General Surgery Principles Practice Questions

Q: A 20-year-old female presents to the casualty with right iliac fossa pain, local guarding, and tenderness. Which of the following management interventions should NOT be done?

None of the above. **Explanation:** The clinical presentation of right iliac fossa (RIF) pain, local guarding, and tenderness in a young female is highly suggestive of **Acute Appendicitis** or an acute surgical abdomen. The management of such cases follows the standard surgical principle of "stabilize and prepare for potential surgery." **1. Why "None of the above" is correct:** All the interventions listed (A, B, and C) are standard, appropriate management steps for a patient with a suspected acute abdomen. Therefore, none of them are contraindicated. **2. Analysis of Options:** * **Nil Orally (NPO):** This is the most critical initial step. It prevents aspiration during potential emergency anesthesia and rests the bowel. * **Intravenous Glucose/Fluids:** Since the patient is NPO and may have lost fluids due to vomiting or decreased intake, IV fluids (often Dextrose-Normal Saline) are essential to maintain hydration and electrolyte balance. * **Pethidine (Analgesia):** Historically, there was a myth that analgesics "mask" the signs of peritonitis. Modern surgical teaching (and ATLS guidelines) emphasizes that providing pain relief (like Pethidine or Morphine) does **not** interfere with the diagnosis and is humane. It reduces patient distress and may actually make the physical exam easier by reducing voluntary guarding. **Clinical Pearls for NEET-PG:** * **Analgesia in Acute Abdomen:** Opioids do not mask physical signs or delay diagnosis; they are recommended once a preliminary evaluation is done. * **Pethidine vs. Morphine:** Pethidine was traditionally preferred in biliary colic due to the belief it causes less spasm of the Sphincter of Oddi, though recent evidence suggests little clinical difference. * **Most common cause of RIF pain in young females:** Acute appendicitis, but always rule out ectopic pregnancy (order a UPT) and ovarian torsion.

Q: Silk is which class of suture?

Class 1. **Explanation:** The classification of non-absorbable sutures is defined by the **United States Pharmacopeia (USP)** based on the material's composition and construction. **Why Class 1 is correct:** According to USP standards, **Class 1** sutures are defined as silk or synthetic fibers with a monofilament, twisted, or braided construction. Since Silk is a natural protein fiber produced by the *Bombyx mori* silkworm and is typically braided, it falls strictly into Class 1. **Analysis of incorrect options:** * **Class 2:** This category includes natural or synthetic fibers that are **coated**, or those where the coating contributes to the thickness but not the strength (e.g., cotton, linen, or coated synthetic fibers). * **Class 3:** This category is reserved specifically for **monofilament or multifilament metal wire** (e.g., stainless steel sutures). **High-Yield Clinical Pearls for NEET-PG:** * **Nature of Silk:** Although classified as "non-absorbable," silk is technically **slowly absorbable**. It undergoes progressive degradation via proteolysis and usually disappears from the tissue within 2 years. * **Tissue Reaction:** Silk elicits the **highest tissue reaction** among all non-absorbable sutures because it is a foreign protein. * **Capillarity:** Due to its braided nature, silk exhibits high capillarity (wicking action), which can harbor bacteria; therefore, it is generally avoided in the presence of active infection. * **Common Use:** It is frequently used for securing drains or in mucosal closures where its superior handling and knot security are beneficial.

Q: Which of the following is the most commonly used site for Deep Brain Stimulation to reduce the frequency of Parkinsonism symptoms?

