by stimulating early GLP-1 secretion (the "ileal brake" mechanism). It is not primarily indicated for weight loss. **Analysis of Incorrect Options:** * **A. Gastric Banding:** A purely **restrictive** procedure where an adjustable silicone band is placed around the upper part of the stomach. * **B. Gastric Bypass (RYGB):** The "Gold Standard" bariatric procedure. It is a **combined** procedure (restrictive small pouch + malabsorptive bypass of the duodenum and proximal jejunum). * **C. Biliopancreatic Diversion (BPD):** A primarily **malabsorptive** procedure. It involves a subtotal gastrectomy and a long limb bypass, leading to significant weight loss but higher nutritional risks. **High-Yield Clinical Pearls for NEET-PG:** * **Most common bariatric procedure worldwide:** Sleeve Gastrectomy (Restrictive). * **Procedure with maximum weight loss:** Biliopancreatic Diversion (BPD). * **Dumping Syndrome:** A common complication of RYGB due to the loss of pyloric sphincter control. * **Ghrelin:** Levels decrease significantly after Sleeve Gastrectomy because the gastric fundus (the primary site of ghrelin production) is removed.

Question 645: Which of the following is not an indication for splenectomy?

A. Immune thrombocytopenic purpura (ITP)
B. Beta thalassemia
C. Sickle cell disease
D. All of the above (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. All of the above**, as none of these conditions are absolute indications for splenectomy in the modern era of medical management. Splenectomy is typically reserved for cases that are refractory to medical therapy or present with specific complications. 1. **Immune Thrombocytopenic Purpura (ITP):** Splenectomy is no longer a first-line treatment. It is indicated only if the patient fails medical management (Corticosteroids, IVIG, or Rituximab) or has life-threatening bleeding. 2. **Beta Thalassemia:** Splenectomy is indicated only in cases of **Thalassemia Intermedia** or **Major** when there is massive splenomegaly causing mechanical discomfort, symptomatic hypersplenism (worsening anemia/leukopenia), or when transfusion requirements exceed 200-250 ml/kg/year. 3. **Sickle Cell Disease:** Splenectomy is rarely indicated because most patients undergo **"autosplenectomy"** (splenic infarction) by childhood. It is only considered in specific emergencies like **Splenic Sequestration Crisis** or a splenic abscess. **Clinical Pearls for NEET-PG:** * **Most common indication for elective splenectomy:** ITP. * **Most common indication for emergency splenectomy:** Trauma (Splenic rupture). * **Vaccination Protocol:** To prevent **OPSI (Overwhelming Post-Splenectomy Infection)**, patients must be vaccinated against *H. influenzae*, *N. meningitidis*, and *S. pneumoniae* at least **2 weeks before** elective surgery or **2 weeks after** emergency surgery. * **Peripheral Smear Findings:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies post-splenectomy.

Question 646: What is the recommended distance from the olecranon for amputation?

A. 5-10 cm
B. 10-25 cm
C. 15-20 cm (Correct Answer)
D. 20-30 cm

Explanation: **Explanation:** In upper limb amputations, the primary goal is to preserve as much functional length as possible while ensuring adequate soft tissue coverage for a prosthetic interface. For a **Below-Elbow (Trans-radial) Amputation**, the ideal level is at the junction of the middle and distal thirds of the forearm. **Why 15-20 cm is correct:** The standard recommendation for an ideal stump length is **15 to 20 cm (approximately 7-8 inches)** measured from the tip of the olecranon. This length is considered "ideal" because: 1. It provides a long enough lever arm for efficient prosthetic control. 2. It preserves the pronation and supination movements of the forearm. 3. It allows sufficient space for the installation of modern prosthetic wrist units and components. **Analysis of Incorrect Options:** * **A (5-10 cm):** This is considered a "short" below-elbow stump. While a minimum of 5 cm of intact ulna is required to maintain elbow flexion, such a short stump offers poor leverage and often requires specialized "split-socket" prostheses. * **B (10-25 cm) & D (20-30 cm):** These ranges are either too broad or too long. Amputations in the distal-most part of the forearm (near the wrist) are generally avoided because the skin is thin, poorly vascularized, and lacks the muscle bulk needed to cushion a prosthesis comfortably. **High-Yield Clinical Pearls for NEET-PG:** * **Minimum Length:** At least **5 cm** of the ulna is necessary to preserve elbow function. * **Krukenberg Procedure:** A surgical technique where the radius and ulna are separated to create a "pincer" (sensate) grip; it is specifically indicated for **bilateral blind amputees**. * **Above-Elbow (Trans-humeral) Amputation:** The ideal length is **20 cm** from the acromion process. * **Rule of Thumb:** In all amputations, "Save every possible centimeter of length," but avoid the distal 1/3rd of the forearm due to poor circulation and padding.

