General Surgery Principles Practice Questions

Q: From which of the following sites should a biopsy NOT be taken?

When the lesion subsides on local treatment. ### Explanation The fundamental principle of a biopsy is to obtain a representative tissue sample from a **persistent or suspicious lesion** to establish a definitive diagnosis. **Why Option A is the Correct Answer:** If a lesion (such as an ulcer or swelling) **subsides or heals** with local treatment (e.g., antibiotics, topical steroids, or salt-water rinses), it indicates that the pathology was likely inflammatory or infectious rather than neoplastic. Performing a biopsy on a resolving lesion is unnecessary, clinically inappropriate, and would yield non-specific healing tissue rather than the primary pathology. **Analysis of Incorrect Options:** * **B. Area with large, spontaneous enlargement:** Rapid growth is a "red flag" for malignancy (e.g., high-grade sarcoma or lymphoma). These areas **must** be biopsied to rule out cancer. * **C. A pigmented lesion:** Any pigmented lesion showing changes in symmetry, border, or color (ABCDE criteria) requires a biopsy (preferably excisional) to rule out **Malignant Melanoma**. * **D. A white plaque-like lesion:** In the oral cavity or on mucosal surfaces, a persistent white plaque (Leukoplakia) is considered a **premalignant condition**. A biopsy is mandatory to check for dysplasia or squamous cell carcinoma. **Clinical Pearls for NEET-PG:** * **Indications for Biopsy:** Any lesion persisting for more than **2–3 weeks** despite removing local irritants. * **Site Selection:** Always biopsy the **edge of the lesion** (including some healthy tissue) for ulcers, but avoid necrotic centers as they do not provide viable cells. * **Pigmented Lesions:** Never perform an incisional biopsy on a suspected melanoma; **wide local excision** is the standard to prevent potential micro-metastasis and to accurately assess Breslow’s depth. * **Gold Standard:** Biopsy remains the gold standard for the definitive diagnosis of all suspected malignancies.

Q: Lung volume reduction surgery is used in the management of which of the following conditions?

Emphysema. **Explanation:** **Lung Volume Reduction Surgery (LVRS)** is a surgical procedure designed to improve respiratory mechanics in patients with severe **Emphysema** (a component of COPD). **Why Emphysema is the Correct Answer:** In emphysema, the destruction of alveolar walls leads to permanent enlargement of air spaces and loss of elastic recoil. This causes **pathological hyperinflation**, where "dead space" air is trapped in the lungs, flattening the diaphragm and making breathing inefficient. LVRS involves the excision of the most diseased, non-functioning lung tissue (usually 20-30%). This reduces hyperinflation, allowing the remaining healthier lung tissue to expand and the diaphragm to return to a more natural, dome-shaped position, thereby improving the work of breathing and gas exchange. **Why Other Options are Incorrect:** * **Bronchial Asthma:** This is a reversible airway inflammation and bronchoconstriction. Management is medical (bronchodilators/steroids), not surgical. * **Interstitial Lung Disease (ILD):** These are restrictive lung diseases characterized by fibrosis and "shrunken" lungs. LVRS would be detrimental as it further reduces already diminished lung volumes. * **Chronic Bronchitis:** While part of COPD, it is characterized by airway mucus hypersecretion rather than the localized bullous destruction seen in emphysema. LVRS does not address the underlying pathology of the conducting airways. **High-Yield Clinical Pearls for NEET-PG:** * **NETT Trial:** The National Emphysema Treatment Trial established that LVRS is most beneficial for patients with **upper-lobe predominant emphysema** and low exercise capacity. * **Gold Standard:** Lung transplantation remains the definitive treatment for end-stage COPD, but LVRS serves as a palliative bridge. * **Contraindication:** A Carbon Monoxide Diffusing Capacity (DLCO) <20% is a high-risk predictor for mortality in LVRS.

Q: Which of the following procedures is associated with the worst prognosis?

