General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 531: Which of the following is NOT a cause for burst abdomen?

A. Abdominal operation lasting more than two hours (Correct Answer)
B. Incomplete suture
C. Infection
D. Poor general condition of patient

Explanation: **Explanation:** Burst abdomen (abdominal wound dehiscence) is a serious postoperative complication where the layers of the abdominal wall separate. The causes are generally categorized into **local factors** and **systemic (patient) factors**. **Why Option A is the Correct Answer:** While prolonged surgery can increase the risk of surgical site infection, an **operation lasting more than two hours** is not a direct, independent cause of burst abdomen. In clinical practice, many complex abdominal surgeries (like Whipple’s or total gastrectomy) routinely exceed two hours without resulting in dehiscence, provided the closure technique and patient factors are optimized. **Analysis of Incorrect Options:** * **Incomplete Suture (B):** This is a critical technical factor. If the suture bites are too small, too far apart, or if the knots slip, the mechanical integrity of the wound is lost, leading to immediate dehiscence. * **Infection (C):** Infection is the most common local cause. It leads to tissue friability and enzymatic degradation of collagen, which weakens the wound and prevents proper healing. * **Poor General Condition (D):** Systemic factors such as malnutrition (hypoproteinemia), anemia, vitamin C deficiency, jaundice, and chronic steroid use significantly impair collagen synthesis and wound tensile strength. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** Burst abdomen typically occurs between the **5th and 8th postoperative day**. * **The "Pink Fluid" Sign:** The earliest clinical sign is a **serosanguinous (pinkish) discharge** from the wound. * **Most Common Cause:** Technical failure (improper suturing) is often cited as the leading cause. * **Management:** Immediate management involves covering the bowel with sterile saline-soaked gauze, followed by emergency re-closure using **tension sutures (interrupted mass closure)**.

Question 532: What is the most common type of hernia in the young age group?

A. Femoral hernia
B. Direct inguinal hernia
C. Indirect inguinal hernia (Correct Answer)
D. Umbilical hernia

Explanation: ### Explanation **Correct Answer: C. Indirect inguinal hernia** **Why it is correct:** The **Indirect Inguinal Hernia** is the most common type of hernia across **all age groups and both sexes**, but it is particularly predominant in the young. The underlying pathophysiology is a **congenital defect**: the failure of the **processus vaginalis** to obliterate. This creates a pre-formed sac that enters the inguinal canal through the deep inguinal ring, lateral to the inferior epigastric vessels. In infants and young adults, this is almost always the cause of a groin lump. **Why the other options are incorrect:** * **Femoral hernia:** While more common in females than males, it is rare in the young. It typically occurs in elderly females due to a wide femoral canal and increased intra-abdominal pressure. * **Direct inguinal hernia:** This is an **acquired** hernia caused by weakness in the posterior wall of the inguinal canal (Hesselbach’s triangle). It is primarily seen in the elderly due to age-related muscle atrophy and chronic strain. * **Umbilical hernia:** While common in neonates, most congenital umbilical hernias resolve spontaneously by age 2. They are less common than inguinal hernias in the overall "young age group" population. **NEET-PG High-Yield Pearls:** * **Most common hernia overall:** Indirect Inguinal Hernia. * **Most common hernia in females:** Indirect Inguinal Hernia (though femoral hernia is *more common in females than in males*, indirect is still the most frequent type in women). * **Anatomical Landmark:** Indirect hernias are **lateral** to the inferior epigastric artery; Direct hernias are **medial**. * **Internal Ring Test:** If the hernia is controlled by occluding the deep internal ring, it is an Indirect Inguinal Hernia.

Question 533: Which of the following is NOT true about mesenteric cysts?

A. Chylolymphatic is the most common type.
B. Enterogenous is the second most common type.
C. They are seen most commonly in males. (Correct Answer)
D. The treatment of choice for enterogenous cysts is resection with anastomosis.

