General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 451: What is the most common infection of the hand?

A. Acute paronychia (Correct Answer)
B. Felon
C. Web space infection
D. Palmar abscess

Explanation: **Explanation:** **Acute Paronychia** is the most common infection of the hand. It is a localized infection of the nail fold (eponychium), typically occurring after minor trauma such as nail-biting, manicuring, or hangnails. The most common causative organism is *Staphylococcus aureus*. It presents with pain, swelling, and erythema around the nail base, which may progress to abscess formation. **Analysis of Options:** * **Felon (Option B):** This is the second most common hand infection. It is a subcutaneous abscess of the distal pulp space of the finger. While serious due to the risk of compartment syndrome and osteomyelitis, its incidence is lower than paronychia. * **Web Space Infection (Option C):** Also known as a "collar-stud abscess," this involves the subcutaneous space between the fingers. It is less common and usually results from infected skin cracks or blisters. * **Palmar Abscess (Option D):** These are deep space infections (e.g., mid-palmar or thenar space). They are clinically significant but much rarer than superficial infections like paronychia. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment:** Early paronychia is managed with warm soaks and antibiotics. If fluctuant, surgical drainage (eponychial fold elevation) is required. * **Chronic Paronychia:** Often fungal (*Candida albicans*) and seen in individuals with frequent water exposure (e.g., dishwashers). * **Kanavel’s Signs:** A classic triad/quadrad used to diagnose **Flexor Tenosynovitis** (another high-yield hand infection), not paronychia. * **Herpetic Whitlow:** Caused by HSV; it must be distinguished from a felon as incision and drainage are contraindicated in viral infections.

Question 452: Splenectomy is useful in:

A. Hemophilia
B. Polycythemia
C. Hereditary Spherocytosis (Correct Answer)
D. Thalassemia

Explanation: **Explanation:** **Hereditary Spherocytosis (HS)** is the correct answer because it is the most common indication for elective splenectomy in children. In HS, a defect in red blood cell (RBC) membrane proteins (like spectrin or ankyrin) leads to the formation of spherical, rigid cells. These spherocytes are trapped and destroyed by the splenic macrophages in the cords of Billroth. Splenectomy does not cure the membrane defect, but it significantly increases RBC lifespan, eliminates chronic hemolysis, and prevents the formation of pigment gallstones. **Why other options are incorrect:** * **Hemophilia:** This is a clotting factor deficiency (Factor VIII or IX). Splenectomy has no role in management as it does not affect factor levels. * **Polycythemia:** This involves an overproduction of RBCs. Management focuses on phlebotomy or myelosuppressive agents. Splenectomy is generally avoided as it may worsen the thrombotic risk already present in these patients. * **Thalassemia:** While splenectomy is sometimes performed in Thalassemia Major to reduce transfusion requirements (if hypersplenism develops), it is not the primary treatment and is less "curative" for the symptoms compared to its role in HS. **NEET-PG High-Yield Pearls:** * **Timing:** In HS, splenectomy is ideally delayed until after age 5 to reduce the risk of **OPSI** (Overwhelming Post-Splenectomy Infection). * **Prophylaxis:** Patients must receive vaccinations against *S. pneumoniae, H. influenzae,* and *N. meningitidis* at least 2 weeks before elective surgery. * **Post-op Blood Picture:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on a peripheral smear post-splenectomy. * **Associated Procedure:** Always screen for gallstones (cholelithiasis) in HS patients; if present, a concomitant cholecystectomy is performed.

Question 453: Marjolin's ulcer is:

A. Rapidly growing neoplasm
B. Basal cell carcinoma
C. Squamous cell carcinoma (Correct Answer)
D. Adenocarcinoma

Explanation: **Explanation:** **Marjolin’s ulcer** refers to a malignancy arising in chronic non-healing wounds, scars, or inflammatory tracts. The underlying medical concept is that chronic irritation and repeated cycles of tissue repair in areas of poor vascularity (like a burn scar) lead to malignant transformation. 1. **Why Option C is Correct:** The vast majority (approx. 95%) of Marjolin’s ulcers are histologically **Squamous Cell Carcinomas (SCC)**. These arise from the epithelial cells at the edges of chronic ulcers or scars. While they are generally slow-growing initially, once they penetrate the dense scar tissue, they become highly aggressive with a higher rate of metastasis compared to typical SCC. 2. **Why Other Options are Incorrect:** * **Option A:** While Marjolin’s ulcer is aggressive, the term "rapidly growing" is misleading. It typically has a long latent period (average 25–30 years) before malignancy develops. * **Option B:** Basal Cell Carcinoma (BCC) is the second most common type but is significantly rarer than SCC in this context. * **Option D:** Adenocarcinoma arises from glandular tissue; Marjolin’s ulcer arises from the squamous epithelium of the skin. **Clinical Pearls for NEET-PG:** * **Most common site:** Lower limbs (specifically over joints). * **Most common predisposing factor:** Post-burn scars (cicatrix). * **Characteristic feature:** It is typically **painless** because the scar tissue lacks sensory nerve fibers. * **Lymphadenopathy:** Often absent initially because the dense scar tissue acts as a barrier to lymphatic spread; however, if present, it signifies a poor prognosis. * **Diagnosis:** Edge biopsy is mandatory for any chronic ulcer showing new growth, everted edges, or bleeding.