Splenectomy. The correct answer is **Splenectomy**. ### **Explanation** The spleen plays a critical role in the body’s immune defense, particularly in filtering encapsulated bacteria and producing opsonins (like tuftsin and properdin). Among the listed procedures, **Splenectomy** carries the worst long-term prognosis due to the lifelong risk of **Overwhelming Post-Splenectomy Infection (OPSI)**. OPSI is a medical emergency characterized by a fulminant course, often progressing from mild flu-like symptoms to septic shock and death within 24–48 hours. The mortality rate for OPSI remains as high as 50-70%. ### **Analysis of Other Options** * **Cholecystectomy:** Removal of the gallbladder is a routine procedure. While it may cause minor digestive changes (post-cholecystectomy syndrome), it does not compromise the immune system or significantly reduce life expectancy. * **Nephrectomy:** A single healthy kidney can compensate for the loss of the other (compensatory hypertrophy). Patients with a solitary kidney usually maintain normal renal function and a standard lifespan. * **Appendectomy:** The appendix is a vestigial organ in adults. Its removal has no documented long-term negative impact on survival or systemic health. ### **NEET-PG High-Yield Pearls** * **Most common organisms in OPSI:** *Streptococcus pneumoniae* (most common), *Haemophilus influenzae* type B, and *Neisseria meningitidis*. * **Vaccination Protocol:** Patients should receive vaccinations against the above organisms at least **14 days before** elective surgery or **14 days after** emergency surgery. * **Prophylaxis:** Daily oral penicillin is often recommended for children post-splenectomy until at least age 5 or for at least 2 years post-procedure in adults. * **Hematologic markers:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on a peripheral smear post-splenectomy.

Q: Maximum tissue reaction is associated with which suture material?

Plain catgut. **Explanation:** The degree of tissue reaction to a suture material is primarily determined by its origin (natural vs. synthetic) and its structure (monofilament vs. multifilament). **Why Plain Catgut is correct:** Plain catgut is a natural, absorbable suture derived from the submucosa of sheep intestine or the serosa of bovine intestine. Because it is a **foreign animal protein**, it triggers a significant inflammatory response. Unlike synthetic sutures that undergo hydrolysis, catgut is degraded by **enzymatic digestion** by macrophages. This process results in the highest degree of tissue reaction among all commonly used sutures, leading to faster loss of tensile strength and increased scarring. **Why the other options are incorrect:** * **Polypropylene (A):** A synthetic, non-absorbable monofilament. It is chemically inert and associated with the **least** tissue reaction, making it ideal for vascular surgery and skin closure. * **Polyglyconate (B) & Polydioxanone (C):** These are synthetic, absorbable monofilaments. Because they are synthetic, they are broken down by **hydrolysis** rather than enzymatic action, resulting in minimal inflammatory response compared to natural materials like catgut. **NEET-PG High-Yield Pearls:** * **Most Inert Suture:** Polypropylene (Prolene) or Stainless Steel. * **Suture with Highest Tissue Reaction:** Plain Catgut > Chromic Catgut > Silk. * **Degradation Mechanism:** Natural sutures (Catgut, Silk) = Proteolysis/Enzymatic; Synthetic sutures (Vicryl, PDS, Monocryl) = Hydrolysis. * **Catgut Contraindication:** Never use in the presence of infection or for suturing the biliary/urinary tract (can act as a nidus for stone formation).

Q: A skin ulcer with undermined edges suggests which of the following conditions?