Explanation: **Explanation:** Mesenteric cysts are rare intra-abdominal tumors that arise from the mesentery of the gastrointestinal tract. **Why Option C is the correct answer (The False Statement):** Contrary to the option, mesenteric cysts are **more common in females** than in males (ratio approximately 2:1). They can occur at any age but are most frequently diagnosed in the second decade of life. **Analysis of Other Options:** * **Option A:** **Chylolymphatic cysts** are indeed the most common histological type. They arise from sequestered lymphatic tissue and contain clear or milky fluid (chyle). They typically have a thin wall and an independent blood supply, allowing for simple enucleation. * **Option B:** **Enterogenous cysts** are the second most common type. These are thick-walled cysts derived from the embryonic gut (duplication cysts) and are lined by intestinal epithelium. * **Option D:** Unlike chylolymphatic cysts, enterogenous cysts often **share a common blood supply** with the adjacent bowel. Therefore, simple enucleation is usually impossible without compromising the bowel's vascularity. The treatment of choice is **resection of the cyst along with the involved segment of the bowel**, followed by primary anastomosis. **High-Yield Clinical Pearls for NEET-PG:** * **Tillaux’s Sign:** A classic clinical feature where the cyst is mobile in a direction perpendicular to the line of the mesentery (transverse mobility) but fixed in the longitudinal direction. * **Most common site:** The mesentery of the **ileum** (60%), followed by the ascending colon. * **Clinical Presentation:** Most are asymptomatic but can present with a painless abdominal mass, chronic abdominal pain, or acute complications like torsion, rupture, or intestinal obstruction. * **Diagnosis:** Ultrasound is the initial investigation; CT/MRI provides definitive anatomical localization.

Question 534: A male patient presented with progressive swelling of the upper limb. Examination reveals proximal limb swelling that is non-pitting, with thickened overlying skin. What is the next best step in the management of this patient?

A. PCR
B. X-Ray
C. Night blood test for worms (Correct Answer)
D. Lymphoscintigraphy

Explanation: ### Explanation **1. Why "Night blood test for worms" is correct:** The clinical presentation of progressive, non-pitting edema with skin thickening (hyperkeratosis/elephantiasis) in the upper limb is characteristic of **Lymphatic Filariasis**, most commonly caused by *Wuchereria bancrofti*. In endemic regions like India, this is the most frequent cause of secondary lymphedema. The definitive diagnosis relies on demonstrating microfilariae in the peripheral blood. Since these parasites exhibit **nocturnal periodicity** (circulating in the blood between 10 PM and 2 AM), a night blood smear is the gold standard initial diagnostic step to confirm active infection. **2. Why other options are incorrect:** * **PCR:** While highly sensitive, it is expensive and not the standard "next best step" in a clinical setting compared to the cost-effective and traditional smear. * **X-Ray:** This has limited utility in lymphedema. It may show soft tissue thickening or "calcified worms" in chronic cases, but it does not aid in active diagnosis. * **Lymphoscintigraphy:** This is the **gold standard investigation for assessing lymphatic flow** and structural anatomy. However, it is usually reserved for cases where the diagnosis is unclear or when surgical intervention (like lymphovenous anastomosis) is planned. It does not identify the underlying parasitic cause. **3. Clinical Pearls for NEET-PG:** * **Most common cause of Lymphedema (Global):** Filariasis. * **Most common cause of Lymphedema (Developed countries):** Post-mastectomy/axillary lymph node dissection. * **Stemmer’s Sign:** Inability to pinch the skin on the dorsal surface of the base of the second toe/finger; a pathognomonic sign of lymphedema. * **Milroy’s Disease:** Congenital lymphedema (present at birth) due to VEGFR-3 mutation. * **Drug of Choice:** Diethylcarbamazine (DEC) 6mg/kg for 12 days.

Question 535: All of the following patients presenting with abdominal pain and shock need immediate laparotomy except?

