General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 701: Which of the following clinical signs is NOT associated with acute appendicitis?

A. Pointing sign
B. Rovsing's sign
C. Cullen's sign (Correct Answer)
D. Obturator sign

Explanation: **Explanation:** The correct answer is **Cullen’s sign**, as it is a clinical marker for **retroperitoneal hemorrhage**, most commonly associated with **acute pancreatitis** or a ruptured ectopic pregnancy, rather than acute appendicitis. **1. Why Cullen’s sign is the correct answer:** Cullen’s sign is characterized by periumbilical ecchymosis (bluish discoloration). It occurs when blood tracks from the retroperitoneum to the periumbilical subcutaneous fat via the falciform ligament. It is a sign of severe, often necrotizing, pancreatitis. **2. Analysis of incorrect options (Signs of Appendicitis):** * **Pointing sign:** The patient is asked to point to where the pain began (periumbilical) and where it moved to (Right Iliac Fossa). This shift reflects the progression from visceral to somatic pain. * **Rovsing's sign:** Deep palpation of the Left Iliac Fossa causes pain in the Right Iliac Fossa. This occurs due to the displacement of gas and the stretching of the peritoneum over the inflamed appendix. * **Obturator sign:** Internal rotation of the flexed right hip causes pain. This indicates an inflamed **pelvic appendix** irritating the obturator internus muscle. **Clinical Pearls for NEET-PG:** * **McBurney’s Point:** Located 1/3rd of the distance from the ASIS to the umbilicus; the site of maximum tenderness. * **Psoas Sign:** Pain on extension of the right hip; indicates a **retrocecal appendix**. * **Grey Turner’s Sign:** Ecchymosis in the flanks (also seen in pancreatitis). * **Sherren’s Triangle:** Formed by the umbilicus, ASIS, and pubic symphysis; hyperesthesia here suggests appendicitis.

Question 702: Which surgical blade is typically used for suture removal?

A. Minor surgical procedures
B. Suture removal (Correct Answer)
C. Abscess drainage
D. Abdominal incision

Explanation: The correct answer is **Suture removal**, specifically referring to the **No. 12 blade**. ### Educational Explanation **1. Why the correct answer is right:** The **No. 12 blade** is a small, pointed, crescent-shaped blade sharpened along the inside edge of the curve. This unique "hooked" design allows the surgeon to slide the blade underneath a suture thread easily. Once positioned, the upward pulling motion cuts the suture from the inside out, minimizing skin trauma and preventing the sharp tip from accidentally pricking the patient. **2. Why the other options are incorrect:** * **Minor surgical procedures:** While many blades are used in minor surgery, the **No. 15 blade** is the gold standard. It has a small, curved cutting edge ideal for making short, precise incisions in delicate areas (e.g., hand or plastic surgery). * **Abscess drainage:** The **No. 11 blade** is preferred here. It is an elongated, triangular blade with a sharp point, perfect for "stab incisions" required to puncture and drain an abscess or for laparoscopic port insertions. * **Abdominal incision:** Large incisions (laparotomy) require the **No. 10 blade**. It has a large, curved cutting edge (the "belly") used for making long, deep incisions through skin and subcutaneous fat. ### High-Yield Clinical Pearls for NEET-PG: * **Blade Handles:** Blades #10, #11, #12, and #15 fit on the **No. 3 handle**. Larger blades like #20-#24 fit on the **No. 4 handle**. * **No. 11 Blade:** Also used for Arteriotomy and I&D (Incision and Drainage). * **No. 15 Blade:** Most common blade used for skin biopsies and fine surgical work. * **Safety Tip:** Always use a needle holder (not fingers) to attach or remove blades from the handle to prevent needle-stick injuries.

Question 703: Eminectomy is done for the treatment of which of the following conditions?

