General Surgery Principles Practice Questions

Q: Non-bilious vomiting is typically seen in which of the following conditions?

Hypertrophic pyloric stenosis. **Explanation:** The key to distinguishing between types of pediatric intestinal obstruction lies in the anatomical relationship to the **Ampulla of Vater** (where the common bile duct enters the second part of the duodenum). **1. Why Hypertrophic Pyloric Stenosis (HPS) is correct:** In HPS, there is hypertrophy of the pyloric sphincter muscle, causing a functional gastric outlet obstruction. Because the obstruction is **proximal** to the Ampulla of Vater, the gastric contents (milk/formula) cannot mix with bile. Therefore, the hallmark clinical presentation is **non-bilious, projectile vomiting** in an infant typically aged 3–6 weeks. **2. Why the other options are incorrect:** * **Duodenal Atresia:** The obstruction most commonly occurs distal to the Ampulla of Vater. Thus, it typically presents with **bilious vomiting** within the first 24–48 hours of life. It is classically associated with the "double bubble" sign on X-ray. * **Meconium Ileus:** This is a distal small bowel obstruction (terminal ileum) often associated with Cystic Fibrosis. Since the blockage is far distal to the bile duct, the vomitus is **bilious**. * **Necrotising Enterocolitis (NEC):** This is an inflammatory/ischemic necrosis of the bowel. It presents with abdominal distension, bloody stools, and **bilious** gastric residuals or vomiting. **Clinical Pearls for NEET-PG:** * **Metabolic Profile in HPS:** Hypochloremic, hypokalemic, metabolic alkalosis with paradoxical aciduria. * **Physical Exam:** A palpable "olive-shaped" mass in the epigastrium. * **Ultrasound (Investigation of Choice):** Look for pyloric muscle thickness >4mm and pyloric canal length >14mm. * **Treatment:** Ramstedt’s Pyloromyotomy (after correcting electrolyte imbalances).

Q: Which of the following is a laparoscopic technique in inguinal hernia mesh repair?

TEP. **Explanation:** In modern hernia surgery, techniques are broadly classified into **Open** and **Laparoscopic** repairs. The correct answer is **TEP (Totally Extraperitoneal)**, which is one of the two primary laparoscopic approaches for inguinal hernia repair. **1. Why TEP is correct:** TEP is a laparoscopic technique where the surgeon accesses the preperitoneal space without entering the peritoneal (abdominal) cavity. A mesh is placed to cover the entire myopectineal orifice of Fruchaud. Its main advantage is a lower risk of visceral injury compared to the TAPP (Transabdominal Preperitoneal) approach. **2. Why other options are incorrect:** * **Lichtenstein (Option A):** This is the "Gold Standard" for **open** tension-free mesh repair. It involves placing a polypropylene mesh over the inguinal floor via an anterior incision. * **Stoppa (Option B):** Also known as Giant Prosthetic Reinforcement of the Visceral Sac (GPRVS), this is an **open** posterior approach used primarily for complex or bilateral recurrent hernias. * **Desarda (Option C):** This is an **open** tissue-based (non-mesh) repair that uses a strip of the external oblique aponeurosis to strengthen the inguinal floor. **Clinical Pearls for NEET-PG:** * **TAPP vs. TEP:** TAPP involves entering the peritoneal cavity; TEP does not. * **Triangle of Doom:** Bound by the vas deferens and spermatic vessels; contains the **external iliac artery and vein**. Avoid tacking here. * **Triangle of Pain:** Bound by the spermatic vessels and iliopubic tract; contains the **femoral nerve, genitofemoral nerve (genital branch), and lateral cutaneous nerve of the thigh**. * **Nerve most commonly injured in Laparoscopic repair:** Lateral cutaneous nerve of the thigh (leading to meralgia paresthetica). * **Nerve most commonly injured in Open repair:** Ilioinguinal nerve.

Q: A 40-year-old female presents with fever, fatigue, and diffuse painful swelling in the midline of the neck. FNAC revealed epithelioid cells and giant cells. What is the most likely diagnosis?

Subacute thyroiditis. The clinical presentation of a **painful, diffuse midline neck swelling** (thyroid) associated with systemic symptoms like **fever and fatigue** is classic for **Subacute Thyroiditis (De Quervain’s Thyroiditis)**. [2] **Why Subacute Thyroiditis is correct:** This condition is typically post-viral. The hallmark histopathological finding on Fine Needle Aspiration Cytology (FNAC) is the presence of **multinucleated giant cells** and **epithelioid cells** forming "pseudo-tubercles" surrounding collapsed follicles. [2] Clinically, patients often present with a tender thyroid and an elevated ESR. **Why the other options are incorrect:** * **Acute Thyroiditis:** This is a bacterial infection (usually *S. aureus*). While it presents with fever and pain, FNAC would show **neutrophils and abscess formation**, not giant cells or epithelioid cells. * **Tubercular Lymphadenitis:** While this shows epithelioid cells and giant cells (caseating granulomas), the swelling is typically located in the **lateral neck (cervical lymph nodes)**, not as a diffuse midline thyroid swelling. * **Hashimoto’s Thyroiditis:** This is usually a **painless** goiter. [3] FNAC characteristically shows a dense **lymphocytic infiltrate** and **Hurthle cells** (Askanazy cells), not the giant cells seen in the subacute variety. [3][4] **NEET-PG High-Yield Pearls:** * **De Quervain’s** is the most common cause of a **painful** thyroid. [2] * **Lab findings:** High ESR, low TSH (initially), and characteristically **low radioactive iodine uptake (RAIU)** due to follicular destruction. [1] * **Treatment:** Primarily symptomatic with NSAIDs; steroids are used for severe pain. [2] It is usually self-limiting. [1]