Subthalamic Nucleus. ### Explanation **Deep Brain Stimulation (DBS)** is a neurosurgical procedure involving the implantation of electrodes into specific brain targets to modulate abnormal electrical signals. In the management of Parkinson’s Disease (PD), DBS is indicated for patients with motor fluctuations or tremors that are refractory to medical therapy. **Why Subthalamic Nucleus (STN) is the Correct Answer:** The **Subthalamic Nucleus (STN)** is the most common and preferred target for DBS in Parkinson’s Disease. Stimulating the STN effectively reduces the "off" time and allows for a significant reduction in the dosage of dopaminergic medications (like Levodopa). It is particularly effective for treating bradykinesia, rigidity, and tremors. **Analysis of Incorrect Options:** * **Globus Pallidus (GPi):** The Globus Pallidus Internus is the second most common site. While it is excellent for reducing medication-induced dyskinesias, it does not typically allow for the same degree of medication reduction as STN-DBS. * **Striatus & Putamen:** These structures are part of the basal ganglia circuitry involved in the pathology of PD. However, they are not used as primary targets for DBS because stimulating them does not provide the same therapeutic modulation of the motor circuit as the STN or GPi. **NEET-PG High-Yield Pearls:** * **Target for Essential Tremor:** The **Ventral Intermediate Nucleus (Vim)** of the Thalamus is the preferred DBS target for Essential Tremor and Parkinsonian tremor (though it doesn't help with bradykinesia). * **Target for Dystonia:** The **Globus Pallidus Internus (GPi)** is the primary target. * **Contraindication:** DBS is generally avoided in patients with significant cognitive impairment or untreated depression, as STN-DBS can sometimes worsen neuropsychiatric symptoms. * **Mechanism:** DBS acts like a "functional lesion," inhibiting overactive nuclei in the indirect pathway of the basal ganglia.

Q: Spontaneous pneumothorax exceeding what percentage of the chest cavity should have a chest tube inserted?

25%. **Explanation:** The management of a spontaneous pneumothorax is primarily determined by the size of the collapse and the patient's clinical stability. According to standard surgical guidelines (including British Thoracic Society and ATLS principles), a pneumothorax is generally considered "large" when it exceeds **25%** of the hemithorax volume (or when the distance from the chest wall to the lung margin at the level of the hilum is >2 cm). 1. **Why 25% is correct:** At this threshold, the lung's functional capacity is significantly compromised, and the rate of spontaneous resorption (approx. 1.25% per day) is too slow for conservative management. Insertion of an intercostal drainage (ICD) tube or a pigtail catheter is indicated to facilitate lung re-expansion and prevent progression to tension pneumothorax. 2. **Why other options are incorrect:** * **10%:** Small pneumothoraces (<15-20%) in asymptomatic patients can often be managed with observation and supplemental oxygen, which increases the rate of nitrogen absorption. * **45% and 60%:** These represent massive collapses. While they definitely require a chest tube, the clinical intervention threshold is much lower (at 25%) to prevent respiratory failure. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Rupture of subpleural blebs (usually in tall, thin young males). * **Site of Chest Tube:** 5th intercostal space, anterior to the mid-axillary line (Safe Triangle). * **Tension Pneumothorax:** This is a **clinical diagnosis**. Never wait for an X-ray; perform immediate needle decompression in the 5th ICS (adults) or 2nd ICS (pediatrics). * **Recurrence:** If a second episode occurs, definitive management like pleurodesis or VATS is indicated.

Q: All of the following are true regarding sebaceous cysts EXCEPT:

It only occurs on the face and scalp.. **Explanation:** The correct answer is **B** because sebaceous cysts can occur on any hair-bearing area of the body where sebaceous glands are present. While the face, scalp, and neck are the most common sites, they are frequently found on the trunk, scrotum, and labia. They are notably absent only on the palms and soles, which lack hair follicles. **Analysis of Options:** * **Option A:** Sebaceous cysts are a type of **epidermoid cyst**. They result from the obstruction of a sebaceous duct, leading to the accumulation of sebum and desquamated epithelium within a sac lined by squamous epithelium. * **Option C:** If the sebum escapes through the punctum and hardens (desiccates) on the surface, it can form a slow-growing, keratinized projection known as a **sebaceous horn**. * **Option D:** The **punctum** is a pathognomonic feature. It is a small, black opening on the skin surface representing the blocked duct orifice. It is often tethered to the underlying cyst. **High-Yield Clinical Pearls for NEET-PG:** * **Cock’s Peculiar Tumor:** This occurs when a sebaceous cyst on the scalp ulcerates and becomes infected, resembling a Squamous Cell Carcinoma (Fungating growth). * **Gardner’s Syndrome:** Multiple sebaceous (epidermoid) cysts are a known extra-intestinal manifestation of this syndrome. * **Treatment:** The gold standard is **complete surgical excision** including the cyst wall to prevent recurrence. If infected, incision and drainage (I&D) are performed first. * **Content:** The cyst contains "cheesy" material (sebum) which has a characteristic offensive odor.

