General Surgery Principles Practice Questions

Q: All of the following are true regarding sebaceous cysts EXCEPT:

It only occurs on the face and scalp.. **Explanation:** The correct answer is **B** because sebaceous cysts can occur on any hair-bearing area of the body where sebaceous glands are present. While the face, scalp, and neck are the most common sites, they are frequently found on the trunk, scrotum, and labia. They are notably absent only on the palms and soles, which lack hair follicles. **Analysis of Options:** * **Option A:** Sebaceous cysts are a type of **epidermoid cyst**. They result from the obstruction of a sebaceous duct, leading to the accumulation of sebum and desquamated epithelium within a sac lined by squamous epithelium. * **Option C:** If the sebum escapes through the punctum and hardens (desiccates) on the surface, it can form a slow-growing, keratinized projection known as a **sebaceous horn**. * **Option D:** The **punctum** is a pathognomonic feature. It is a small, black opening on the skin surface representing the blocked duct orifice. It is often tethered to the underlying cyst. **High-Yield Clinical Pearls for NEET-PG:** * **Cock’s Peculiar Tumor:** This occurs when a sebaceous cyst on the scalp ulcerates and becomes infected, resembling a Squamous Cell Carcinoma (Fungating growth). * **Gardner’s Syndrome:** Multiple sebaceous (epidermoid) cysts are a known extra-intestinal manifestation of this syndrome. * **Treatment:** The gold standard is **complete surgical excision** including the cyst wall to prevent recurrence. If infected, incision and drainage (I&D) are performed first. * **Content:** The cyst contains "cheesy" material (sebum) which has a characteristic offensive odor.

Q: Interval cholecystectomy surgery is classified as which type of surgical wound?

Clean contaminated. **Explanation:** The classification of surgical wounds is based on the degree of microbial contamination at the time of surgery. **Why "Clean-Contaminated" is correct:** A **Clean-Contaminated (Class II)** wound is defined as a procedure where a hollow viscus (respiratory, alimentary, genital, or urinary tract) is entered under controlled conditions without unusual contamination. * In an **Interval Cholecystectomy**, the gallbladder is removed after an episode of acute cholecystitis has subsided (usually 6–8 weeks later). * Since the biliary tract (part of the alimentary system) is entered, but the surgery is elective, controlled, and lacks active infection or gross spillage, it fits the Class II criteria. **Analysis of Incorrect Options:** * **Clean (Class I):** These are uninfected operative wounds where no inflammation is encountered and the respiratory, alimentary, or urinary tracts are **not** entered (e.g., Hernioplasty, Thyroidectomy). * **Contaminated (Class III):** These involve open, fresh, accidental wounds or operations with major breaks in sterile technique or gross spillage from the GI tract. An *acute* cholecystitis with bile spillage would fall here. * **Dirty (Class IV):** These involve old traumatic wounds with retained devitalized tissue or existing clinical infection/perforation (e.g., perforated diverticulitis or a gallbladder abscess). **High-Yield Clinical Pearls for NEET-PG:** * **Elective Cholecystectomy:** Always Clean-Contaminated. * **Infection Rates:** Clean (<2%), Clean-Contaminated (<10%), Contaminated (15-20%), Dirty (up to 40%). * **Prophylactic Antibiotics:** Indicated for Clean-Contaminated wounds; usually not required for Clean wounds unless a prosthetic implant is used.

Q: Which of the following statements is not true of McBurney's incision?