Tuberculosis. **Explanation:** The character of an ulcer’s edge is a classic clinical sign used to differentiate various pathologies. In this case, **Tuberculosis (TB)** is the correct answer because TB ulcers typically present with **undermined edges**. This occurs because the subcutaneous fat and connective tissue are destroyed more rapidly by the caseous necrosis than the overlying skin, causing the skin to "overhang" the floor of the ulcer. **Analysis of Options:** * **Tuberculosis (Correct):** Characterized by undermined edges, a bluish-purple hue of the surrounding skin, and a floor covered with pale, unhealthy granulations. * **Syphilis (Incorrect):** Tertiary syphilis (Gumma) typically presents as a **punched-out ulcer** with a "wash-leather" slough at the base. It is usually painless and circular. * **Cancerous Ulcer (Incorrect):** Malignant ulcers (like Squamous Cell Carcinoma) are characterized by **everted (rolled-out) edges** due to the rapid proliferation of neoplastic cells at the margin. * **Venous Ulcer (Incorrect):** These usually have **sloping edges**. They are commonly located in the "gaiter area" (medial malleolus) and are associated with chronic venous insufficiency and skin changes like lipodermatosclerosis. **High-Yield Clinical Pearls for NEET-PG:** * **Undermined edge:** Tuberculosis. * **Punched-out edge:** Syphilis, Trophic (Neuropathic) ulcers, Vasculitic ulcers. * **Everted edge:** Squamous cell carcinoma (Marjolin’s ulcer), Epithelioma. * **Sloping edge:** Healing traumatic or venous ulcer. * **Rolled-in (Inverted) edge:** Basal Cell Carcinoma (Rodent ulcer).

Q: What is the most common type of hernia in females?

Indirect inguinal hernia. **Explanation:** The correct answer is **Indirect inguinal hernia**. This is a classic high-yield concept in surgery that often confuses students due to the anatomical predisposition of females to femoral hernias. **1. Why Indirect Inguinal Hernia is Correct:** While femoral hernias are more common in females than in males, the **indirect inguinal hernia** remains the most common type of hernia in **both sexes**. In females, the indirect hernia occurs due to the patency of the *processus vaginalis* (Nuck’s canal), allowing abdominal contents to protrude through the deep inguinal ring. Statistically, the frequency of inguinal hernias far outweighs that of femoral hernias, even in the female population. **2. Analysis of Incorrect Options:** * **Direct Inguinal Hernia:** These occur through Hesselbach’s triangle due to an acquired weakness in the abdominal wall. They are significantly less common in females compared to males. * **Femoral Hernia:** This is the "trap" option. While it is true that femoral hernias are **more common in females than in males** (due to a wider bony pelvis), they are still less common than indirect inguinal hernias in females. * **Incisional Hernia:** These occur at the site of previous surgical scars. While common post-operatively, they do not surpass the baseline incidence of indirect inguinal hernias. **Clinical Pearls for NEET-PG:** * **Most common hernia overall (M/F):** Indirect Inguinal Hernia. * **Most common hernia in females:** Indirect Inguinal Hernia. * **Hernia with the highest risk of strangulation:** Femoral Hernia (due to the rigid boundaries of the femoral canal). * **Nuck’s Canal:** The female equivalent of the processus vaginalis; its failure to obliterate leads to indirect hernias in women.

Q: Colopotomy is done to treat which of the following?

Pelvic abscess. **Explanation:** **Colpotomy** (specifically posterior colpotomy) is a surgical procedure where an incision is made through the posterior vaginal wall into the **Pouch of Douglas (Rectouterine pouch)**. 1. **Why Pelvic Abscess is Correct:** The Pouch of Douglas is the most dependent (lowest) part of the peritoneal cavity in a female. Inflammatory processes (like PID or ruptured appendicitis) often lead to the accumulation of pus in this space, forming a **pelvic abscess**. A posterior colpotomy allows for direct, gravity-dependent drainage of this abscess through the vaginal vault, avoiding a more invasive laparotomy. 2. **Why Other Options are Incorrect:** * **Ischiorectal and Perianal Abscesses:** These are types of anorectal abscesses located in the perianal skin or the ischiorectal fossa (below the pelvic floor). They are drained via **external skin incisions** (usually cruciate incisions) near the anus, not through the vaginal wall. * **Appendicular Abscess:** While a pelvic abscess can result from appendicitis, a localized appendicular abscess in the right iliac fossa is typically drained percutaneously (ultrasound-guided) or via an abdominal approach (extraperitoneal drainage). **NEET-PG High-Yield Pearls:** * **Clinical Presentation:** A pelvic abscess typically presents with swinging fever, diarrhea, and mucus discharge per rectum (due to irritation of the anterior rectal wall). * **Diagnosis:** On Per-Vaginal (PV) or Per-Rectal (PR) examination, a **tender, boggy swelling** is felt in the posterior fornix or anterior rectal wall. * **Culdocentesis:** This is the aspiration of fluid from the Pouch of Douglas via the posterior fornix, used to diagnose hemoperitoneum (e.g., ruptured ectopic pregnancy) or pus. * **Anatomical Landmark:** The incision for posterior colpotomy is made between the uterosacral ligaments.

