General Surgery Principles Practice Questions

Q: What is the most common serious complication that can occur following surgery in the maxillary incisor region?

Cavernous sinus thrombosis. **Explanation:** The correct answer is **Cavernous Sinus Thrombosis (CST)**. This is a life-threatening complication arising from infections or surgical trauma in the "danger area of the face," which includes the upper lip, nose, and maxillary incisor region. **Why Cavernous Sinus Thrombosis is correct:** The venous drainage of the maxillary incisor region is primarily through the **angular and facial veins**. These veins are unique because they lack valves, allowing for retrograde blood flow. They communicate with the **superior ophthalmic vein**, which drains directly into the cavernous sinus. Surgical trauma or infection in this region can lead to the formation of an infected thrombus that travels backward into the cavernous sinus, leading to CST. This condition presents with chemosis, proptosis, and cranial nerve palsies (III, IV, V1, V2, and VI). **Why other options are incorrect:** * **Iritis:** While inflammatory, it is an intraocular condition and not a direct systemic or vascular complication of dental surgery. * **Cellulitis:** This is a common localized complication (soft tissue infection), but it is generally less "serious" or life-threatening compared to the intracranial spread seen in CST. * **Periapical abscess:** This is usually the *cause* of the need for surgery rather than a complication *following* it. **High-Yield Clinical Pearls for NEET-PG:** * **Danger Area of the Face:** Bound by the commissures of the lips and the bridge of the nose. * **Valveless Veins:** The primary anatomical reason for the spread of infection from the face to the dural venous sinuses. * **First Sign of CST:** Often the involvement of the **Abducens nerve (CN VI)** because it runs centrally through the cavernous sinus, unlike other nerves located in the lateral wall.

Q: A 17-year-old female presents with a non-tender, firm, and mobile breast lump. FNAC reveals tightly arranged ductal epithelial cells with dyscohesive bare nuclei. What is the most likely diagnosis?

Fibroadenoma. **Explanation:** The clinical presentation and cytological findings are classic for a **Fibroadenoma**, the most common benign breast tumor in young females (typically <30 years). **Why Fibroadenoma is correct:** 1. **Clinical Presentation:** A firm, non-tender, and highly mobile lump in a 17-year-old is the classic "Breast Mouse" (so-called because it slips away under the fingers). 2. **FNAC Findings:** The presence of **tightly arranged ductal epithelial cells** (often in staghorn or antler-like patterns) along with **dyscohesive bare bipolar nuclei** in the background is pathognomonic. These bare nuclei represent the myoepithelial cells of the stroma. **Why other options are incorrect:** * **DCIS & LCIS:** These are typically seen in older women (post-menopausal). On FNAC, DCIS would show malignant features like pleomorphism and necrosis, while LCIS often lacks the characteristic stromal component and bare nuclei seen here. * **Phyllodes Tumor:** While it shares features with fibroadenoma (biphasic), it usually presents in older age groups (40-50s), grows rapidly, and shows increased stromal cellularity with leaf-like projections and frequent mitoses on histology. **High-Yield Clinical Pearls for NEET-PG:** * **Most common benign tumor of the breast:** Fibroadenoma. * **"Breast Mouse":** Due to high mobility within the breast tissue. * **Giant Fibroadenoma:** Defined as a fibroadenoma >5 cm in size or >500g in weight. * **Management:** Conservative if 35y), and Pathology (FNAC/Core Biopsy).

Q: Which of the following is a delayed absorbable synthetic suture material?

