General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 301: Splenectomy can be curative in all of the following conditions except:

A. Spleen vein thrombosis
B. Sickle cell disease (Correct Answer)
C. Hereditary spherocytosis
D. Immune thrombocytopenic purpura (ITP)

Explanation: **Explanation:** The goal of a "curative" splenectomy is to eliminate the primary site of pathology or the site of cell destruction, thereby resolving the disease process. **Why Sickle Cell Disease (SCD) is the correct answer:** In SCD, the primary pathology is a **genetic defect in hemoglobin (HbS)** within the red blood cells, not the spleen itself. While splenectomy may be indicated for specific complications like acute splenic sequestration or a splenic abscess, it does **not** cure the underlying disease. The sickling process continues in the systemic circulation, leading to vaso-occlusive crises and organ damage elsewhere. **Analysis of Incorrect Options:** * **Splenic Vein Thrombosis:** This causes "left-sided" or "sinistral" portal hypertension, leading to gastric varices. Splenectomy is **curative** as it removes the high-pressure venous outflow tract, preventing further variceal bleeding. * **Hereditary Spherocytosis:** The spleen is the primary site where the abnormal, rigid spherocytes are trapped and destroyed. Splenectomy is the **treatment of choice** (usually after age 5) as it stops the hemolysis and prevents gallstone formation, effectively "curing" the clinical manifestations. * **Immune Thrombocytopenic Purpura (ITP):** The spleen is both the site of anti-platelet antibody production and the site of platelet destruction by macrophages. Splenectomy is **curative** in approximately 70-80% of chronic cases refractory to medical therapy. **High-Yield Clinical Pearls for NEET-PG:** 1. **Hereditary Spherocytosis:** Splenectomy is the only definitive treatment; always perform a concomitant cholecystectomy if gallstones are present. 2. **Vaccination:** Post-splenectomy patients must be vaccinated against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) ideally 2 weeks before elective surgery. 3. **Blood Picture:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on a peripheral smear post-splenectomy.

Question 302: Which of the following statements about breast cancer is FALSE?

A. The most common route of spread is hematogenous.
B. The most common area involved is the upper inner quadrant. (Correct Answer)
C. The most common site of metastasis is bone.
D. The most common cause of death is malignant pleural effusion.

Explanation: **Explanation:** This question tests your knowledge of the epidemiology and natural history of breast cancer. **1. Why Option B is the Correct (False) Statement:** The most common site for breast cancer is the **Upper Outer Quadrant (UOQ)**, accounting for approximately **45-50%** of cases. This is primarily because the UOQ contains the greatest volume of glandular breast tissue (the tail of Spence). The statement claiming the upper inner quadrant is the most common is factually incorrect. **2. Analysis of Other Options:** * **Option A (True):** While lymphatic spread to axillary nodes is the most common early route, systemic (hematogenous) spread is the primary mechanism for distant metastasis and is the ultimate determinant of prognosis. * **Option C (True):** Bone is the most common site of distant metastasis in breast cancer (specifically osteolytic lesions, though prostate cancer is typically osteoblastic). * **Option D (True):** While breast cancer itself is the primary disease, the most common immediate cause of mortality in these patients is respiratory failure resulting from **malignant pleural effusion** or extensive pulmonary metastasis. **Clinical Pearls for NEET-PG:** * **Quadrant Distribution:** UOQ (50%) > Central/Subareolar (20%) > UIQ (15%) > LOQ (10%) > LIQ (5%). * **Most Common Histology:** Invasive Ductal Carcinoma (NOS) is the most common type. * **Lymphatic Drainage:** 75% of lymph drains into the axillary nodes (Level I, II, and III). * **Batson’s Plexus:** Explains the route of metastasis to the vertebrae without involving the lungs.

Question 303: All of the following statements regarding the repair of groin hernias are true EXCEPT?

A. Lichtenstein tension-free repair has a low recurrence rate.
B. Total extraperitoneal (TEP) repair is an extraperitoneal approach for laparoscopic repair of groin hernias.
C. In Shouldice repair, non-absorbable mesh is used. (Correct Answer)
D. The surgery can be performed under local anesthesia in selected cases.