A. Ruptured ectopic pregnancy
B. Hemorrhagic pancreatitis (Correct Answer)
C. Ruptured abdominal aortic aneurysm
D. Ruptured liver hemangioma

Explanation: **Explanation:** The management of acute abdominal pain with shock depends on whether the cause is **exsanguinating hemorrhage** or a **metabolic/inflammatory process**. **Why Hemorrhagic Pancreatitis is the Correct Answer:** Hemorrhagic pancreatitis is primarily a medical emergency, not a surgical one. The shock in pancreatitis is usually **distributive or hypovolemic** (due to massive third-space fluid loss and systemic inflammatory response syndrome), rather than active external or internal exsanguination that can be stopped by a suture. Immediate laparotomy in the early phase of acute pancreatitis is contraindicated as it increases morbidity and mortality. Management focuses on aggressive fluid resuscitation, organ support, and ICU care. Surgery is reserved for late complications like infected necrosis. **Analysis of Incorrect Options:** * **Ruptured Ectopic Pregnancy:** This is a life-threatening cause of **hemoperitoneum**. Immediate surgical intervention (salpingectomy/salpingostomy) is mandatory to achieve hemostasis. * **Ruptured Abdominal Aortic Aneurysm (AAA):** This presents with the classic triad of pain, hypotension, and a pulsatile mass. It requires immediate vascular repair (open or endovascular) to prevent fatal exsanguination. * **Ruptured Liver Hemangioma:** Though rare, a rupture leads to massive intraperitoneal hemorrhage and shock, necessitating urgent laparotomy for packing, hepatic artery ligation, or resection. **NEET-PG Clinical Pearls:** * **Rule of Thumb:** "Never let the sun set on a case of hemoperitoneum with instability." * **Pancreatitis Exception:** In acute pancreatitis, the only early indication for surgery is to rule out other causes (like perforated viscus) if the diagnosis is uncertain. * **High-Yield:** For a stable patient with suspected hemoperitoneum, **CECT** is the investigation of choice; for an unstable patient, **FAST** (Focused Assessment with Sonography for Trauma) is preferred.

Question 536: Which of the following statements regarding keloid is false?

A. Recurrence is common after excision.
B. Keloids can affect surrounding areas.
C. Intralesional steroid injections can decrease the chance of recurrence.
D. Malignant changes can occur in keloids. (Correct Answer)

Explanation: ### Explanation **1. Why Option D is the Correct (False) Statement:** The hallmark of a keloid is that it is a **benign** overgrowth of dense fibrous tissue. Unlike chronic scars (like Marjolin’s ulcer occurring in long-standing burn scars), **keloids do not undergo malignant transformation.** This is a high-yield distinction in surgical pathology. **2. Analysis of Other Options:** * **Option A (Recurrence is common):** This is true. Keloids have a notoriously high recurrence rate (up to 50–100%) if treated with simple surgical excision alone. This is because the trauma of surgery triggers further abnormal collagen synthesis. * **Option B (Affects surrounding areas):** This is a defining clinical feature. Unlike hypertrophic scars, which remain confined to the boundaries of the original wound, **keloids extend beyond the margin of the initial injury**, invading adjacent normal skin. * **Option C (Intralesional steroids):** This is true. Triamcinolone acetonide is the first-line treatment. It inhibits collagen synthesis and reduces fibroblast proliferation, significantly lowering recurrence rates when used alone or as an adjuvant to surgery. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pathology:** Characterized by thick, eosinophilic, "glassy" **Type I and Type III collagen bundles**. * **Common Sites:** Presternal area (most common), deltoid, and earlobes. * **Hypertrophic Scar vs. Keloid:** Hypertrophic scars often regress spontaneously and stay within wound margins; keloids rarely regress and outgrow the wound margins. * **Treatment Triad:** Intralesional steroids, pressure therapy (silicone gel sheets), and occasionally radiotherapy or cryotherapy for resistant cases.

Question 537: Which of the following is NOT a cause of non-surgical infection in a surgical patient?