The incision can be extended upwards or downwards.. ### Explanation **McBurney’s incision** (gridiron incision) is a muscle-splitting incision used primarily for appendicectomy. **1. Why Option D is the Correct Answer (The "Not True" Statement):** McBurney’s incision is a **muscle-splitting** incision where the fibers of the external oblique, internal oblique, and transversus abdominis are separated rather than cut. Because the fibers of these layers run in different directions, the incision is "self-closing" but **cannot be easily extended** upwards or downwards. If more exposure is required, it must be converted into a muscle-cutting incision (like Rutherford Morison) or a different approach must be used. **2. Analysis of Other Options:** * **Option A:** It is the classic approach for an appendicectomy when the diagnosis is certain. It provides direct access to the cecum and appendix. * **Option B:** If the gridiron incision is converted by cutting the internal oblique and transversus abdominis muscles laterally in the line of the skin incision, it becomes the **Rutherford Morison incision**, which provides better exposure for a retrocecal appendix or a difficult mobilization. * **Option C:** Damage to the **iliohypogastric or ilioinguinal nerves** during the incision can lead to paralysis of the conjoint tendon. This weakens the inguinal canal's posterior wall, making an **indirect inguinal hernia** a recognized late complication. ### High-Yield Clinical Pearls for NEET-PG: * **Lanz Incision:** A transverse skin incision in the right iliac fossa; it is cosmetically superior to McBurney’s as it follows Langer’s lines. * **Battle’s Incision:** A paramedian incision (rarely used now) that involves displacing the rectus muscle medially. * **Point of Incision:** McBurney’s point is located at the junction of the lateral one-third and medial two-thirds of a line joining the umbilicus to the Right Anterior Superior Iliac Spine (ASIS).

Q: A 60-year-old diabetic male presented with cough, sputum production, fever with chills, and rigor. A chest X-ray was performed. Which of the following is an indication for surgery?

All of the above. The clinical presentation of cough, fever with chills, and rigor in a diabetic patient, combined with the context of a chest X-ray, strongly suggests a **Lung Abscess** or a complicated necrotizing pneumonia. While the primary treatment for a lung abscess is medical (prolonged antibiotics and postural drainage), surgical intervention is required in approximately 10-15% of cases. ### **Explanation of Options:** * **A. Failure to respond to medical management:** This is the most common indication. If there is no clinical or radiological improvement after 4–6 weeks of appropriate antibiotic therapy, or if the cavity is >6 cm (giant abscess), surgery (lobectomy or percutaneous drainage) is indicated. * **B. Suspected neoplasm:** In an elderly patient (60 years), an abscess may develop distal to an obstructing bronchogenic carcinoma. If malignancy cannot be ruled out by imaging or bronchoscopy, surgical resection is mandatory for both diagnosis and treatment. * **C. Hemorrhage:** Massive hemoptysis (typically >600 ml/24 hours) caused by the erosion of a bronchial artery into the abscess cavity is a life-threatening emergency requiring immediate surgical intervention or bronchial artery embolization. * **D. All of the above:** Since all three scenarios represent standard surgical indications for lung abscess, this is the correct choice. ### **High-Yield Clinical Pearls for NEET-PG:** * **Primary Treatment:** Medical management (Antibiotics like Clindamycin or Beta-lactam/beta-lactamase inhibitors) is successful in 85-90% of cases. * **Other Indications for Surgery:** Bronchopleural fistula, tension pyopneumothorax, and fungal infections (e.g., Mycetoma). * **Common Organisms:** Anaerobes (most common), *Staphylococcus aureus*, and *Klebsiella pneumoniae* (especially in diabetics/alcoholics). * **Surgical Procedure of Choice:** **Lobectomy** is preferred over segmentectomy to ensure complete removal of the infected tissue.

Q: What is true about lymphangioma?

Progresses slowly and may invade local tissue. **Explanation:** Lymphangiomas are benign congenital malformations of the lymphatic system, resulting from the failure of lymphatics to connect with the venous system. **Why Option C is Correct:** Lymphangiomas are characterized by a **slow, progressive growth** pattern. While they are histologically benign (non-cancerous), they are clinically "locally invasive." They tend to infiltrate tissue planes, surrounding vital structures like nerves and blood vessels, which often makes complete surgical excision challenging. **Analysis of Incorrect Options:** * **Option A:** They are most common in the **neck (Cystic Hygroma)**, occurring in the posterior triangle (75% of cases), followed by the axilla. The pubic region is an uncommon site. * **Option B:** Lymphangiomas are **radio-resistant**. Radiotherapy is not a recommended treatment and may actually lead to complications like skin damage or secondary malignancies. * **Option D:** These are benign malformations and **do not have a recognized premalignant potential**. They do not predispose to carcinomas or sarcomas. **NEET-PG High-Yield Pearls:** * **Clinical Sign:** They are classically **brilliantly transilluminant** (especially the cystic variety). * **Classification:** Divided into Simple (capillary), Cavernous, and Cystic (Cystic Hygroma). * **Treatment of Choice:** Surgical excision is preferred, but for unresectable cases, **Sclerosants** (e.g., OK-432/Picibanil, Bleomycin, or Doxycycline) are used to shrink the lesion. * **Complications:** Sudden increase in size usually indicates secondary infection or intralesional hemorrhage.

