General Surgery Principles Practice Questions

Q: Neurosurgical treatment of epilepsy usually involves removal of the epileptic focus from which lobe?

Temporal lobe. **Explanation:** The **Temporal lobe** is the most common site for medically refractory focal epilepsy in adults. The underlying medical concept is **Mesial Temporal Sclerosis (MTS)**, which involves scarring of the hippocampus. This condition is the most frequent cause of drug-resistant epilepsy that is amenable to surgical intervention. The standard surgical procedure is an **Anterior Temporal Lobectomy (ATL)** or Selective Amygdalohippocampectomy, which boasts a high success rate (60-80% seizure-free outcomes). **Analysis of Incorrect Options:** * **Frontal Lobe:** This is the second most common site for focal epilepsy. However, frontal lobe seizures are often harder to localize and have lower surgical success rates compared to temporal lobe epilepsy. * **Parietal and Occipital Lobes:** Seizures originating from these posterior lobes are significantly rarer. Surgery in these areas carries a higher risk of functional deficits, such as visual field defects (Occipital) or sensory-motor impairment (Parietal). **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** MRI is the imaging modality of choice to identify structural lesions like MTS. * **Functional Mapping:** Before surgery, the **Wada Test** (Intracarotid Sodium Amobarbital Procedure) is often performed to determine hemispheric dominance for language and memory to avoid postoperative deficits. * **Indications:** Surgery is considered when a patient has "Refractory Epilepsy," defined as failure of two or more appropriately chosen and tolerated Anti-Epileptic Drugs (AEDs).

Q: Bleeding caused in an extraction socket due to wound sepsis after a few days is called as?

Secondary hemorrhage. **Explanation:** The correct answer is **Secondary Hemorrhage**. This classification is based on the timing and etiology of the bleeding relative to the surgical procedure or injury. **1. Why Secondary Hemorrhage is correct:** Secondary hemorrhage occurs **7 to 14 days** after a procedure. The underlying medical cause is almost always **infection (sepsis)**. Bacteria cause the breakdown of the blood clot and lead to the erosion of the vessel wall or the sloughing of a previously ligated vessel. In an extraction socket, wound sepsis dissolves the organized clot, leading to delayed bleeding. **2. Why the other options are incorrect:** * **Primary Hemorrhage:** This is bleeding that occurs **at the time of injury or operation**. It is the immediate result of vessel transection. * **Reactionary Hemorrhage:** This occurs within **24 hours** (usually 4–6 hours) of the procedure. It is typically caused by a rise in blood pressure as the patient recovers from anesthesia, the slipping of a ligature, or the reversal of vasoconstriction. * **Systemic Hemorrhage:** This is not a standard chronological classification of surgical bleeding; it refers to bleeding tendencies caused by systemic disorders (like hemophilia or thrombocytopenia) rather than a localized wound issue. **Clinical Pearls for NEET-PG:** * **The Rule of Timing:** Primary (Immediate), Reactionary (<24 hours), Secondary (1–2 weeks). * **Key Trigger:** If a question mentions "infection," "sepsis," or "sloughing," the answer is invariably **Secondary Hemorrhage**. * **Management:** While primary and reactionary bleeding often require mechanical control (ligation/cautery), secondary hemorrhage is primarily managed by treating the infection (antibiotics) and local packing, though severe cases may require proximal vessel ligation.

Q: What is the tensile strength of a wound scar compared to normal skin?

Approximately 80% of normal skin. ### Explanation The tensile strength of a wound is a measure of its capacity to resist rupture under tension. This process is governed by the synthesis, cross-linking, and remodeling of collagen. **Why Option C is Correct:** Wound healing occurs in phases: inflammatory, proliferative, and remodeling. During the **remodeling phase** (starting at 3 weeks and lasting up to a year), Type III collagen is replaced by stronger **Type I collagen**, and fibers are reorganized along lines of tension. Despite this maturation, a healed scar never regains the full structural integrity of unwounded skin. It reaches approximately **80% of the original tensile strength** by the end of 3 months, which is considered its ultimate plateau. **Why Other Options are Incorrect:** * **Option A & B:** A scar is functionally inferior to normal skin. The lack of identical basket-weave collagen architecture and the absence of elastic fibers mean it can never be "similar to" or "more than" normal skin. * **Option D:** While tensile strength is approximately 50% at 4–5 weeks, the question asks for the final strength of a "wound scar" (implying a matured state), which reaches the 80% mark. **NEET-PG High-Yield Pearls:** * **Timeline of Strength:** * **End of 1st week:** 3% (Sutures are the only strength). * **End of 3rd week:** 20% (Rapid increase due to collagen cross-linking). * **End of 3rd month:** 80% (Plateau phase). * **Collagen Shift:** Healing begins with **Type III collagen** (granulation tissue) and matures into **Type I collagen** (scar tissue). * **Vitamin C** is a crucial cofactor for the hydroxylation of proline and lysine; deficiency leads to poor tensile strength and wound dehiscence.