Question 454: What is the use of this instrument?

A. Create pneumoperitoneum by open method (Correct Answer)
B. Drain hydatid cyst
C. Suction cannula
D. None of the above

Explanation: ***Create pneumoperitoneum by open method*** - This instrument is a **Hasson trocar**, specifically designed for the **open (Hasson) technique** of creating pneumoperitoneum in laparoscopic surgery. - Features include a **blunt obturator**, **conical sleeve**, and **suture retention wings** that distinguish it from other laparoscopic instruments. *Drain hydatid cyst* - Hydatid cyst drainage requires specialized **aspiration needles** or **catheter systems**, not a trocar with suture wings. - The **blunt tip** and **wide bore** of this instrument make it unsuitable for precise cyst aspiration procedures. *Suction cannula* - Suction cannulas are typically **straight, narrow tubes** without the conical sleeve and suture retention features seen here. - This instrument lacks the **continuous suction port** and **flexible connection** characteristic of suction devices. *None of the above* - The instrument clearly shows the **distinctive features** of a Hasson trocar used in laparoscopic surgery. - The **suture retention wings** and **blunt obturator design** are pathognomonic for pneumoperitoneum creation by open method.

Question 455: Primary peritonitis is more common in females because?

A. The ostia of the Fallopian tubes communicate with the abdominal cavity. (Correct Answer)
B. The peritoneum overlies the uterus.
C. There is a rupture of functional ovarian cysts.
D. None of the above.

Explanation: **Explanation:** **1. Why Option A is Correct:** Primary peritonitis (spontaneous bacterial peritonitis) occurs when the peritoneal cavity is infected without an evident intra-abdominal source of sepsis (like a perforated viscus). In females, the **fimbriated ends (ostia) of the Fallopian tubes** provide a unique anatomical pathway. Unlike the male peritoneal cavity, which is a completely closed sac, the female peritoneal cavity communicates with the exterior environment via the fallopian tubes, uterus, and vagina. This allows for the **ascending migration of bacteria** from the genital tract into the peritoneum, making primary peritonitis significantly more common in females. **2. Why Other Options are Incorrect:** * **Option B:** While the peritoneum does overlie the uterus (forming the pouch of Douglas and broad ligaments), this is merely a structural covering and does not provide a portal for bacterial entry. * **Option C:** Rupture of a functional ovarian cyst usually causes hemoperitoneum or chemical irritation, leading to localized pain, but it is not a standard mechanism for primary bacterial peritonitis. **3. NEET-PG High-Yield Pearls:** * **Most Common Organism:** In children (especially those with nephrotic syndrome), *Streptococcus pneumoniae* is the most common cause. In adults with cirrhosis, *E. coli* is the most common. * **Clinical Presentation:** It often presents with diffuse abdominal pain and fever. A key diagnostic feature is a **low protein count** in the ascitic fluid and a high polymorphonuclear (PMN) leukocyte count (>250 cells/mm³). * **Management:** Unlike secondary peritonitis, primary peritonitis is primarily managed **medically with antibiotics** (e.g., third-generation cephalosporins) rather than surgery.

Question 456: Petersen hernia is defined as:

A. An internal hernia located behind the Roux-en-Y limb (Correct Answer)
B. An internal hernia through the transverse mesocolon
C. A cervical hernia
D. A hernia through the epiploic foramen