A. TMJ ankylosis
B. TMJ dislocation (Correct Answer)
C. Coronoid fracture
D. All of the above

Explanation: **Explanation:** **Eminectomy** is a surgical procedure involving the removal of the **articular eminence** of the temporal bone. It is primarily indicated for the treatment of **chronic recurrent temporomandibular joint (TMJ) dislocation**. **Why Option B is Correct:** In chronic recurrent dislocation, the mandibular condyle translates too far forward beyond the articular eminence and becomes trapped, unable to return to the glenoid fossa. By performing an eminectomy, the mechanical barrier (the eminence) is removed. This allows the condyle to move freely in and out of the fossa without getting locked, effectively preventing future episodes of painful dislocation. **Why Other Options are Incorrect:** * **TMJ Ankylosis (Option A):** This involves the fusion of the joint (fibrous or bony). The standard surgical treatments are **gap arthroplasty** or **interpositional arthroplasty**, not eminectomy. * **Coronoid Fracture (Option C):** Fractures of the coronoid process are usually managed conservatively or via **open reduction and internal fixation (ORIF)** if displaced. Eminectomy does not address the coronoid process or its fractures. **High-Yield Clinical Pearls for NEET-PG:** * **First-line management** for acute TMJ dislocation is manual reduction (Nelaton’s maneuver). * **Dautrey’s Procedure:** An alternative to eminectomy where the zygomatic arch is fractured and displaced downward to create a *larger* barrier to prevent the condyle from slipping forward. * **Conservative management** for recurrent dislocation includes sclerosing agents or botulinum toxin injections into the lateral pterygoid muscle. * **Key Anatomy:** The articular eminence forms the anterior boundary of the glenoid fossa.

Question 704: A burn wound extending into the superficial epidermis without involving the dermis would present with all of the following except?

A. Healing of the wound spontaneously without scar formation
B. Anaesthesia at the site of burns (Correct Answer)
C. Blister formation
D. Painful

Explanation: This question tests the ability to differentiate between burn depths based on clinical presentation, a high-yield topic in NEET-PG Surgery. ### **Explanation of the Correct Answer** **Option B (Anaesthesia at the site of burns)** is the correct answer because it is **not** a feature of superficial burns. Anaesthesia (loss of sensation) occurs only in **Third-degree (Full-thickness)** burns, where the entire dermis is destroyed, leading to the complete destruction of sensory nerve endings. In superficial and partial-thickness burns, these nerve endings remain intact and irritated, causing significant pain rather than numbness. ### **Analysis of Incorrect Options** * **Option A (Healing without scar):** Superficial burns (1st degree) and superficial partial-thickness burns (2nd degree) involve only the epidermis or the upper layer of the dermis. Since the regenerative capacity of the basal layer or skin appendages is preserved, these wounds heal spontaneously (usually within 7–14 days) without scarring. * **Option C & D (Blister formation and Pain):** These are hallmark features of **Superficial Partial-Thickness burns**. Blisters form due to the separation of the epidermis from the dermis with fluid accumulation. Because the nerve endings are exposed and viable, these burns are exquisitely painful and sensitive to air/touch. ### **High-Yield Clinical Pearls for NEET-PG** | Burn Depth | Clinical Features | Sensation | Healing | | :--- | :--- | :--- | :--- | | **1st Degree** | Erythema (Sunburn) | Painful | 3-5 days; No scar | | **2nd Degree (Superficial)** | **Blisters**, Moist, Red | **Very Painful** | 7-21 days; No scar | | **2nd Degree (Deep)** | Waxy white, Mottled | Reduced sensation | >3 weeks; **Hypertrophic Scar** | | **3rd Degree** | Leathery, Charred, Dry | **Anaesthetic** | Requires Grafting | * **Note:** Capillary refill is present in superficial burns but absent in deep/full-thickness burns.

Question 705: Which of the following management strategies is NOT required for a patient with diabetes and an HbA1c of 11%?

A. Off-loading
B. Debridement
C. Antiseptic agent dressings (Correct Answer)
D. Antibiotics

Explanation: **Explanation:** The patient presents with uncontrolled diabetes (HbA1c 11%), which significantly impairs wound healing and increases the risk of diabetic foot ulcers. The management of such ulcers follows the **Wound Bed Preparation (TIME)** principle and focuses on addressing the underlying pathophysiology. **Why Option C is the Correct Answer:** Modern wound care guidelines discourage the routine use of **antiseptic agent dressings** (like povidone-iodine, hydrogen peroxide, or EUSOL) for chronic diabetic ulcers. These agents are **cytotoxic** to fibroblasts and keratinocytes, which are essential for granulation tissue formation and re-epithelialization. While they kill bacteria, they also delay wound healing. Instead, saline-soaked dressings or advanced moisture-retentive dressings are preferred. **Analysis of Incorrect Options:** * **A. Off-loading:** This is the **gold standard** and most critical step in managing neuropathic ulcers. It redistributes pressure away from the wound to allow healing. * **B. Debridement:** Necessary to remove necrotic tissue and bacterial biofilm, which act as barriers to healing and a nidus for infection. * **D. Antibiotics:** Given the high HbA1c (11%), the patient is severely immunocompromised and at high risk for limb-threatening infections (cellulitis or osteomyelitis). Systemic antibiotics are indicated if clinical signs of infection are present. **NEET-PG High-Yield Pearls:** * **HbA1c Goal:** For elective surgery, the target is usually <7%. An HbA1c of 11% indicates a high risk of postoperative complications. * **Off-loading Gold Standard:** Total Contact Casting (TCC). * **Wagner’s Classification:** Used to grade diabetic foot ulcers (Grade 0 to 5). * **Rule of Thumb:** "If it's wet, dry it; if it's dry, wet it." Avoid harsh antiseptics on healthy granulation tissue.

