General Surgery Principles Practice Questions

Q: All of the following are true regarding lung abscess, EXCEPT?

Abscesses greater than 2 cm in size require excision.. ### Explanation **1. Why Option A is the correct (False) statement:** The management of lung abscess is primarily **medical**, not surgical. Over 80-90% of lung abscesses resolve with prolonged antibiotic therapy (usually 4–6 weeks) and postural drainage. Size alone is not an indication for surgery; even large abscesses (e.g., >6 cm) are initially managed medically. Surgery (resection or drainage) is reserved for complications like massive hemoptysis, suspicion of malignancy, or failure of medical therapy after 6–8 weeks. **2. Analysis of other options:** * **Option B:** If a lung abscess ruptures into the pleural space, it leads to a **pyopneumothorax** or empyema [1]. In such cases, the immediate and often sufficient treatment is the insertion of an Intercostal Drainage (ICD) tube to drain the pleural space [3]. * **Option C:** While aspiration of oropharyngeal contents (often following dental infections or altered consciousness) is the most common mechanism, these are technically categorized as complications arising from the flora of the upper respiratory tract/oropharynx. * **Option D:** This is a true statement. Surgery is indicated in less than 10-15% of cases. The mainstay remains targeted antibiotics. **3. Clinical Pearls for NEET-PG:** * **Most common site:** The **posterior segment of the right upper lobe** and the **superior segment of the right lower lobe** (due to the anatomy of the right main bronchus and gravity during aspiration). * **Microbiology:** Most are polymicrobial, involving **anaerobes** (Bacteroides, Peptostreptococcus). * **Radiology:** Characterized by a thick-walled cavity with an **air-fluid level**. * **Indications for Surgery:** Failure of medical therapy, abscess >6 cm (relative), massive hemoptysis [2], or suspected bronchogenic carcinoma.

Q: A traumatic wound was cleaned and dressed. A few days later, suturing was done to approximate the edges. This type of wound healing is termed as:

Tertiary intention. **Explanation:** The correct answer is **Tertiary intention**, also known as **Delayed Primary Closure**. **1. Why Tertiary Intention is correct:** Tertiary intention occurs when a wound is initially left open (often due to contamination, infection, or high tension) and managed with cleaning, debridement, and dressings. Once the wound bed is clean and granulation tissue appears (usually after 3–5 days), the edges are surgically approximated with sutures. This method combines the benefits of initial drainage with the final cosmetic result of primary closure. **2. Why other options are incorrect:** * **Primary intention:** This involves immediate closure of clean, surgical wounds using sutures, staples, or tape. There is no waiting period, and minimal tissue loss occurs. * **Secondary intention:** The wound is left open to heal spontaneously through granulation, contraction, and epithelialization. This is used for infected or heavily contaminated wounds where suturing is not possible. It results in a larger scar. * **Delayed secondary intention:** This is not a standard surgical term. Healing is either primary, secondary, or tertiary (delayed primary). **3. NEET-PG High-Yield Pearls:** * **Primary Intention:** Best cosmetic result; occurs in clean surgical incisions. * **Secondary Intention:** Characterized by **Myofibroblasts** (responsible for wound contraction). * **Tertiary Intention:** Ideal for contaminated traumatic wounds or "dirty" surgeries (e.g., ruptured appendix) to prevent abscess formation. * **Timeline:** If a wound is closed *after* the appearance of granulation tissue, it is tertiary intention.

Q: A 36-year-old male presents with a swelling in the submandibular region, elevated tongue, dysphagia, and high fever. Intraoral examination reveals a grossly destructed lower first molar. What would be your initial diagnosis?

Both submandibular and submental infection. ### Explanation The clinical presentation described—submandibular swelling, elevation of the tongue (indicating involvement of the sublingual space), dysphagia, and high fever—is a classic description of **Ludwig’s Angina**. **1. Why Option C is Correct:** Ludwig’s Angina is a rapidly spreading cellulitis (not an abscess) involving the **submandibular, sublingual, and submental spaces** bilaterally. The infection typically originates from an odontogenic source, most commonly the lower second or third molars (though the first molar is also frequently involved). Because the submandibular and submental spaces are anatomically continuous, an infection originating from a mandibular tooth quickly involves both to produce the characteristic "woody" edema and tongue elevation. **2. Why Other Options are Incorrect:** * **Option A & B:** While these spaces are involved, selecting only one is incomplete. The hallmark of this clinical picture (especially the elevated tongue and systemic symptoms) is the multi-spatial involvement. * **Option D:** Parapharyngeal infection presents with lateral pharyngeal wall swelling, trismus, and deviation of the tonsil, but it does not typically cause the characteristic elevation of the tongue seen in submandibular/sublingual infections. **3. NEET-PG Clinical Pearls:** * **Source:** 70–90% of cases are odontogenic. * **Key Sign:** The tongue is pushed **upwards and backwards**, which can lead to rapid airway obstruction (the most common cause of death). * **Management:** The priority is **Airway Management** (often requiring tracheostomy if intubation fails). Treatment includes high-dose IV antibiotics and surgical decompression (incision and drainage) if there is no improvement. * **Microbiology:** Usually a polymicrobial mix of aerobes and anaerobes (Streptococcus, Bacteroides, Fusobacterium).

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.

Question 1

All of the following are true regarding lung abscess, EXCEPT?

Accepted Answer

Abscesses greater than 2 cm in size require excision.

Answer

If rupture into the pleura occurs, simple drainage is sufficient.

Answer

The most common cause is secondary to upper respiratory tract infection.

Answer

Surgery is not usually part of the treatment.

Question 2

A traumatic wound was cleaned and dressed. A few days later, suturing was done to approximate the edges. This type of wound healing is termed as:

Accepted Answer

Tertiary intention

Answer

Primary intention

Answer

Secondary intention

Answer

Delayed secondary intention

Question 3

A 36-year-old male presents with a swelling in the submandibular region, elevated tongue, dysphagia, and high fever. Intraoral examination reveals a grossly destructed lower first molar. What would be your initial diagnosis?

Accepted Answer

Both submandibular and submental infection

Answer

Submandibular space infection

Answer

Submental space infection

Answer

Parapharyngeal infection

Question 4

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 5

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 6

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 7

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 8

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 9

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 10

What is the most common site for a hypertrophic keloid?

Accepted Answer

Presternal area

Answer

Face

Answer

Leg

Answer

Arm

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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