Q: What is the current permissible maximum storage time and temperature for platelets?

5 days at 20-24°C. **Explanation** The correct answer is **B. 5 days at 20-24°C**. **1. Understanding the Concept** Platelets are unique compared to other blood components because they must be stored at **room temperature (20-24°C)** with **continuous agitation**. Agitation prevents platelet aggregation and maintains oxygen exchange, which is vital for preserving the "platelet storage lesion" (metabolic viability). If platelets are refrigerated (1-6°C), they undergo irreversible structural changes and are rapidly cleared by the liver upon transfusion, rendering them ineffective. The storage limit is capped at **5 days** primarily due to the high risk of bacterial proliferation at room temperature. **2. Analysis of Incorrect Options** * **Option A (1-6°C):** This is the storage temperature for Whole Blood and Packed Red Blood Cells (PRBCs). Cold temperatures cause platelet activation and dysfunction. * **Option C (7 days):** While some specialized bags or pathogen-reduction technologies (PRT) allow for 7-day storage in certain countries, the standard global and Indian (DGHS/NBTC) guideline remains 5 days to minimize sepsis risk. * **Option D (25-27°C):** This temperature is too high and exceeds the physiological range, accelerating bacterial growth and platelet degradation. **3. High-Yield Clinical Pearls for NEET-PG** * **Agitation:** Must be continuous (using a platelet agitator). * **Dose:** 1 unit of Random Donor Platelets (RDP) increases the count by **5,000–10,000/µL**; 1 unit of Single Donor Platelets (SDP) increases it by **30,000–60,000/µL**. * **Transfusion Trigger:** Usually <10,000/µL in stable patients or <50,000/µL if undergoing surgery. * **Complication:** Platelets have the **highest risk of bacterial contamination** among all blood products.

Q: Lord's plication is done for which condition?

Hydrocele. **Explanation:** **Lord’s Plication** is a surgical procedure specifically used for the treatment of a **primary vaginal hydrocele**. The underlying principle of this surgery is the "plication" (folding and suturing) of the redundant tunica vaginalis. Unlike the Jaboulay’s procedure, which involves eversion of the sac, Lord’s plication involves multiple radiating mattress sutures that bunch up the sac margins. This technique is preferred for small to medium-sized thin-walled hydroceles as it minimizes dissection, thereby reducing the risk of postoperative hematoma and infection. **Analysis of Incorrect Options:** * **A. Inguinal Hernia:** Managed via herniotomy (in children) or lichenstein tension-free mesh repair (in adults). Lord’s procedure does not address the patent processus vaginalis or the abdominal wall defect. * **B. Testicular Cancer:** Requires a **Radical High Inguinal Orchidectomy**. Scrotal approaches (like Lord’s) are strictly contraindicated in suspected malignancy due to the risk of altering lymphatic drainage and causing local recurrence. * **D. Testicular Varices (Varicocele):** Treated via surgical ligation of the pampiniform plexus (e.g., Palomo’s or Ivanissevich procedure) or microsurgical subinguinal varicocelectomy. **Clinical Pearls for NEET-PG:** * **Jaboulay’s Procedure:** The gold standard for large, thick-walled hydroceles (involves eversion of the sac). * **Lord’s Procedure:** Best for thin-walled sacs; has the lowest incidence of postoperative hematoma. * **Hydrocele Fluid:** Typically amber-colored, rich in albumin and cholesterol. * **Transillumination Test:** The classic clinical sign used to differentiate a hydrocele (positive) from a hernia or solid tumor (negative).

Q: Infection of the index finger spreads to which space?