Vicryl. **Explanation:** The classification of suture materials is a high-yield topic for NEET-PG, based on two criteria: origin (natural vs. synthetic) and longevity (absorbable vs. non-absorbable). **Why Vicryl is Correct:** **Vicryl (Polyglactin 910)** is a **synthetic, braided, absorbable** suture. It is classified as "delayed absorbable" because it retains approximately 50% of its tensile strength at 3 weeks and is completely absorbed via **hydrolysis** within 60–90 days. This makes it ideal for sub-cutaneous tissue and soft tissue approximation. **Analysis of Incorrect Options:** * **Chromic Catgut:** This is a **natural absorbable** suture derived from the submucosa of sheep intestine or serosa of bovine intestine. It is treated with chromic acid salts to delay absorption, but it is not synthetic and is absorbed via enzymatic digestion (causing more tissue reaction). * **Silk:** This is a **natural non-absorbable** suture. While it may technically degrade over several years, it is clinically classified as non-absorbable. It is braided and known for excellent handling but high tissue reactivity. * **Nylon (Ethilon):** This is a **synthetic non-absorbable** monofilament. It is commonly used for skin closure due to its high tensile strength and low infection risk. **High-Yield Clinical Pearls for NEET-PG:** * **Fastest absorption:** Plain catgut (7–10 days). * **Longest-acting synthetic absorbable:** PDS (Polydioxanone) – maintains strength for up to 6 weeks; ideal for abdominal wall closure. * **Absorption mechanism:** Synthetic sutures (Vicryl, PDS, Monocryl) undergo **hydrolysis** (less reaction), while natural sutures (Catgut) undergo **enzymatic degradation** (more reaction). * **Suture of choice for vascular anastomosis:** Prolene (Polypropylene) – synthetic, non-absorbable monofilament with the least thrombogenicity.

Q: All of the following are premalignant lesions except?

Salmon patch. **Explanation:** The correct answer is **Salmon patch** because it is a benign vascular malformation, not a premalignant lesion. **1. Why Salmon Patch is the Correct Answer:** A Salmon patch (also known as *nevus simplex* or "stork bite/angel kiss") is a common capillary malformation seen in newborns. It is characterized by pink or red patches, typically on the nape of the neck, eyelids, or forehead. These are entirely benign, do not undergo malignant transformation, and usually fade spontaneously within the first few years of life. **2. Analysis of Incorrect Options (Premalignant Lesions):** * **Extramammary Paget's Disease (EMPD):** This is a rare intraepidermal adenocarcinoma. It is considered a premalignant condition because it is frequently associated with an underlying internal malignancy (e.g., adnexal, colorectal, or bladder cancer) or can progress to invasive squamous cell carcinoma. * **Giant Congenital Pigmented Naevus:** These are large melanocytic nevi present at birth. They carry a significant lifetime risk (approximately 5–10%) of developing into **Malignant Melanoma**, necessitating close monitoring or prophylactic excision. * **Dysplastic Naevus:** Also known as atypical moles, these are histologically distinct melanocytic nevi. They are well-established precursors and clinical markers for an increased risk of cutaneous melanoma. **Clinical Pearls for NEET-PG:** * **Salmon Patch vs. Port-wine Stain:** Unlike Salmon patches, Port-wine stains (*Nevus Flammeus*) do not fade with age and may be associated with **Sturge-Weber Syndrome**. * **Rule of 20:** Giant congenital nevi are often defined as those predicted to reach >20 cm in diameter by adulthood. * **Other common premalignant skin lesions:** Actinic keratosis (precursor to SCC), Bowen’s disease (SCC in situ), and Xeroderma pigmentosum.

Q: Which hernia occurs below and lateral to the pubic tubercle?

Femoral Hernia. **Explanation:** The anatomical relationship to the **pubic tubercle** is the most critical landmark for differentiating groin hernias. **1. Why Femoral Hernia is Correct:** A femoral hernia passes through the femoral canal, which is located inferior to the inguinal ligament. Anatomically, the femoral canal lies **below and lateral** to the pubic tubercle. This is a high-yield distinction because femoral hernias are more common in females due to a wider pelvis and are highly prone to incarceration and strangulation due to the rigid boundaries of the femoral ring. **2. Why the Other Options are Incorrect:** * **Inguinal Hernia:** These occur **above and medial** to the pubic tubercle. They pass through the inguinal canal (indirect) or Hesselbach’s triangle (direct), both of which are superior to the inguinal ligament. * **Morgagnian Hernia:** This is a type of congenital diaphragmatic hernia occurring through the Foramen of Morgagni (retrosternal/parasternal). It presents in the chest/upper abdomen, not the groin. * **Sliding Hernia:** This refers to a hernia where a portion of a visceral organ (like the cecum or bladder) forms part of the hernia sac wall. While it can be inguinal, the term describes the *content* rather than a specific anatomical location relative to the tubercle. **NEET-PG Clinical Pearls:** * **The Rule of Thumb:** Above and Medial = Inguinal; Below and Lateral = Femoral. * **Most Common Hernia:** Indirect Inguinal hernia is the most common type in both males and females. * **Highest Risk of Strangulation:** Femoral hernia (due to the sharp edge of the lacunar ligament). * **McVay Repair:** The surgical procedure of choice for femoral hernias, involving the suturing of the conjoined tendon to Cooper’s ligament.