Question 706: Aaron's sign is seen in which of the following conditions?

A. Chronic appendicitis
B. Hiatus hernia
C. Mediastinal emphysema
D. Acute appendicitis (Correct Answer)

Explanation: **Explanation:** **Aaron’s sign** is a clinical sign associated with **Acute Appendicitis**. It is characterized by referred pain or distress in the epigastrium or precordial region when continuous firm pressure is applied over **McBurney’s point**. This occurs due to the stimulation of the visceral afferent nerves (T10 sympathetic fibers) as the inflamed appendix irritates the parietal peritoneum, causing referred pain in the epigastric region. **Analysis of Options:** * **Acute Appendicitis (Correct):** Aaron’s sign is a classic, though less frequently tested, sign of early appendicitis, alongside more common signs like Rovsing’s and the Psoas sign. * **Chronic Appendicitis:** This is a controversial clinical entity; Aaron’s sign is specifically associated with the acute inflammatory process and peritoneal irritation. * **Hiatus Hernia:** While this causes epigastric discomfort, it is unrelated to McBurney’s point tenderness. * **Mediastinal Emphysema:** This is associated with **Hamman’s sign** (a crunching sound heard over the precordium synchronous with the heartbeat), not Aaron’s sign. **High-Yield Clinical Pearls for NEET-PG:** * **McBurney’s Point:** Located 1/3rd of the distance from the Right Anterior Superior Iliac Spine (ASIS) to the Umbilicus. * **Rovsing’s Sign:** Pain in the RIF on pressing the LIF. * **Psoas Sign:** Pain on extension of the right hip (suggests retrocecal appendix). * **Obturator Sign:** Pain on internal rotation of the flexed right hip (suggests pelvic appendix). * **Sherren’s Triangle:** Formed by the ASIS, Umbilicus, and Symphysis Pubis; hyperesthesia in this area suggests appendicular rupture.

Question 707: What is the most common posterior mediastinal tumor?

A. Lung cyst
B. Neurofibroma (Correct Answer)
C. Dermoid
D. Thyroid

Explanation: ### Explanation The mediastinum is anatomically divided into compartments, each characterized by specific types of resident tissues and associated pathologies. The **posterior mediastinum** (the space between the pericardium and the spine) is primarily occupied by the esophagus, descending aorta, and the paravertebral sympathetic chain/intercostal nerves. **Why Neurofibroma is Correct:** Neurogenic tumors are the most common primary tumors of the posterior mediastinum, accounting for approximately 75% of masses in this region. Among these, **Neurofibromas** and Neurilemmomas (Schwannomas) are the most frequent histological types. They typically arise from the intercostal nerves or the spinal nerve roots. **Analysis of Incorrect Options:** * **A. Lung Cyst:** These are intrapulmonary lesions. While bronchogenic cysts can occur in the mediastinum, they are more commonly found in the **middle mediastinum** near the carina. * **C. Dermoid:** Germ cell tumors, including dermoid cysts (teratomas), are characteristically found in the **anterior mediastinum**. * **D. Thyroid:** Retrosternal goiters or ectopic thyroid tissue are classic causes of masses in the **superior and anterior mediastinum**. **NEET-PG High-Yield Pearls:** * **Anterior Mediastinum (The 4 Ts):** Thymoma (most common), Teratoma, Thyroid (retrosternal), and "Terrible" Lymphoma. * **Middle Mediastinum:** Lymphadenopathy, Bronchogenic cysts, and Pericardial cysts. * **Posterior Mediastinum:** Neurogenic tumors (Neurofibroma, Schwannoma, Ganglioneuroma). * **Clinical Sign:** Neurogenic tumors may present as "dumbbell" or "hourglass" tumors if they extend through the intervertebral foramina into the spinal canal.