Question 647: What is the most common site for a lung abscess?

A. Posterior segment of the right upper lobe (Correct Answer)
B. Lingula
C. Posterior segment of the left lower lobe
D. Posterior segment of the right lower lobe

Explanation: **Explanation:** The development of a lung abscess is most commonly a result of **aspiration of oropharyngeal contents**. The specific site of the abscess is determined by the patient's posture at the time of aspiration and the anatomical structure of the tracheobronchial tree. **Why Option A is correct:** The **right lung** is more commonly affected because the right main bronchus is wider, shorter, and more vertical than the left. When a patient is in a **supine (lying down) position**—which is common during sleep, anesthesia, or unconsciousness—gravity directs aspirated material into the most dependent segments. In the supine position, these are the **posterior segment of the right upper lobe** and the **superior segment of the right lower lobe**. Statistically, the posterior segment of the right upper lobe is the most frequent site. **Why the other options are incorrect:** * **B (Lingula):** This is part of the left upper lobe. Its anatomy does not favor gravity-dependent aspiration in common positions. * **C (Posterior segment of the left lower lobe):** While the lower lobes are common sites for aspiration when a patient is **upright**, the left side is less frequently involved than the right due to the more acute angle of the left main bronchus. * **D (Posterior segment of the right lower lobe):** While the *superior* segment of the right lower lobe is a very common site, the *posterior* segment of the lower lobe is less commonly involved than the upper lobe's posterior segment in supine aspiration. **High-Yield Clinical Pearls for NEET-PG:** * **Most common overall site:** Posterior segment of the Right Upper Lobe. * **Most common site if upright:** Basal segments of the Right Lower Lobe. * **Most common site if lying on the right side:** Posterior segment of the Right Upper Lobe. * **Microbiology:** Usually polymicrobial, dominated by **anaerobes** (e.g., *Bacteroides*, *Fusobacterium*). * **Clinical sign:** Foul-smelling sputum is a classic indicator of anaerobic infection.

Question 648: Acrylic splints are desirable during the post-operative phase of management in which of the following procedures?

A. Mandibular alveoloplasty
B. Torus palatinus reduction (Correct Answer)
C. Mental tubercle reduction
D. Excision of Labial epulis fissuratum

Explanation: **Explanation:** The correct answer is **B. Torus palatinus reduction.** **Why Torus Palatinus Reduction is Correct:** A torus palatinus is a benign bony overgrowth (exostosis) located at the midline of the hard palate. Surgical reduction involves reflecting a thin mucoperiosteal flap and grinding down the bone. Post-operatively, this area is highly susceptible to the formation of a **hematoma** between the thin palatal mucosa and the underlying bone. Because the palatal tissue is fragile and lacks a robust blood supply, a hematoma can lead to tissue necrosis or infection. An **acrylic splint** (or a surgical stent) is used to: 1. Apply constant pressure to the surgical site, preventing hematoma and edema. 2. Protect the thin, sutured flap from trauma during speech and mastication. 3. Support the flap against the bone to facilitate primary healing. **Why Other Options are Incorrect:** * **Mandibular alveoloplasty:** This involves recontouring the alveolar ridge. While pressure is important, standard suturing and the natural anatomy of the mandible usually suffice without a rigid acrylic splint. * **Mental tubercle reduction:** This is an extra-oral or intra-oral procedure on the chin. It typically requires a pressure dressing (tape/bandage) rather than an intra-oral acrylic splint. * **Excision of Labial epulis fissuratum:** This involves removing redundant soft tissue caused by ill-fitting dentures. Healing occurs via secondary epithelialization or primary closure; the patient’s existing (modified) denture often acts as a guide, but a specific acrylic splint is not a standard requirement for the procedure itself. **High-Yield Clinical Pearls for NEET-PG:** * **Torus Palatinus:** Most common in females (2:1 ratio) and usually appears in the 2nd or 3rd decade of life. * **Indications for surgery:** Interference with denture stability, recurrent mucosal trauma, or speech impairment. * **Complication:** The most serious immediate complication of torus removal is **perforation of the nasal floor** or the formation of an oronasal fistula.

Question 649: As per EHS classification, what is the designation for a primary, direct inguinal hernia with a 4 cm width?