Q: Fever in a burnt patient is caused by what?

Septicemia. **Explanation:** In the context of burn injuries, **Septicemia (Option A)** is the most significant and clinically relevant cause of fever. While several factors can elevate body temperature in burn patients, a true fever (especially one occurring after the initial 48 hours) is considered a hallmark of invasive infection. The loss of the skin barrier, combined with the presence of necrotic tissue (eschar) and impaired immune response, makes burn patients highly susceptible to bacterial translocation and systemic infection, primarily by *Pseudomonas aeruginosa* or *Staphylococcus aureus*. **Analysis of Incorrect Options:** * **Hypermetabolism (Option B):** Burn patients do experience a massive hypermetabolic state due to a "cytokine storm" and catecholamine release, which increases the basal metabolic rate and core temperature. However, in the context of a clinical exam, fever is traditionally attributed to infection unless proven otherwise. * **Decreased sweating (Option C):** While damaged sweat glands in deep burns can impair thermoregulation (leading to hyperthermia in hot environments), it is not the primary mechanism for the systemic fever seen in the clinical course of a burn victim. * **Release of pyrogens (Option D):** While necrotic tissue can release endogenous pyrogens, this usually contributes to a low-grade temperature spike in the early phase. Persistent or high-grade fever is more definitively linked to the systemic inflammatory response triggered by sepsis. **Clinical Pearls for NEET-PG:** * **Most common cause of death** in burns after the first 48 hours is **Sepsis**. * **Burn Wound Sepsis** is defined as >10⁵ organisms per gram of tissue. * **First sign of burn wound sepsis:** Often a change in the color of the eschar, graft loss, or ileus, rather than just fever. * **Topical Antibiotic of Choice:** Silver Sulfadiazine (standard), Mafenide Acetate (penetrates eschar, used in ear burns).

Q: Spigelian hernia is typically seen in which anatomical region?

Subumbilical region. **Explanation:** A **Spigelian hernia** (also known as a spontaneous lateral ventral hernia) occurs through a defect in the **Spigelian fascia**. This fascia is the aponeurotic layer located between the lateral border of the rectus abdominis muscle and the semilunar line (the junction of the muscular fibers of the transversus abdominis with its aponeurosis). **Why Option B is correct:** The Spigelian fascia is widest and weakest in the **subumbilical region**, specifically where the posterior rectus sheath terminates at the **arcuate line (of Douglas)**. Below this line, all aponeurotic layers pass anterior to the rectus muscle, leaving the area structurally vulnerable. Most Spigelian hernias occur within the "Spigelian hernia belt," a 6 cm wide transverse zone located just above the interspinal plane. **Why other options are incorrect:** * **A. Lumbar triangle:** This is the site for lumbar hernias (Petit’s triangle or Grynfeltt-Lesshaft triangle), located in the posterior abdominal wall. * **C & D. Paraumbilical/Supraumbilical regions:** While the Spigelian fascia extends superiorly, the aponeurotic fibers are much stronger and the fascia is narrower above the umbilicus, making hernias in these regions extremely rare. **Clinical Pearls for NEET-PG:** * **"Interstitial Hernia":** It is often called an interstitial hernia because the sac typically lies deep to the external oblique aponeurosis, making it difficult to diagnose on physical exam (no obvious bulge). * **High Risk of Strangulation:** Due to the narrow, rigid neck of the defect, the risk of incarceration and strangulation is high; thus, surgical repair is always indicated. * **Diagnosis:** Ultrasound or CT scan is the gold standard for diagnosis when clinical suspicion is high but no mass is palpable.

Q: Burst abdomen following laparotomy typically occurs after how many days?