Q: Interval cholecystectomy surgery is classified as which type of surgical wound?

Clean contaminated. **Explanation:** The classification of surgical wounds is based on the degree of microbial contamination at the time of surgery. **Why "Clean-Contaminated" is correct:** A **Clean-Contaminated (Class II)** wound is defined as a procedure where a hollow viscus (respiratory, alimentary, genital, or urinary tract) is entered under controlled conditions without unusual contamination. * In an **Interval Cholecystectomy**, the gallbladder is removed after an episode of acute cholecystitis has subsided (usually 6–8 weeks later). * Since the biliary tract (part of the alimentary system) is entered, but the surgery is elective, controlled, and lacks active infection or gross spillage, it fits the Class II criteria. **Analysis of Incorrect Options:** * **Clean (Class I):** These are uninfected operative wounds where no inflammation is encountered and the respiratory, alimentary, or urinary tracts are **not** entered (e.g., Hernioplasty, Thyroidectomy). * **Contaminated (Class III):** These involve open, fresh, accidental wounds or operations with major breaks in sterile technique or gross spillage from the GI tract. An *acute* cholecystitis with bile spillage would fall here. * **Dirty (Class IV):** These involve old traumatic wounds with retained devitalized tissue or existing clinical infection/perforation (e.g., perforated diverticulitis or a gallbladder abscess). **High-Yield Clinical Pearls for NEET-PG:** * **Elective Cholecystectomy:** Always Clean-Contaminated. * **Infection Rates:** Clean (<2%), Clean-Contaminated (<10%), Contaminated (15-20%), Dirty (up to 40%). * **Prophylactic Antibiotics:** Indicated for Clean-Contaminated wounds; usually not required for Clean wounds unless a prosthetic implant is used.

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

The incision can be extended upwards or downwards.. ### 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).

Q: 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?

All of the above. 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 1

A 20-year-old female presents to the casualty with right iliac fossa pain, local guarding, and tenderness. Which of the following management interventions should NOT be done?

Accepted Answer

None of the above

Answer

Intravenous glucose

Answer

Pethidine 100 mg intramuscularly

Answer

Nil orally

Question 2

Silk is which class of suture?

Accepted Answer

Class 1

Answer

Class 2

Answer

Class 3

Answer

None of the above

Question 3

Which of the following is the most commonly used site for Deep Brain Stimulation to reduce the frequency of Parkinsonism symptoms?

Accepted Answer

Subthalamic Nucleus

Answer

Striatus

Answer

Globus Pallidus

Answer

Putamen

Question 4

Spontaneous pneumothorax exceeding what percentage of the chest cavity should have a chest tube inserted?

Accepted Answer

25%

Answer

10%

Answer

45%

Answer

60%

Question 5

All of the following are true regarding sebaceous cysts EXCEPT:

Accepted Answer

It only occurs on the face and scalp.

Answer

It is classified as an epidermoid cyst.

Answer

If ulcerated, it can become a sebaceous horn.

Answer

It characteristically displays a punctum.

Question 6

Interval cholecystectomy surgery is classified as which type of surgical wound?

Accepted Answer

Clean contaminated

Answer

Clean

Answer

Contaminated

Answer

Dirty

Question 7

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

Accepted Answer

The incision can be extended upwards or downwards.

Answer

Most suitable if the diagnosis of appendicitis is definite.

Answer

If it is converted into a muscle cutting incision it is called Rutherford Morison's incision.

Answer

Inguinal hernia is a sequel of the incision.

Question 8

What is true about hypertrophic scars?

Accepted Answer

More common in blood group A

Answer

No genetic predisposition

Answer

No HLA association

Answer

Predominantly collagen type III

Question 9

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

Accepted Answer

Black silk

Answer

Chromic gut

Answer

Polygalactin

Answer

Cotton

Question 10

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?

Accepted Answer

All of the above

Answer

Failure to respond to medical management

Answer

Suspected neoplasm

Answer

Hemorrhage

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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