A. PD4
B. PM4
C. PD3
D. PM3 (Correct Answer)

Explanation: The **European Hernia Society (EHS)** classification is a standardized clinical tool used to describe groin hernias based on three parameters: type, location, and size. ### **Explanation of the Correct Answer (D)** The EHS classification uses a simple grid system: 1. **Type:** **P** stands for Primary hernia; **R** stands for Recurrent. 2. **Location:** **M** stands for Medial (Direct); **L** stands for Lateral (Indirect); **F** stands for Femoral. 3. **Size:** Measured at the internal ring or defect: * **1:** < 1.5 cm (one index finger width) * **2:** 1.5 – 3 cm (two finger widths) * **3:** > 3 cm (three finger widths) In this case, the hernia is **Primary (P)**, **Direct (Medial/M)**, and the width is **4 cm (> 3 cm)**, which corresponds to **3**. Therefore, the designation is **PM3**. ### **Analysis of Incorrect Options** * **A (PD4) & B (PM4):** These are incorrect because the EHS size scale only goes from **1 to 3**. There is no "4" in the classification. * **C (PD3):** The letter **"D"** is not used in the EHS classification for location. Direct hernias are designated as **"M"** (Medial to the inferior epigastric vessels). ### **High-Yield Clinical Pearls for NEET-PG** * **Reference Point:** The classification is based on the position relative to the **inferior epigastric vessels**. * **Combined Hernias:** If both a direct and indirect hernia are present (Pantaloon hernia), it is recorded by marking both boxes (e.g., PL2 and PM2). * **Standardization:** The EHS classification was developed to replace the more complex Nyhus classification for easier use in clinical trials and registries. * **Size Estimation:** Intraoperatively, the size is often estimated using the width of the surgeon's index finger (~1.5–2 cm).

Question 650: A 36-year-old male presents with a swelling in the submandibular region. He experiences elevated tongue and dysphagia, accompanied by high fever. Intraoral examination reveals a grossly destructed lower first molar. What is the primary surgical line of treatment?

A. Extraction of the involved tooth
B. Incision and drainage
C. Placement of a drain
D. All of the above (Correct Answer)

Explanation: ### Explanation **Clinical Diagnosis: Ludwig’s Angina** The clinical presentation of submandibular swelling, elevated tongue (due to displacement of the floor of the mouth), dysphagia, and high fever following a dental infection is classic for **Ludwig’s Angina**. This is a rapidly spreading cellulitis involving the submandibular, sublingual, and submental spaces bilaterally. **Why "All of the Above" is Correct:** The management of Ludwig’s Angina follows a multi-pronged surgical approach once the airway is secured: 1. **Incision and Drainage (B):** A wide transverse incision is made to decompress the tension in the fascial spaces, even if no frank pus is felt (as it is primarily a cellulitis). 2. **Placement of a Drain (C):** Corrugated rubber drains or Penrose drains are essential to ensure continued decompression and drainage of inflammatory exudate. 3. **Extraction of the involved tooth (A):** Since the source of infection is the carious lower molar (odontogenic origin), the "focal point" must be removed to prevent recurrence. **Analysis of Options:** While each individual step (A, B, or C) is a component of the treatment, choosing only one would result in incomplete management. In a surgical emergency like Ludwig’s Angina, the **source control** (extraction) must be combined with **decompression** (I&D) and **maintenance of drainage** (drain placement) to prevent life-threatening airway obstruction. **NEET-PG High-Yield Pearls:** * **Most common cause:** Odontogenic infection (usually 2nd or 3rd lower molars). * **Primary threat:** Airway obstruction (asphyxia) due to posterior displacement of the tongue. * **Microbiology:** Usually polymicrobial (Streptococci, Staphylococci, and anaerobes). * **Management Priority:** 1. Airway maintenance (Tracheostomy if needed) → 2. IV Antibiotics → 3. Surgical Decompression. * **Key Sign:** "Woody" or "brawny" edema of the neck; absence of lymphadenopathy.

Practice by Chapter

Wound Healing and Care

Practice Questions

Surgical Infections

Practice Questions

Fluid and Electrolyte Management

Practice Questions

Nutrition in Surgical Patients

Practice Questions

Hemostasis and Blood Transfusion

Practice Questions

Surgical Instruments and Equipment

Practice Questions

Sutures and Stapling Devices

Practice Questions

Minimal Access Surgery Principles

Practice Questions

Surgical Complications

Practice Questions

Anesthesia Principles for Surgeons

Practice Questions

Surgical Oncology Principles

Practice Questions

Evidence-Based Surgery

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free