Question 708: Chromic catgut suture has the added advantage of being:

A. Delayed resorption (Correct Answer)
B. No resorption
C. Early resorption
D. Greater adherence

Explanation: **Explanation:** **Chromic catgut** is a natural, absorbable, multifilament suture derived from the submucosa of sheep intestine or the serosa of bovine intestine. The "plain" version of catgut is absorbed rapidly by enzymatic digestion (proteolysis). 1. **Why Option A is correct:** To improve its handling and longevity, the suture is treated with **chromium salts** (chromicization). This process creates cross-links between collagen fibers, making the suture more resistant to enzymatic breakdown. This results in **delayed resorption**, extending the tensile strength of the suture from about 7–10 days (plain) to approximately **14–21 days** (chromic). 2. **Why Options B and C are wrong:** * **No resorption (B):** Catgut is inherently organic and will always be absorbed; non-absorbable sutures like Silk or Prolene fit this description. * **Early resorption (C):** This describes Plain Catgut, which loses strength very quickly and is unsuitable for tissues under tension. 3. **Why Option D is wrong:** Chromic catgut actually has a smoother surface than plain catgut, reducing tissue drag rather than increasing adherence. **High-Yield NEET-PG Pearls:** * **Mechanism of Absorption:** Catgut is absorbed by **proteolysis/enzymatic digestion** (unlike synthetic sutures like Vicryl, which are absorbed by **hydrolysis**). * **Tissue Reaction:** It causes a significant inflammatory response because it is a foreign protein. * **Contraindication:** Never use catgut in infected tissues or for vascular anastomoses. * **Sterilization:** It is sterilized by **Gamma radiation** (it cannot be autoclaved as it is a protein).

Question 709: Pneumothorax of what size generally needs operative treatment?

A. >10%
B. >20% (Correct Answer)
C. >30%
D. >40%

Explanation: **Explanation:** The management of a pneumothorax is determined by the patient's clinical stability and the size of the collapse. In surgical practice and standard textbooks (like Bailey & Love), a pneumothorax is generally classified as "small" if it is <20% and "large" if it is **>20%** of the hemithorax volume. **Why >20% is correct:** A pneumothorax exceeding 20% typically results in significant respiratory compromise and a reduced physiological reserve. Such cases generally require active intervention, such as **tube thoracostomy (ICD)** or needle aspiration, rather than simple observation. Spontaneous resolution of air occurs at a slow rate (approx. 1.25% per day); therefore, larger leaks (>20%) would take too long to resolve naturally and carry a higher risk of progressing to a tension pneumothorax. **Analysis of Incorrect Options:** * **A (>10%):** Too small. Most stable patients with a <10-15% pneumothorax can be managed conservatively with observation and repeat X-rays. * **C & D (>30% and >40%):** While these definitely require treatment, the threshold for initiating operative/interventional treatment starts at **20%**. Waiting until 30-40% collapse would delay necessary care for a symptomatic patient. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Chest X-ray (PA view) in full expiration. * **Most sensitive Investigation:** CT Thorax. * **Management:** * Small (<20%), asymptomatic: Observation + Oxygen (O2 increases the rate of absorption). * Large (>20%) or symptomatic: Intercostal Drainage (ICD). * **ICD Insertion Site:** 5th intercostal space, anterior to the mid-axillary line (Safe Triangle). * **Tension Pneumothorax:** A clinical diagnosis; requires immediate needle decompression in the 2nd ICS (MCL) or 5th ICS (AAL) before getting an X-ray.

Question 710: What is true about spigelian hernia?

A. It is seen in the femoral triangle region.
B. It occurs only in males.
C. It is due to a defect in the transversus abdominis muscle and lies between muscle layers. (Correct Answer)
D. It always contains the appendix.

Explanation: ### Explanation **Spigelian hernia**, also known as a **spontaneous lateral ventral hernia**, occurs through the Spigelian fascia. This fascia is the aponeurotic layer located between the lateral border of the rectus abdominis muscle and the semilunar line (the transition from the transversus abdominis muscle to its aponeurosis). **Why Option C is Correct:** The hernia defect occurs specifically in the **transversus abdominis aponeurosis**. A defining characteristic of this hernia is that it is **interparietal** (intramural); the hernial sac typically dissects between the internal oblique and external oblique muscle layers. Because it is covered by the external oblique aponeurosis, it is often difficult to palpate and lacks a visible external bulge. **Why Other Options are Incorrect:** * **Option A:** Spigelian hernias occur in the abdominal wall, most commonly at the **Spigelian hernia belt** (a transverse zone at the level of the arcuate line). The femoral triangle is the site for femoral hernias. * **Option B:** It occurs in both males and females, with a slightly higher incidence reported in females. * **Option D:** While any abdominal organ can herniate, the most common contents are omentum or small bowel. A hernia containing the appendix is specifically called an *Amyand’s hernia* (if in the inguinal canal). **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most common at or below the level of the **arcuate line** (where the posterior rectus sheath is absent). * **Clinical Presentation:** Patients often present with localized pain but no palpable mass. * **Diagnosis:** **Ultrasound or CT scan** is the investigation of choice due to its interparietal nature. * **Management:** High risk of strangulation due to narrow neck; therefore, surgical repair (open or laparoscopic) is always recommended.

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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