Explanation: **Explanation:** **Petersen’s Hernia** is a type of internal hernia that occurs through **Petersen’s space**. This space is a potential defect created between the mesentery of the Roux-en-Y limb (alimentary limb) and the transverse mesocolon. It is a well-known complication following gastric bypass surgery (RYGB) or any Roux-en-Y reconstruction. * **Why Option A is Correct:** In a Roux-en-Y configuration, the lifted jejunal limb creates a gap behind it. If this space is not surgically closed, loops of the small bowel can herniate through it, leading to bowel obstruction, ischemia, or necrosis. * **Why Option B is Incorrect:** A hernia through the transverse mesocolon is specifically called a **Transmesocolic hernia**. This occurs if the defect created to pass the Roux limb (in retrocolic repairs) is not closed. * **Why Option C is Incorrect:** Cervical hernias are not a standard classification in general surgery; hernias in the neck region are usually related to discs (orthopedics) or lung apices (Sibson’s fascia). * **Why Option D is Incorrect:** A hernia through the epiploic foramen is known as a **Winslow’s foramen hernia**. **Clinical Pearls for NEET-PG:** 1. **Incidence:** Petersen’s hernia is more common in **Laparoscopic** Roux-en-Y Gastric Bypass compared to open surgery because laparoscopy results in fewer adhesions, allowing the bowel to move more freely into potential spaces. 2. **Presentation:** Patients often present with intermittent, "colicky" post-prandial abdominal pain before progressing to acute intestinal obstruction. 3. **Imaging:** On CT scan, look for the **"Swirl sign"** (torsion of the mesenteric vessels). 4. **Prevention:** The standard of care is the meticulous closure of both Petersen’s space and the mesenteric defect during the primary surgery.

Question 457: Which of the following statements regarding direct inguinal hernia is true?

A. More common in women
B. Located medial to the inferior epigastric artery (Correct Answer)
C. Often protrudes into the scrotum
D. The sac is opened during reduction in surgery

Explanation: ### Explanation **Correct Answer: B. Located medial to the inferior epigastric artery** **Underlying Medical Concept:** The anatomical landmark that differentiates direct from indirect inguinal hernias is the **inferior epigastric artery**. Direct inguinal hernias occur through a weakness in the posterior wall of the inguinal canal, specifically within **Hesselbach’s Triangle**. The boundaries of this triangle are the lateral border of the rectus abdominis (medial), the inguinal ligament (inferior), and the **inferior epigastric artery (lateral)**. Therefore, a direct hernia always protrudes **medial** to these vessels. **Analysis of Incorrect Options:** * **A. More common in women:** This is incorrect. Both direct and indirect hernias are significantly more common in men. However, the most common hernia in females is still the indirect inguinal hernia (though femoral hernias are more common in women than in men). * **C. Often protrudes into the scrotum:** This is a characteristic of **indirect** hernias. Indirect hernias follow the path of the spermatic cord through the internal ring and are more likely to reach the scrotum. Direct hernias rarely enter the scrotum because they protrude directly forward through the fascia transversalis. * **D. The sac is opened during reduction:** In direct hernia surgery, the sac is usually **not opened**. It is simply inverted (imbricated) or pushed back into the preperitoneal space. Opening the sac increases the risk of injury to the bladder, which often forms the medial wall of the sac (sliding hernia). **High-Yield Clinical Pearls for NEET-PG:** * **Hesselbach’s Triangle:** The site of direct hernias. * **Coverings:** A direct hernia is covered by the external spermatic fascia but **not** the internal spermatic fascia (as it does not pass through the deep ring). * **Nerve at Risk:** The **ilioinguinal nerve** is the most common nerve injured during open inguinal hernia repair. * **Malgaigne’s Bulge:** A clinical sign where a direct hernia appears as a diffuse globular bulge that disappears immediately upon lying down.

Question 458: Which of the following is an evidence that splenectomy might benefit a patient with idiopathic thrombocytopenic purpura?

A. A significantly enlarged spleen
B. A high reticulocyte count
C. Patient's age less than five years
D. An increase in platelet count on corticosteroid therapy (Correct Answer)

Explanation: In **Immune Thrombocytopenic Purpura (ITP)**, the pathophysiology involves the production of IgG autoantibodies against platelet surface antigens (GPIIb/IIIa). These antibody-coated platelets are subsequently destroyed by splenic macrophages. ### Why Option D is Correct The response to **corticosteroids** is the single best predictor of a successful outcome following splenectomy. Corticosteroids work by decreasing antibody production and reducing the affinity of splenic macrophages for antibody-coated platelets. If a patient’s platelet count rises with steroids, it demonstrates that the thrombocytopenia is indeed due to peripheral destruction (primarily in the spleen) rather than a bone marrow production defect. Therefore, removing the primary site of destruction (the spleen) is highly likely to result in a sustained remission. ### Why Other Options are Incorrect * **A. Significantly enlarged spleen:** In ITP, the spleen is typically **not palpable**. If significant splenomegaly is present, a clinician should investigate other causes of thrombocytopenia, such as portal hypertension or leukemia. * **B. High reticulocyte count:** This indicates a marrow response to anemia (e.g., from bleeding or hemolysis), but it does not predict the success of a splenectomy in treating the underlying platelet destruction. * **C. Age less than five years:** Most children with ITP have an acute, self-limiting course that resolves spontaneously. Splenectomy is generally avoided in children under five due to the high risk of **Overwhelming Post-Splenectomy Infection (OPSI)**. ### NEET-PG High-Yield Pearls * **Indication for Splenectomy:** Failure of medical management (steroids/IVIG) or requirement of high-dose steroids to maintain safe platelet counts. * **Most common site of accessory spleen:** Splenic hilum (must be searched for during surgery to prevent recurrence). * **Vaccination Protocol:** Immunize against *H. influenzae*, *N. meningitidis*, and *S. pneumoniae* at least **2 weeks before** elective splenectomy.