Explanation: **Explanation** The correct answer is **C** because the **Shouldice repair is a pure tissue-based (suture) repair**, not a mesh repair. It involves a four-layer imbrication of the posterior wall of the inguinal canal using continuous non-absorbable sutures (traditionally stainless steel or polypropylene). It is considered the "gold standard" among non-mesh repairs due to its low recurrence rate. **Analysis of other options:** * **Option A:** The **Lichtenstein repair** is the current gold standard for open inguinal hernia repair. It is a "tension-free" technique using a synthetic mesh, which significantly reduces recurrence rates compared to traditional primary tissue repairs. * **Option B:** **TEP (Total Extraperitoneal)** repair is a laparoscopic technique where the preperitoneal space is developed without entering the peritoneal cavity. This contrasts with TAPP (Transabdominal Preperitoneal) repair, which involves entering the abdomen. * **Option D:** Open repairs (like Lichtenstein or Shouldice) can be safely performed under **local anesthesia** with sedation, which is often preferred for elderly patients or those with significant comorbidities to avoid the risks of general anesthesia. **High-Yield Clinical Pearls for NEET-PG:** * **Nerve most commonly injured** during open hernia surgery: **Ilioinguinal nerve**. * **Nerve most commonly injured** during laparoscopic repair: **Lateral femoral cutaneous nerve** (leading to meralgia paresthetica). * **Triangle of Pain:** Located lateral to the spermatic vessels; contains the femoral branch of the genitofemoral nerve and lateral femoral cutaneous nerve. Avoid tacking mesh here. * **Triangle of Doom:** Located between the vas deferens and spermatic vessels; contains the **external iliac artery and vein**. Avoid tacking mesh here.

Question 304: What is the most common cause of peritonitis in adult males?

A. Abdominal tuberculosis
B. Duodenal ulcer perforation (Correct Answer)
C. Enteric perforation
D. Perforated appendix

Explanation: **Explanation:** The correct answer is **Duodenal Ulcer (DU) Perforation**. In the context of adult males, especially in the Indian subcontinent, perforated peptic ulcer (specifically duodenal) remains the most common cause of secondary peritonitis. **1. Why Duodenal Ulcer Perforation is Correct:** Peritonitis is most frequently caused by the perforation of a hollow viscus. While the incidence of peptic ulcer disease has decreased with the use of PPIs and *H. pylori* eradication, it still accounts for the majority of surgical peritonitis cases in adult males. The perforation usually occurs in the first part of the duodenum (anterior wall), leading to the rapid release of acidic gastric contents into the peritoneal cavity, causing chemical peritonitis followed by bacterial infection. **2. Analysis of Incorrect Options:** * **Abdominal Tuberculosis:** While common in India, it usually presents as chronic peritonitis (ascitic or plastic variety) rather than acute perforative peritonitis. * **Enteric (Typhoid) Perforation:** This is a significant cause in developing countries, typically occurring in the 3rd week of typhoid fever. However, its overall incidence is lower than DU perforation. * **Perforated Appendix:** This is the most common cause of acute abdomen and peritonitis in **children and young adolescents**, but it ranks second to DU perforation in the general adult male population. **Clinical Pearls for NEET-PG:** * **Gas under diaphragm:** Seen in ~70-80% of DU perforations on an upright X-ray. * **Most common site of DU perforation:** Anterior wall of the 1st part of the duodenum. * **Gold Standard Treatment:** Emergency laparotomy and **Graham’s Omental Patch** repair. * **Valentino’s Syndrome:** Perforated DU fluid tracking down the right paracolic gutter, mimicking acute appendicitis.

Question 305: What is true about Marjolin's ulcer?

A. Ulcer over a scar (Correct Answer)
B. Rapid growth
C. Rodent ulcer
D. Painful

Explanation: **Explanation:** **Marjolin’s ulcer** refers to a specific type of **Squamous Cell Carcinoma (SCC)** that arises in areas of chronic inflammation, long-standing scars, or non-healing wounds. 1. **Why Option A is Correct:** The hallmark of a Marjolin’s ulcer is its development over a **pre-existing scar**, most commonly a **post-burn contracture scar**. It can also occur in chronic osteomyelitis sinuses, venous ulcers, or vaccination scars. The malignant transformation occurs due to constant irritation and poor lymphatic drainage in the scarred tissue. 2. **Why Other Options are Incorrect:** * **B. Rapid growth:** Marjolin’s ulcers are typically characterized by a **slow growth rate** and a very long latent period (averaging 25–30 years) between the initial injury and the onset of malignancy. * **C. Rodent ulcer:** This is a clinical term for **Basal Cell Carcinoma (BCC)**, which typically occurs on sun-exposed skin (above the line joining the tragus to the angle of the mouth). Marjolin’s ulcer is histologically a Squamous Cell Carcinoma. * **D. Painful:** Interestingly, Marjolin’s ulcers are characteristically **painless** because the scar tissue in which they develop is devoid of sensory nerve fibers. **NEET-PG High-Yield Pearls:** * **Most common site:** Lower limb (due to chronic venous ulcers or burn scars). * **Lymphadenopathy:** Usually absent initially because the dense scar tissue acts as a barrier to lymphatic spread. However, if it does spread, it is highly aggressive. * **Diagnosis:** Confirmed by edge biopsy. * **Treatment:** Wide local excision (with a 2 cm margin) or amputation.