Thenar space. ### Explanation The hand contains potential fascial spaces that dictate the spread of infection. The correct answer is **Thenar space** due to the specific anatomical arrangement of the synovial sheaths and fascial planes. **1. Why Thenar Space is Correct:** The index finger is anatomically linked to the thenar space via its flexor tendon sheath. While the synovial sheath of the index finger usually ends at the level of the proximal palmar crease, infections that escape this sheath or involve the deep fascial planes of the index finger naturally track into the **thenar space** (located lateral to the mid-palmar septum). **2. Analysis of Incorrect Options:** * **Mid-palmar space:** This space receives infections from the **middle, ring, and little fingers**. It is separated from the thenar space by a strong fibrous septum attached to the third metacarpal bone. * **Radial bursa:** This is the proximal continuation of the synovial sheath of the **thumb** (pollicis longus). Infection of the thumb spreads here, not the index finger. * **Dorsum of hand:** This is a subcutaneous or subaponeurotic space. While infection can spread here via lymphatic drainage, the primary anatomical "space" for index finger infections remains the thenar space. **3. Clinical Pearls for NEET-PG:** * **Kanavel’s Signs:** Used to diagnose infectious tenosynovitis (Flexed posture, Fusiform swelling, Tenderness along the sheath, Pain on passive extension). * **Horseshoe Abscess:** Occurs when infection spreads from the **little finger (ulnar bursa)** to the **thumb (radial bursa)** or vice versa, as these bursae communicate in 80% of individuals. * **Space Boundaries:** The mid-palmar and thenar spaces are separated by the **mid-palmar septum** (attached to the 3rd metacarpal). * **Most common site of web space infection:** The second web space (due to its proximity to the index finger).

Q: The triangle of pain is bordered by all of the following EXCEPT?

Ductus deferens. The **Triangle of Pain** is a critical anatomical landmark during laparoscopic inguinal hernia repair (TEP/TAPP). It is an area of potential nerve injury that surgeons must avoid when placing tacks or mesh. ### Why "Ductus Deferens" is the Correct Answer The **ductus deferens** (vas deferens) is a boundary of the **Triangle of Doom**, not the Triangle of Pain. The Triangle of Doom is located medial to the gonadal vessels and contains the external iliac artery and vein. ### Boundaries of the Triangle of Pain The Triangle of Pain is located **lateral** to the gonadal vessels. Its boundaries are: * **Superomedial:** Gonadal vessels (Spermatic vessels). * **Superolateral:** Iliopubic tract. * **Inferior:** Reflected peritoneum (or the fold of the peritoneum). ### Clinical Significance & High-Yield Facts * **Contents:** This triangle contains the **Lateral femoral cutaneous nerve** (most commonly injured), the **Femoral branch of the genitofemoral nerve**, and the **Femoral nerve**. * **Clinical Pearl:** Tacking mesh in this zone can lead to chronic post-operative pain or paresthesia in the thigh. * **Comparison:** * **Triangle of Pain:** Lateral to gonadal vessels; contains nerves. * **Triangle of Doom:** Medial to gonadal vessels; contains major iliac vessels. * **Circle of Death:** A vascular circle formed by the anastomosis between the obturator artery and the inferior epigastric artery (Corona Mortis), which can lead to uncontrollable bleeding if injured.

Question 1

Non-bilious vomiting is typically seen in which of the following conditions?

Accepted Answer

Hypertrophic pyloric stenosis

Answer

Meconium ileus

Answer

Duodenal atresia

Answer

Necrotising enterocolitis

Question 2

Chronic Burrowing ulcer is caused by which microorganism?

Accepted Answer

Microaerophilic streptococci

Answer

Peptostreptococcus

Answer

Streptococcus viridans

Answer

Streptococcus pyogenes

Question 3

Which of the following is a laparoscopic technique in inguinal hernia mesh repair?

Accepted Answer

TEP

Answer

Lichtenstein

Answer

Stoppa

Answer

Desarda

Question 4

A 40-year-old female presents with fever, fatigue, and diffuse painful swelling in the midline of the neck. FNAC revealed epithelioid cells and giant cells. What is the most likely diagnosis?

Accepted Answer

Subacute thyroiditis

Answer

Acute thyroiditis

Answer

Tubercular lymphadenitis

Answer

Hashimoto's thyroiditis

Question 5

What is the current permissible maximum storage time and temperature for platelets?

Accepted Answer

5 days at 20-24°C

Answer

5 days at 1-6°C

Answer

7 days at 22-24°C

Answer

5 days at 25-27°C

Question 6

Splenectomy is not useful as a mode of treatment in which of the following conditions?

Accepted Answer

Porphyria

Answer

Thalassemia

Answer

Hereditary spherocytosis

Answer

Sickle cell disease with large spleen

Question 7

Lord's plication is done for which condition?

Accepted Answer

Hydrocele

Answer

Inguinal hernia

Answer

Testicular cancer

Answer

Testicular varices

Question 8

Infection of the index finger spreads to which space?

Accepted Answer

Thenar space

Answer

Mid-palmar space

Answer

Radial bursa

Answer

Dorsum of hand

Question 9

The triangle of pain is bordered by all of the following EXCEPT?

Accepted Answer

Ductus deferens

Answer

Iliopubic tract

Answer

Gonadal vessels

Answer

Reflected peritoneum

Question 10

What is true about Abdominal compartment syndrome?

Accepted Answer

Decreased Cardiac Output

Answer

Decreased Pulmonary capillary wedge pressure

Answer

Decreased Venous return

Answer

Decreased Systemic vascular resistance

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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