Question 459: Which of the following is NOT true about the components separation technique?

A. It is associated with a high wound infection risk.
B. Ramirez first described the technique.
C. It has a recurrence rate of around 20%.
D. None of the above statements are true. (Correct Answer)

Explanation: The **Components Separation Technique (CST)**, first described by **Oscar Ramirez in 1990**, is a surgical method used to repair large midline ventral hernias by mobilizing the abdominal wall layers to achieve tension-free closure. ### **Explanation of the Correct Answer** The correct answer is **D (None of the above statements are true)** because all the individual statements (A, B, and C) are actually **correct** facts regarding the technique. In the context of a "Which is NOT true" question, if all options are true, "None of the above" becomes the logical choice. ### **Analysis of Options** * **Option A (True):** Traditional "open" CST involves creating large subcutaneous flaps to access the musculature. This disrupts the perforating blood vessels, leading to significant skin ischemia and a **high wound infection/complication rate (up to 40-50%)**. * **Option B (True):** The technique was indeed first described by **Ramirez**. It involves the longitudinal incision of the **external oblique aponeurosis** lateral to the rectus sheath, allowing the rectus muscle to be moved medially. * **Option C (True):** While CST is effective for large defects, it still carries a significant **recurrence rate of approximately 10-20%**, especially if performed without mesh reinforcement (Component Separation + Mesh is now the gold standard). ### **NEET-PG High-Yield Pearls** * **The Goal:** To achieve midline closure for defects up to 10 cm (upper abdomen), 20 cm (mid-abdomen), and 6 cm (lower abdomen). * **The Maneuver:** Release of the **External Oblique** muscle is the most common step. The internal oblique and transversus abdominis are usually preserved to maintain abdominal wall integrity. * **Modern Variation:** To reduce the wound infection risk mentioned in Option A, **Endoscopic Component Separation** or "Perforator-sparing" techniques are now preferred. * **TAR (Transversus Abdominis Release):** A newer "posterior" component separation technique that is frequently tested as an alternative to the Ramirez (anterior) technique.

Question 460: What is the recommended treatment for a strangulated hernia?

A. Observation
B. Immediate surgery (Correct Answer)
C. Manual reduction
D. Analgesics

Explanation: **Explanation:** A **strangulated hernia** is a surgical emergency where the blood supply to the herniated contents (usually bowel or omentum) is compromised, leading to ischemia, gangrene, and potential perforation. **Why "Immediate Surgery" is Correct:** The primary goal in strangulation is to restore blood flow or resect non-viable tissue. Once strangulation is suspected—characterized by a tense, tender, irreducible swelling with overlying skin changes and signs of intestinal obstruction—**immediate surgical exploration** is mandatory. Delaying surgery increases the risk of bowel necrosis, peritonitis, and sepsis, significantly raising morbidity and mortality rates. **Why Other Options are Incorrect:** * **Observation:** This is contraindicated as strangulation is a life-threatening condition that will not resolve spontaneously. * **Manual Reduction (Taxis):** This is **strictly contraindicated** in strangulated hernias. Forcing a potentially gangrenous bowel loop back into the peritoneal cavity can lead to "reduction en masse" or cause generalized peritonitis (reduction of necrotic bowel). * **Analgesics:** While pain management is part of supportive care, it does not treat the underlying vascular compromise and may mask worsening clinical signs. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Triad:** Irreducibility + Tenderness + Lack of cough impulse. * **Richter’s Hernia:** Only a part of the bowel wall is trapped; it can strangulate without causing complete intestinal obstruction. * **Maydl’s Hernia:** A "W-shaped" loop where the strangulated portion is located inside the abdomen, not in the hernia sac. * **Management Tip:** If a strangulated hernia reduces spontaneously during induction of anesthesia, the surgeon must still perform a laparotomy/laparoscopy to inspect the viability of the reduced bowel segment.

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Wound Healing and Care

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Surgical Infections

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Fluid and Electrolyte Management

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Nutrition in Surgical Patients

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Hemostasis and Blood Transfusion

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Surgical Instruments and Equipment

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Sutures and Stapling Devices

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Minimal Access Surgery Principles

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Surgical Complications

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Anesthesia Principles for Surgeons

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Surgical Oncology Principles

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Evidence-Based Surgery

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