6-9 days. **Explanation:** **Burst Abdomen (Abdominal Wound Dehiscence)** is a serious postoperative complication where the layers of the abdominal wall separate, often leading to evisceration. **Why 6-9 days is correct:** The integrity of a surgical wound depends on the balance between the degradation of old collagen and the synthesis of new collagen. The **lag phase** of wound healing occurs during the first 5 days, where tensile strength is at its lowest and the wound relies entirely on sutures. Between **days 6 and 9**, the sutures may begin to cut through the tissues (especially if there is excessive tension or infection), while the new collagen hasn't yet gained sufficient strength to hold the edges together. This "weak window" is when most dehiscences occur. **Analysis of Incorrect Options:** * **1-2 days (Option A):** Too early. At this stage, the sutures are fresh and the tissue has not yet undergone the enzymatic softening (collagenolysis) that leads to "cutting out." * **2 weeks (Option C):** By day 14, the proliferative phase is well underway, and the wound has regained enough tensile strength to resist most dehiscing forces. * **4 weeks (Option D):** This is the remodeling phase. Failure at this stage is rare and would typically present as an incisional hernia rather than an acute "burst." **NEET-PG High-Yield Pearls:** * **The "Pink Serous Discharge" Sign:** A serosanguinous (pinkish) discharge from the wound on the 5th or 6th day is the most important clinical herald of an impending burst abdomen. * **Most Common Cause:** Technical error (e.g., sutures tied too tightly or too close to the edge). * **Risk Factors:** Increased intra-abdominal pressure (coughing, distension), malnutrition (hypoalbuminemia), and emergency surgeries. * **Management:** Immediate coverage with sterile saline-soaked gauze followed by urgent surgical re-closure (usually using "tension sutures").

Question 1

What is the most common serious complication that can occur following surgery in the maxillary incisor region?

Accepted Answer

Cavernous sinus thrombosis

Answer

Iritis

Answer

Cellulitis

Answer

Periapical abscess

Question 2

Excision of the hyoid bone is indicated in which of the following conditions?

Accepted Answer

Thyroglossal cyst

Answer

Sublingual dermoids

Answer

Ludwig's angina

Answer

Branchial cyst

Question 3

A 17-year-old female presents with a non-tender, firm, and mobile breast lump. FNAC reveals tightly arranged ductal epithelial cells with dyscohesive bare nuclei. What is the most likely diagnosis?

Accepted Answer

Fibroadenoma

Answer

Ductal Carcinoma In Situ (DCIS)

Answer

Phyllodes tumor

Answer

Lobular Carcinoma In Situ (LCIS)

Question 4

Which of the following is a delayed absorbable synthetic suture material?

Accepted Answer

Vicryl

Answer

Chromic catgut

Answer

Silk

Answer

Nylon

Question 5

All of the following are premalignant lesions except?

Accepted Answer

Salmon patch

Answer

Extramammary Paget's disease

Answer

Giant congenital pigmented naevus

Answer

Dysplastic naevus

Question 6

Which hernia occurs below and lateral to the pubic tubercle?

Accepted Answer

Femoral Hernia

Answer

Inguinal hernia

Answer

Morgagnian Hernia

Answer

Sliding Hernia

Question 7

Fever in a burnt patient is caused by what?

Accepted Answer

Septicemia

Answer

Hypermetabolism

Answer

Decreased sweating

Answer

Release of pyrogens from necrotic tissue

Question 8

Spigelian hernia is typically seen in which anatomical region?

Accepted Answer

Subumbilical region

Answer

Lumbar triangle

Answer

Paraumbilical region

Answer

Supraumbilical region

Question 9

What does the Ross procedure involve?

Accepted Answer

Replacement of the aortic valve with an autologous pulmonic valve and implantation of a pulmonic valve homograft.

Answer

Replacement of the aortic valve with a pulmonic homograft.

Answer

Replacement of the mitral valve with a tissue prosthesis and repair of the tricuspid valve.

Answer

Replacement of the aortic valve with a porcine valve and repair of the pulmonary valve.

Question 10

Burst abdomen following laparotomy typically occurs after how many days?

Accepted Answer

6-9 days

Answer

1-2 days

Answer

2 weeks

Answer

4 weeks

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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