A. Lower respiratory tract infection
B. Wound infection (Correct Answer)
C. Clostridium difficile diarrhea
D. Urinary tract infection

Explanation: In surgical practice, postoperative infections are broadly categorized into two types: **Surgical Site Infections (SSIs)** and **Non-Surgical Infections**. ### 1. Why "Wound Infection" is the Correct Answer A **Wound Infection** (or Surgical Site Infection) is defined as an infection that occurs at the site of the operative procedure within 30 days (or up to 1 year if an implant is used). Because it is directly related to the surgical incision or the manipulated organ/space, it is classified as a **Surgical Infection**. Therefore, it is the only option that does not fit the "non-surgical" category. ### 2. Analysis of Incorrect Options (Non-Surgical Infections) Non-surgical infections are "remote" infections that occur in a surgical patient but are not directly related to the anatomical site of the operation. * **Lower Respiratory Tract Infection (Option A):** Often manifests as postoperative pneumonia or atelectasis-related infection. It is a systemic complication, not a site-specific surgical infection. * **Clostridium difficile Diarrhea (Option C):** This is a healthcare-associated infection resulting from antibiotic-induced alteration of gut flora. While common in surgical wards, it is a gastrointestinal complication, not a surgical site issue. * **Urinary Tract Infection (Option D):** Usually associated with indwelling catheters (CAUTI). It is the most common non-surgical nosocomial infection in postoperative patients. ### 3. NEET-PG High-Yield Pearls * **Most common non-surgical infection:** Urinary Tract Infection (UTI). * **Most common cause of post-op fever (Day 1-2):** Atelectasis (though technically an inflammatory state, it often leads to pneumonia). * **SSI Timing:** Most SSIs appear between postoperative days 5 and 10. * **Classification of SSIs:** They are divided into **Superficial Incisional** (skin/subcutaneous), **Deep Incisional** (fascia/muscle), and **Organ/Space** (e.g., intra-abdominal abscess).

Question 538: Which statement is not true regarding thoracic outlet syndrome?

A. The radial nerve is commonly affected. (Correct Answer)
B. Neurological features are the most common presentation.
C. Resection of the first rib can relieve symptoms.
D. A positive Adson's test is indicative of the condition.

Explanation: ### Explanation **Thoracic Outlet Syndrome (TOS)** involves the compression of neurovascular structures (brachial plexus, subclavian artery, or subclavian vein) as they pass through the superior thoracic aperture. **1. Why Option A is the Correct Answer (The False Statement):** The **lower trunk of the brachial plexus (C8-T1)** is the most commonly compressed neural structure in TOS. These fibers eventually form the **ulnar nerve**. Therefore, symptoms typically manifest along the ulnar distribution (medial forearm and hand). The **radial nerve**, derived from the posterior cord (C5-T1), is rarely involved in isolation or as a primary feature of TOS. **2. Analysis of Other Options:** * **Option B:** Approximately **90-95% of TOS cases are neurogenic**, presenting with pain, paresthesia, and wasting of intrinsic hand muscles (Gilliatt-Sumner hand). Only 5% are venous and 1% are arterial. * **Option C:** Surgical management involves decompressing the space. **Resection of the first rib** (transaxillary or supraclavicular approach) or a cervical rib is the definitive treatment for refractory cases to create more space for the neurovascular bundle. * **Option D:** **Adson’s Test** is a classic clinical maneuver where the patient extends the neck and turns the head toward the affected side while taking a deep breath. A positive test is indicated by a **marked decrease or disappearance of the radial pulse**, suggesting compression of the subclavian artery. ### High-Yield Clinical Pearls for NEET-PG: * **Most common cause:** Presence of a **Cervical Rib** (congenital) or anomalous bands. * **Gilliatt-Sumner Hand:** Characterized by wasting of the thenar and hypothenar eminence due to chronic T1 nerve root compression. * **Paget-Schroetter Syndrome:** Also known as "effort thrombosis," it is the spontaneous thrombosis of the subclavian vein, a form of Venous TOS. * **Roos Test (Elevated Arm Stress Test):** The most reliable clinical screening test for TOS (patient opens/closes hands for 3 minutes with arms abducted).

Question 539: All of the following are absolute contraindications for tooth extraction except?