Question 306: During splenectomy, at which level are the splenic vessels typically ligated?

A. Near the splenic hilum
B. At the superior border of the pancreas (Correct Answer)
C. At the inferior border of the pancreas
D. Midway between the splenic hilum and the superior border of the pancreas

Explanation: **Explanation:** The **splenic artery** is a branch of the celiac trunk that runs a tortuous course along the **superior border of the pancreas**. In a standard splenectomy, the vessels are typically ligated at this level to ensure a controlled, bloodless field and to allow for the separate ligation of the artery and vein. **Why Option B is Correct:** Ligating the splenic artery at the superior border of the pancreas (often near the tail) is the preferred surgical approach. This allows the surgeon to control the arterial inflow before manipulating the spleen itself, which is particularly crucial in cases of splenomegaly or trauma to prevent excessive blood loss. **Why Other Options are Incorrect:** * **Option A (Near the splenic hilum):** While the vessels eventually enter the hilum, ligating them only at this point is risky. The vessels often divide into multiple segmental branches just before the hilum; ligating here increases the risk of missing a branch or causing significant bleeding during dissection. * **Option C (Inferior border of the pancreas):** This is anatomically incorrect. The splenic vessels run along the superior, not the inferior, margin of the pancreas. * **Option D (Midway):** This is not a standard surgical landmark. Surgeons rely on fixed anatomical structures like the pancreatic borders for consistent vessel identification. **Clinical Pearls for NEET-PG:** * **Tail of the Pancreas:** The tail of the pancreas lies within the **splenorenal ligament** and often reaches the splenic hilum. Great care must be taken during ligation to avoid injuring the pancreatic tail, which can lead to a pancreatic fistula. * **Order of Ligation:** In elective splenectomy, the **splenic artery** is usually ligated first to allow the spleen to "auto-transfuse" its blood back into the circulation before the vein is ligated. * **Ligaments:** Remember that the splenic vessels travel within the **splenorenal (lienorenal) ligament**, while the short gastric vessels travel in the **gastrosplenic ligament**.

Question 307: Which tumor may occur in the residual breast or overlying skin following wide local excision and radiotherapy?

A. Leiomyosarcoma
B. Squamous cell carcinoma
C. Basal cell carcinoma
D. Angiosarcoma (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. Angiosarcoma** **Reasoning:** Angiosarcoma of the breast is a rare but highly aggressive malignant tumor of the vascular endothelium. It occurs in two distinct clinical settings: 1. **Primary Angiosarcoma:** Occurs sporadically in younger women (30–40s) without prior risk factors. 2. **Secondary Angiosarcoma (Radiation-Induced):** This is the specific entity described in the question. It occurs in the residual breast tissue or overlying skin following **Breast Conserving Surgery (Wide Local Excision) and Radiotherapy**. The typical latency period is **5–10 years** post-radiation. It often presents as painless, bluish-red skin discoloration or nodules that can be mistaken for simple bruising. **Why Incorrect Options are Wrong:** * **A. Leiomyosarcoma:** This is a malignant tumor of smooth muscle. While it can occur in the skin or retroperitoneum, it is not a recognized complication of breast radiotherapy. * **B & C. Squamous and Basal Cell Carcinoma:** These are common skin cancers primarily associated with UV radiation (sun exposure). While chronic radiation dermatitis can theoretically predispose to SCC, Angiosarcoma is the classic, high-yield association specifically linked to post-mastectomy/post-lumpectomy radiation and lymphedema. **High-Yield Clinical Pearls for NEET-PG:** * **Stewart-Treves Syndrome:** This refers to angiosarcoma arising in a limb affected by **chronic lymphedema** (classically the arm following a radical mastectomy with axillary lymph node dissection). * **Latency:** Radiation-induced angiosarcoma has a shorter latency (approx. 7 years) compared to other radiation-induced solid tumors (20+ years). * **Diagnosis:** Requires a full-thickness skin biopsy. * **Prognosis:** Very poor due to high rates of local recurrence and hematogenous metastasis (especially to the lungs).

Question 308: Richter's hernia can be seen in all hernias except:

A. Femoral
B. Obturator
C. Epigastric (Correct Answer)
D. Paraumbilical

Explanation: **Explanation:** **Richter’s Hernia** is a specific type of hernia where only a **portion of the circumference** of the bowel wall (usually the antimesenteric border) becomes trapped and strangulated within the hernial sac. Because the entire lumen is not occluded, patients may present with strangulation and gangrene without signs of intestinal obstruction, making it clinically deceptive. **Why Epigastric is the Correct Answer:** Richter’s hernia occurs in hernial orifices that are **small, rigid, and have firm margins**. * **Epigastric hernias** occur through a defect in the linea alba. These defects are usually very small and typically contain only **pre-peritoneal fat** (lipoma of the linea alba). It is extremely rare for a bowel loop to enter an epigastric defect; therefore, a Richter’s variant is practically never seen here. **Analysis of Other Options:** * **Femoral Hernia (A):** This is the **most common site** for a Richter’s hernia due to the narrow, rigid boundaries of the femoral canal (Lacunar ligament). * **Obturator Hernia (B):** The obturator canal is a small, inelastic opening, making it a classic site for Richter’s presentation. * **Paraumbilical Hernia (D):** While less common than femoral, the fibrous boundaries of the umbilical ring can trap a partial circumference of the bowel. **NEET-PG High-Yield Pearls:** 1. **Most common site:** Femoral canal. 2. **Clinical Paradox:** Gangrene and perforation can occur **without** features of intestinal obstruction (patient may still pass flatus/feces). 3. **Commonly involved segment:** Terminal ileum. 4. **Littre’s Hernia:** A hernia containing a Meckel’s diverticulum (often confused with Richter’s). 5. **Maydl’s Hernia:** Retrograde strangulation (W-shaped loop) where the loop inside the abdomen becomes gangrenous.

Question 309: Which of the following is common in all forms of shock?

A. Sepsis
B. Hypovolemia
C. Vasoconstriction
D. Impaired tissue perfusion (Correct Answer)

Explanation: **Explanation:** **1. Why "Impaired tissue perfusion" is correct:** Shock is fundamentally defined as a state of **acute circulatory failure** where the oxygen delivery to the tissues is insufficient to meet the metabolic demands. Regardless of the underlying cause (be it pump failure, fluid loss, or infection), the common denominator in all forms of shock is **impaired tissue perfusion**. This leads to cellular hypoxia, a shift from aerobic to anaerobic metabolism, lactic acidosis, and eventually, multi-organ dysfunction syndrome (MODS). **2. Why the other options are incorrect:** * **Sepsis (A):** This is the etiology specifically for *Septic Shock* (a type of distributive shock). It is not present in hypovolemic, cardiogenic, or obstructive shock. * **Hypovolemia (B):** This refers to a decrease in intravascular volume. While it is the hallmark of *Hypovolemic Shock*, other forms like cardiogenic shock may actually present with fluid overload (hypervolemia). * **Vasoconstriction (C):** This is a compensatory mechanism seen in "Cold Shock" (Hypovolemic and Cardiogenic). However, in "Warm Shock" (early Septic/Distributive shock), there is widespread **vasodilation** rather than vasoconstriction. Therefore, it is not common to all types. **3. NEET-PG High-Yield Pearls:** * **The "Gold Standard" for monitoring tissue perfusion:** Serum Lactate levels (rising lactate indicates anaerobic metabolism). * **Mixed Venous Oxygen Saturation ($SvO_2$):** Usually decreased in most shocks, but may be **normal or high** in Septic Shock due to impaired oxygen extraction at the tissue level. * **End-organ markers of shock:** Oliguria (Urine output <0.5 ml/kg/hr), altered mental status, and metabolic acidosis. * **Distributive Shock** is the only type where Systemic Vascular Resistance (SVR) is primarily **decreased**.

Question 310: Elevators should not be used to remove the palatal root of an?

A. Upper incisor
B. Upper canine
C. Upper premolar
D. Upper molar (Correct Answer)

Explanation: **Explanation:** The use of elevators for the extraction of the palatal root of an **upper molar** is contraindicated due to the specific anatomical relationship between the maxillary molars and the **maxillary sinus (antrum)**. The palatal root of the upper molar is often long, divergent, and located in close proximity to the floor of the maxillary sinus. Applying apical force with an elevator in this region carries a high risk of displacing the root fragment into the sinus cavity, leading to complications such as **oro-antral communication (OAC)** or acute sinusitis. Instead of elevators, specialized root forceps or a surgical approach (creating a flap) are preferred to ensure controlled retrieval. **Analysis of Incorrect Options:** * **Upper Incisors (A) and Canines (B):** These are single-rooted teeth. While elevators are used cautiously, there is no maxillary sinus involvement in the anterior maxilla to pose a displacement risk similar to molars. * **Upper Premolars (C):** Although the second premolar is close to the sinus, the risk is significantly lower than with the three-rooted upper molars, where the palatal root is specifically angled toward the antral floor. **Clinical Pearls for NEET-PG:** * **Maxillary Sinus Proximity:** The first molar is the tooth most commonly associated with the maxillary sinus. * **Complication:** If a root is displaced into the sinus, the initial management involves a radiograph to locate it; if it cannot be retrieved via the socket, a **Caldwell-Luc procedure** may be required. * **Rule of Thumb:** Never apply apical pressure to a root tip that lacks a bony "stop" or is adjacent to a vital cavity (sinus or mandibular canal).

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