Q: Which of the following statements is true regarding a paramedian incision?

The rectus sheath is cut medially.. **Explanation:** The **paramedian incision** is a vertical incision made approximately 2–5 cm lateral to the midline. Its primary advantage is that it creates a "valve-like" closure, which reduces the risk of incisional hernia compared to a midline incision. **Why Option C is correct:** In a paramedian incision, the anterior rectus sheath is divided vertically. The **rectus muscle is then retracted laterally**. To access the posterior rectus sheath and peritoneum, the incision must be made **medially** (near the linea alba). By retracting the muscle laterally, the nerve supply (which enters the muscle from the lateral side) is preserved, and the muscle acts as a biological barrier over the wound once it returns to its original position. **Why other options are incorrect:** * **Option A:** A paramedian incision can be performed both **above and below** the umbilicus, depending on the organ being accessed (e.g., gallbladder vs. sigmoid colon). * **Option B:** If the rectus sheath were cut laterally or the muscle retracted medially, the **intercostal nerves** entering the lateral border of the rectus muscle would be severed, leading to muscle atrophy. * **Option D:** Because the nerves are preserved by lateral retraction, there is **no loss of sensation or motor function** in the rectus muscle. **High-Yield NEET-PG Pearls:** * **Nerve Preservation:** The paramedian incision is "physiologic" because it avoids denervating the rectus muscle. * **Incisional Hernia:** It has a lower rate of incisional hernia compared to midline incisions but takes longer to perform and close. * **Battle’s Incision:** A variation (lateral paramedian) where the muscle is retracted medially; this is rarely used now as it risks denervating the medial portion of the muscle.

Q: A mediastinoscope can visualize all of the following lymph nodes except?

Aortopulmonary window lymph node. **Explanation:** Mediastinoscopy is a surgical procedure used primarily for the staging of lung cancer and diagnosing mediastinal lymphadenopathy. The scope is inserted through a pretracheal plane (behind the major vessels but in front of the trachea), which dictates which nodes are accessible. **1. Why Option B is Correct:** The **Aortopulmonary (AP) window lymph nodes (Station 5)** and **Para-aortic nodes (Station 6)** are located lateral to the aortic arch and the ligamentum arteriosum. Because the mediastinoscope stays in the midline/paratracheal plane, it cannot reach these lateral structures. To visualize the AP window, a **Video-Assisted Thoracoscopic Surgery (VATS)** or a **Chamberlain procedure (Anterior Mediastinotomy)** is required. **2. Why Incorrect Options are Wrong:** * **Right paratracheal (Station 4R) and Left paratracheal (Station 4L):** These are the primary targets of cervical mediastinoscopy as they lie directly adjacent to the trachea. * **Anterior tracheal (Station 2):** These are easily accessible as the scope passes directly over the anterior surface of the trachea. * **Subcarinal (Station 7):** By following the trachea down to the bifurcation (carina), the surgeon can access the nodes located immediately below it. **Clinical Pearls for NEET-PG:** * **Standard Mediastinoscopy** can access Stations 1, 2, 3, 4, and 7. * **Chamberlain Procedure:** Specifically used for Station 5 (AP window) and Station 6 (Para-aortic) nodes. * **Complication:** The most common serious complication of mediastinoscopy is hemorrhage, usually from the **Innominate artery** or **Azygos vein**. * **Contraindication:** Previous mediastinoscopy (due to scarring/adhesions) is a relative contraindication.

Q: What is the most common location for a Morgagni hernia?

Right anterior. **Explanation:** **Morgagni hernia** is a type of congenital diaphragmatic hernia (CDH) that occurs through the **Foramen of Morgagni**. This is an anterior defect in the diaphragm located between the sternal and costal attachments. 1. **Why Right Anterior is Correct:** The Foramen of Morgagni is a retrosternal/parasternal space. While the potential space exists on both sides, **90% of Morgagni hernias occur on the right side.** This is because the left side is anatomically protected by the **pericardial attachments** and the heart, which provide a physical barrier against herniation. Therefore, the right anterior position is the most common site. 2. **Why Other Options are Incorrect:** * **Right/Left Posterior:** Posterior diaphragmatic defects are associated with **Bochdalek hernias** (the most common type of CDH overall). Remember the mnemonic: **B**ochdalek is **B**ack (Posterior). * **Left Anterior:** While Morgagni hernias can occur on the left, they are rare (approx. 2-5%) due to the protective presence of the heart and pericardium. **High-Yield Clinical Pearls for NEET-PG:** * **Morgagni vs. Bochdalek:** Bochdalek is posterior (most common CDH overall, usually left-sided); Morgagni is anterior (less common, usually right-sided). * **Contents:** The most common organ to herniate in a Morgagni hernia is the **liver**, followed by the omentum and colon. * **Presentation:** Unlike Bochdalek hernias, which present with neonatal respiratory distress, Morgagni hernias are often **asymptomatic** in childhood and are frequently discovered incidentally on chest X-rays in adults. * **Radiology:** On a lateral chest X-ray, Morgagni hernia appears as a mass in the **anterior cardiophrenic angle**.