A. Central hemangioma
B. Fistulas
C. Unstable angina pectoris (Correct Answer)
D. Arteriovenous malformation

Explanation: In dental surgery, contraindications for tooth extraction are categorized into **absolute** (where the procedure poses an immediate life-threatening risk) and **relative** (where the procedure can be performed after medical stabilization). ### Why "Unstable Angina Pectoris" is the Correct Answer While unstable angina is a severe medical condition, it is technically a **relative contraindication**. In such cases, elective extractions are postponed until the cardiac status is stabilized (usually 6 months post-infarct or until cleared by a cardiologist). If an extraction is an emergency, it can be performed in a hospital setting with cardiac monitoring and sedation. In contrast, the other options represent anatomical vascular anomalies where extraction would lead to uncontrollable, fatal hemorrhage. ### Analysis of Incorrect Options * **Central Hemangioma (A):** This is an **absolute contraindication**. It is a proliferation of blood vessels within the bone. Extracting a tooth associated with a central hemangioma can lead to "exsanguinating hemorrhage" that is nearly impossible to control chairside. * **Arteriovenous Malformation (D):** Similar to hemangiomas, AVMs involve direct high-pressure communication between arteries and veins. Extraction in this area causes massive, high-velocity bleeding, making it an **absolute contraindication**. * **Fistulas (B):** While the question phrasing is slightly controversial in older texts, in the context of vascular lesions (like an Arteriovenous Fistula), it is considered an **absolute contraindication** due to the risk of uncontrollable bleeding. ### NEET-PG High-Yield Pearls * **Absolute Contraindications:** Central hemangioma, AVM, and uncontrolled systemic diseases (e.g., end-stage leukemia or hemophilia without factor replacement). * **Cardiac Rule:** Post-Myocardial Infarction (MI), elective extractions should be avoided for **6 months**. * **Radiographic Sign:** A "sunburst" appearance or multilocular "soap bubble" appearance on a jaw X-ray should alert a surgeon to a vascular lesion; **never** extract without prior aspiration or angiography.

Question 540: All of the following are true about suturing principles except:

A. Each suture should be separated by a gap that is twice the thickness of the skin
B. Suture length to wound length ratio of 4:1
C. Length to width ratio for elliptical incisions of 3:1
D. None of the above (Correct Answer)

Explanation: This question tests fundamental surgical principles regarding wound closure and incision planning, which are high-yield topics for NEET-PG. The correct answer is **"None of the above"** because all three statements (A, B, and C) are established surgical axioms. ### **Explanation of Options:** * **Option A (Gap between sutures):** The standard rule for interrupted sutures is that the distance between two sutures should be **twice the thickness of the skin** (or equal to the distance from the wound edge to the needle entry point). This ensures adequate apposition without compromising blood supply to the wound edges. * **Option B (Suture length to wound length ratio):** For continuous abdominal wall closure (Laparotomy), the **Jenkins Rule** states that the suture length should be at least **4 times the length of the wound (4:1 ratio)**. This allows for post-operative edema and prevents the "cheese-cutter" effect, significantly reducing the risk of incisional hernia and wound dehiscence. * **Option C (Elliptical incision ratio):** When performing an elliptical excision (e.g., for a skin lesion), the ideal **length-to-width ratio is 3:1**. This ratio ensures that the wound can be closed primarily without creating "dog-ears" (redundant skin folds) at the corners. ### **High-Yield Clinical Pearls for NEET-PG:** * **Langer’s Lines:** Incisions should ideally be made parallel to these tension lines to ensure minimal scarring. * **Suture Removal:** Face (3–5 days), Scalp (7–10 days), Trunk/Extremities (10–14 days). * **Monofilament vs. Braided:** Monofilament (e.g., Prolene) has a lower risk of infection but poor knot security; Braided (e.g., Silk, Vicryl) has better handling but higher risk of "wicking" bacteria. * **Ideal Suture for Fascia:** Delayed absorbable (e.g., PDS) or non-absorbable monofilament (e.g., Prolene).

Practice by Chapter

Wound Healing and Care

Practice Questions

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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