Q: What is the most common malignancy found in Marjolin's ulcer?

Squamous cell carcinoma (SCC). **Explanation:** A **Marjolin’s ulcer** refers to a malignancy arising in a site of chronic inflammation, long-standing scars, or non-healing wounds. The most common underlying cause is a **chronic burn scar** (cicatrix), though it can also occur in chronic osteomyelitis sinuses, venous stasis ulcers, and vaccination scars. **1. Why Squamous Cell Carcinoma (SCC) is correct:** The vast majority (approximately **75–90%**) of malignancies arising in Marjolin’s ulcers are **Squamous Cell Carcinomas**. The chronic irritation and repeated cycles of tissue damage and repair lead to cellular dysplasia and eventual malignant transformation into SCC. Notably, Marjolin’s SCC is typically more aggressive and has a higher rate of lymph node metastasis compared to SCC arising from sun-damaged skin. **2. Why other options are incorrect:** * **Basal Cell Carcinoma (BCC):** While BCC is the most common skin cancer overall, it is the second most common malignancy in Marjolin’s ulcers (approx. 10%). It is less frequent than SCC in this specific clinical context. * **Malignant Melanoma & Fibrous Histiocytoma:** These are extremely rare occurrences in chronic scars and do not represent the standard presentation of a Marjolin’s ulcer. **High-Yield Clinical Pearls for NEET-PG:** * **Latency Period:** The average time for malignant transformation is **30–35 years**. * **Characteristic Feature:** A Marjolin’s ulcer typically lacks the "everted edges" seen in standard SCC; instead, it presents as a persistent ulcer with indurated borders. * **Diagnosis:** Biopsy must be taken from the **edge/margin** of the ulcer. * **Treatment:** Wide local excision (usually with a 2 cm margin) or amputation, depending on the site and depth of invasion.

Q: All are early features of generalized peritonitis except?

Hippocratic facies. **Explanation:** Generalized peritonitis is an acute inflammatory process of the peritoneum. To answer this question, one must distinguish between the **early inflammatory phase** and the **late septic/terminal phase**. **Why Hippocratic Facies is the Correct Answer:** **Hippocratic facies** is a **late/terminal feature** of generalized peritonitis. It describes a specific facial appearance—sunken eyes, hollow cheeks, pinched nose, and dry crusty lips—resulting from severe dehydration, electrolyte imbalance, and advanced sepsis. By the time this appears, the patient is usually in a state of irreversible circulatory collapse. **Analysis of Incorrect Options (Early Features):** * **Abdominal Tenderness:** This is the **earliest and most reliable sign** of peritoneal irritation. It is initially localized but becomes generalized as the underlying pathology (e.g., perforated peptic ulcer) spreads. * **Infrequent Bowel Sounds:** As the peritoneum becomes inflamed, the enteric nervous system is inhibited, leading to **adynamic ileus**. This manifests early as hypoactive or absent bowel sounds. * **Tachycardia:** An early systemic response to pain, fluid shifting (third-spacing), and the initial inflammatory cascade. **NEET-PG High-Yield Pearls:** * **Most common cause of peritonitis:** Perforation of a hollow viscus (most commonly a peptic ulcer in India). * **Rigidity:** A state of constant muscular spasm; "Board-like rigidity" is a classic sign of perforated viscus. * **Rebound Tenderness (Blumberg Sign):** Indicates parietal peritoneal irritation. * **X-ray Finding:** Pneumoperitoneum (gas under the diaphragm) is seen in ~70% of cases of perforated viscus. * **Management Priority:** Aggressive fluid resuscitation and correction of electrolytes precede surgical intervention.