Q: Healing below the knee joint is slow primarily because of which factor?

Poor vascularity. **Explanation:** The primary reason for delayed wound healing below the knee joint, particularly in the pretibial region and the lower third of the leg, is **poor vascularity**. 1. **Why Poor Vascularity is Correct:** The skin over the anterior aspect of the tibia is thin and lies almost directly over the bone (periosteum). This area has a relatively sparse blood supply compared to the thigh or trunk. Furthermore, the venous return in the lower limbs must work against gravity, often leading to venous stasis, which further compromises arterial inflow and tissue oxygenation—both of which are critical for collagen synthesis and fibroblast activity. 2. **Analysis of Incorrect Options:** * **Decreased subcutaneous fat (A):** While the lack of fat makes the area more prone to injury (lack of cushioning), it is not the physiological driver of slow cellular repair; blood supply is. * **Increased movement (B):** While movement can disrupt wound edges, the knee joint itself is often immobilized in trauma. Movement is a secondary factor compared to the metabolic demands of healing. * **Weight bearing (C):** Weight bearing can cause mechanical stress, but even in non-weight-bearing patients, pretibial wounds heal slowly due to the inherent lack of a robust vascular bed. **Clinical Pearls for NEET-PG:** * **The "Danger Zone":** The lower third of the leg is notorious for poor healing and is a common site for chronic ulcers (venous, arterial, or neuropathic). * **Anatomical Factor:** The tibia is a "subcutaneous bone," meaning its anteromedial surface is not covered by muscle. Muscles provide a rich vascular bed; their absence here significantly slows the granulation process. * **Management:** Because of this poor vascularity, large defects in the lower leg often require **flaps** (like the sural artery flap or gastrocnemius flap) rather than simple skin grafts, as the recipient bed may not support a graft.

Question 1

Neurosurgical treatment of epilepsy usually involves removal of the epileptic focus from which lobe?

Accepted Answer

Temporal lobe

Answer

Frontal lobe

Answer

Occipital lobe

Answer

Parietal lobe

Question 2

Bleeding caused in an extraction socket due to wound sepsis after a few days is called as?

Accepted Answer

Secondary hemorrhage

Answer

Primary hemorrhage

Answer

Reactionary hemorrhage

Answer

Systemic hemorrhage

Question 3

What is the tensile strength of a wound scar compared to normal skin?

Accepted Answer

Approximately 80% of normal skin

Answer

Similar to normal skin

Answer

More than normal skin

Answer

Approximately 50% of normal skin

Question 4

Which of the following statements is true regarding a paramedian incision?

Accepted Answer

The rectus sheath is cut medially.

Answer

It is done below the umbilicus.

Answer

The rectus sheath is cut laterally.

Answer

It decreases sensation in the rectus muscle.

Question 5

Which of the following statements regarding direct inguinal hernia is true?

Accepted Answer

A direct hernia is medial to the inferior epigastric artery.

Answer

It is the most common direct inguinal hernia in women.

Answer

Repair involves the transversalis fascia and the internal ring.

Answer

It typically descends downwards and inwards towards the scrotum.

Question 6

A mediastinoscope can visualize all of the following lymph nodes except?

Accepted Answer

Aortopulmonary window lymph node

Answer

Right paratracheal lymph node

Answer

Anterior tracheal lymph node

Answer

Subcarinal lymph node

Question 7

What is the most common site for a hypertrophic keloid?

Accepted Answer

Presternal area

Answer

Face

Answer

Leg

Answer

Arm

Question 8

What is the most common location for a Morgagni hernia?

Accepted Answer

Right anterior

Answer

Right posterior

Answer

Left anterior

Answer

Left posterior

Question 9

Healing below the knee joint is slow primarily because of which factor?

Accepted Answer

Poor vascularity

Answer

Decreased subcutaneous fat

Answer

Increased movement

Answer

Weight bearing

Question 10

A chronic wound may be defined as one that fails to heal by what duration?

Accepted Answer

3 weeks

Answer

1 week

Answer

2 weeks

Answer

4 weeks

General Surgery Principles — MCQs

General Surgery Principles — MCQs

On this page

Practice by Chapter

Want unlimited practice?