Q: Name the incision.

Chevron incision. ***Chevron incision*** - A **bilateral subcostal incision** that extends horizontally across the upper abdomen, creating a "rooftop" or inverted V-shape appearance. - Provides excellent **exposure to the liver, gallbladder, and upper abdominal organs**, commonly used for hepatobiliary procedures and liver transplantation. *Kocher's incision* - A **right subcostal incision** that runs parallel to the right costal margin, limited to one side only. - Primarily used for **open cholecystectomy** and right upper quadrant procedures, not bilateral like the image shows. *Lanz incision* - A **transverse incision in the right iliac fossa**, positioned lower in the abdomen over McBurney's point. - Specifically designed for **appendectomy procedures**, located much lower than the subcostal region shown. *Maylard incision* - A **transverse incision in the lower abdomen** that cuts through the rectus abdominis muscles. - Used for **gynecological procedures** and lower abdominal access, positioned significantly below the costal margins.

Question 1

From which of the following sites should a biopsy NOT be taken?

Accepted Answer

When the lesion subsides on local treatment

Answer

Area with large, spontaneous enlargement

Answer

A pigmented lesion

Answer

A white plaque like lesion

Question 2

Lung volume reduction surgery is used in the management of which of the following conditions?

Accepted Answer

Emphysema

Answer

Bronchial asthma

Answer

Interstitial lung disease

Answer

Chronic bronchitis

Question 3

Which of the following procedures is associated with the worst prognosis?

Accepted Answer

Splenectomy

Answer

Cholecystectomy

Answer

Nephrectomy

Answer

Appendectomy

Question 4

What is the major disadvantage of a peripheral intravenous line?

Accepted Answer

Thrombophlebitis

Answer

Catheter-related sepsis

Answer

Damage to adjacent artery

Answer

Refeeding syndrome

Question 5

Maximum tissue reaction is associated with which suture material?

Accepted Answer

Plain catgut

Answer

Polypropylene

Answer

Polyglyconate

Answer

Polydioxanone

Question 6

A skin ulcer with undermined edges suggests which of the following conditions?

Accepted Answer

Tuberculosis

Answer

Syphilis

Answer

Cancerous ulcer

Answer

Venous ulcer

Question 7

A patient with an abdominal wall desmoid tumor should be screened for which of the following conditions?

Accepted Answer

Colonic polyps

Answer

Lung cancer

Answer

Breast cancer

Answer

Pancreatic cancer

Question 8

What is the most common type of hernia in females?

Accepted Answer

Indirect inguinal hernia

Answer

Direct inguinal hernia

Answer

Femoral hernia

Answer

Incisional hernia

Question 9

Colopotomy is done to treat which of the following?

Accepted Answer

Pelvic abscess

Answer

Ischeorectal abscess

Answer

Appendicular abscess

Answer

Perianal abscess

Question 10

Name the incision.

Accepted Answer

Chevron incision

Answer

Kocher's incision

Answer

Lanz incision

Answer

Maylard incision

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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