Q: Infection of the thenar space is drained by incision at?

1st Webspace. **Explanation:** The **thenar space** is a deep fascial compartment of the palm, located posterior to the long flexor tendons of the index finger and anterior to the adductor pollicis muscle. It is separated from the midpalmar space by a fibrous septum attached to the 3rd metacarpal bone. **Why Option A is correct:** Infection of the thenar space (thenar space abscess) typically presents with marked swelling of the thumb web and the radial side of the palm, forcing the thumb into an abducted position. The surgical drainage is performed via an **incision in the 1st webspace** (dorsal or volar approach). This provides the most direct access to the space while avoiding injury to the recurrent branch of the median nerve (which supplies the thenar muscles) and the flexor tendons. **Why the other options are incorrect:** * **Option B & D (2nd and 3rd Webspaces):** These are used to drain **web space infections** (collar-stud abscesses) or provide access to the **midpalmar space**. The midpalmar space is typically drained via an incision in the 3rd or 4th webspace. * **Option C (Above flexor retinaculum):** This area is associated with the **carpal tunnel** or the proximal extensions of the radial and ulnar bursae (Parona’s space). It is not the anatomical site for draining the thenar space. **Clinical Pearls for NEET-PG:** * **Kanavel’s Signs:** These are diagnostic for **Flexor Tenosynovitis**, not space infections. * **Midpalmar Space Drainage:** Usually drained through an incision in the 3rd or 4th webspace or a transverse palmar incision. * **Parona’s Space:** A deep space in the distal forearm where infections from the radial or ulnar bursae can track; it is drained by a proximal forearm incision. * **Horse-shoe Abscess:** Occurs when infection spreads between the radial bursa (thumb) and ulnar bursa (little finger) via Parona's space.

Question 1

All of the following are true regarding sebaceous cysts EXCEPT:

Accepted Answer

It only occurs on the face and scalp.

Answer

It is classified as an epidermoid cyst.

Answer

If ulcerated, it can become a sebaceous horn.

Answer

It characteristically displays a punctum.

Question 2

Interval cholecystectomy surgery is classified as which type of surgical wound?

Accepted Answer

Clean contaminated

Answer

Clean

Answer

Contaminated

Answer

Dirty

Question 3

Which of the following statements is not true of McBurney's incision?

Accepted Answer

The incision can be extended upwards or downwards.

Answer

Most suitable if the diagnosis of appendicitis is definite.

Answer

If it is converted into a muscle cutting incision it is called Rutherford Morison's incision.

Answer

Inguinal hernia is a sequel of the incision.

Question 4

What is true about hypertrophic scars?

Accepted Answer

More common in blood group A

Answer

No genetic predisposition

Answer

No HLA association

Answer

Predominantly collagen type III

Question 5

What is the most commonly used suture material in oral surgical procedures?

Accepted Answer

Black silk

Answer

Chromic gut

Answer

Polygalactin

Answer

Cotton

Question 6

A 60-year-old diabetic male presented with cough, sputum production, fever with chills, and rigor. A chest X-ray was performed. Which of the following is an indication for surgery?

Accepted Answer

All of the above

Answer

Failure to respond to medical management

Answer

Suspected neoplasm

Answer

Hemorrhage

Question 7

What is true about lymphangioma?

Accepted Answer

Progresses slowly and may invade local tissue

Answer

Common in the pubic region

Answer

Responds to low doses of radiotherapy

Answer

Predisposes to cancers

Question 8

What is the most common malignancy found in Marjolin's ulcer?

Accepted Answer

Squamous cell carcinoma (SCC)

Answer

Basal cell carcinoma (BCC)

Answer

Malignant fibrous histiocytoma

Answer

Malignant melanoma

Question 9

All are early features of generalized peritonitis except?

Accepted Answer

Hippocratic facies

Answer

Abdominal tenderness

Answer

Infrequent bowel sounds

Answer

Tachycardia

Question 10

Infection of the thenar space is drained by incision at?

Accepted Answer

1st Webspace

Answer

2nd Webspace

Answer

Just above flexor retinaculum

Answer

3rd Webspace

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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