General Surgery Principles Practice Questions

Q: Non-blanchable erythema of the skin is classified as which stage of a decubitus ulcer?

Stage I. **Explanation:** Decubitus ulcers (pressure sores) are staged based on the depth of tissue involvement according to the National Pressure Ulcer Advisory Panel (NPUAP) guidelines. **1. Why Stage I is correct:** **Stage I** is characterized by **non-blanchable erythema** of intact skin. This means that when pressure is applied to the reddened area, it does not turn white (blanch), indicating that microvascular damage has occurred but the skin barrier remains intact. It is the earliest clinically recognizable stage of a pressure ulcer. **2. Why other options are incorrect:** * **Stage II:** Involves **partial-thickness skin loss** involving the epidermis, dermis, or both. It clinically presents as a shallow open ulcer with a red-pink wound bed or as an intact/ruptured serum-filled blister. * **Stage III:** Involves **full-thickness skin loss**. Subcutaneous fat may be visible, but bone, tendon, or muscle are NOT exposed. Slough may be present. * **Stage IV:** Involves **full-thickness tissue loss** with exposed bone, tendon, or muscle. Osteomyelitis is a common complication at this stage. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** The **Sacrum** is the most common site overall, followed by the ischial tuberosity and greater trochanter. * **Unstageable Ulcer:** If the wound bed is covered by slough or eschar such that the true depth cannot be determined, it is classified as "Unstageable." * **Deep Tissue Injury (DTI):** Presents as a purple or maroon localized area of discolored intact skin or a blood-filled blister due to damage of underlying soft tissue. * **Prevention:** The most effective preventive measure is frequent repositioning (every 2 hours).

Q: Odontoma is treated by:

Excision. **Explanation:** **Odontomas** are the most common odontogenic tumors. They are technically considered **hamartomas** (developmental malformations of dental tissues) rather than true neoplasms. They consist of enamel, dentin, cementum, and pulp tissue. 1. **Why Excision is Correct:** Odontomas are typically well-encapsulated and separated from the surrounding bone by a thin layer of fibrous connective tissue. Because they are benign, slow-growing, and non-invasive, **simple surgical excision (enucleation)** is the definitive treatment. Once the lesion and its surrounding capsule are removed, the recurrence rate is nearly zero. 2. **Why Incorrect Options are Wrong:** * **Resection:** This involves removing the lesion along with a margin of healthy bone (e.g., segmental resection). This is unnecessarily aggressive for a benign, encapsulated hamartoma like an odontoma and is reserved for aggressive or malignant tumors (e.g., Ameloblastoma). * **Curettage:** While similar to excision, pure curettage (scraping) without removing the entire capsule may lead to incomplete removal of dental fragments. Excision/Enucleation is the standard term for removing the mass in its entirety. * **Radiotherapy:** Odontomas are radioresistant. Radiation is contraindicated for benign dental lesions due to the risk of osteoradionecrosis and secondary malignancies. **NEET-PG High-Yield Pearls:** * **Types:** * **Compound Odontoma:** Multiple small tooth-like structures (denticles); most common in the **anterior maxilla**. * **Complex Odontoma:** An amorphous mass of dental tissue; most common in the **posterior mandible**. * **Radiographic Appearance:** A radiopaque mass surrounded by a narrow **radiolucent halo** (the capsule). * **Clinical Presentation:** Often associated with a **retained deciduous tooth** or an **unerupted permanent tooth**.

Q: Which of the following suture materials is absorbable?

Polyglactine. **Explanation:** Suture materials are broadly classified into **absorbable** (broken down by the body via hydrolysis or enzymatic digestion) and **non-absorbable** (remain permanently or require manual removal). **Correct Answer: A. Polyglactine** Polyglactine 910 (commonly known by the brand name **Vicryl**) is a synthetic, braided, multifilament **absorbable** suture. It is composed of a copolymer of glycolide and lactide. It is degraded by **hydrolysis**, maintaining significant tensile strength for approximately 3–4 weeks and being completely absorbed within 60–90 days. It is widely used for soft tissue approximation and ligation. **Analysis of Incorrect Options:** * **B. Polypropylene (Prolene):** A synthetic, monofilament **non-absorbable** suture. It has the lowest rates of infection and is the material of choice for vascular anastomoses and skin closure (subcuticular). * **C. Polyethylene:** A synthetic **non-absorbable** suture often used in orthopedic surgeries (e.g., tendon repairs) due to its high tensile strength. * **D. Polybutester (Novafil):** A synthetic **non-absorbable** monofilament suture known for its high elasticity, making it ideal for wound closure where significant edema is expected. **High-Yield Clinical Pearls for NEET-PG:** * **Natural Absorbable:** Catgut (derived from bovine/ovine submucosa). Note: Chromic catgut is treated with chromium salts to delay absorption. * **Fastest Absorbing:** Catgut (5–7 days); **Slowest Absorbing Synthetic:** Polydioxanone (PDS), which takes about 180–210 days. * **Suture of choice for Biliary/Urinary tracts:** Absorbable sutures (to prevent them from acting as a nidus for stone formation). * **Suture of choice for contaminated wounds:** Monofilament (to prevent "wicking" of bacteria seen in braided sutures).

Q: Using monopolar cautery during circumcision in children is not advised due to the risk of penile coagulation. What is the mechanism behind this phenomenon?

Channeling. **Explanation:** The correct answer is **Channeling (Option A)**. In monopolar cautery, the electrical current travels from the active electrode, through the patient’s body, to a return plate (grounding pad). When used on a narrow, terminal appendage like the penis—especially in children—the current becomes concentrated as it travels through the narrow base of the organ. This "channeling" effect leads to high current density, causing unintended thermal injury, thrombosis of the dorsal penile arteries, and subsequent total penile necrosis or gangrene. For this reason, bipolar cautery or cold dissection is preferred for circumcision. **Analysis of Incorrect Options:** * **B. Capacitance Coupling:** This occurs when current is transferred from an active electrode through intact insulation into adjacent non-target tissues (common in laparoscopy). It is not the primary mechanism of injury in circumcision. * **C. Electrocution:** This refers to a fatal or severe electric shock caused by current passing through the heart or brain, rather than localized tissue coagulation. * **D. Explosion:** This is a risk when cautery is used in the presence of flammable gases (e.g., bowel gas containing methane/hydrogen or alcohol-based skin preps), but it does not describe the mechanism of penile necrosis. **High-Yield Clinical Pearls for NEET-PG:** * **Bipolar Cautery:** Safer for terminal appendages because the current only flows between the two tips of the forceps, eliminating the channeling effect. * **Pacemakers:** Monopolar cautery can interfere with pacemakers; always use bipolar or place the grounding pad far from the heart. * **Direct Coupling:** Occurs when the active electrode accidentally touches another conductive instrument (e.g., a laparoscope), causing injury at a distant site.

Q: What is the name of the retractor shown in the image?

Deaver retractor. ***Deaver retractor*** - Features a **large curved flat blade** with a **right-angle handle**, making it ideal for retracting heavy organs like the liver during abdominal surgery. - Commonly used in **laparotomy** procedures to provide excellent exposure of deep abdominal structures. *Richardson retractor* - Has a **straight blade** with a curved handle, unlike the distinctive right-angle configuration of the Deaver. - Primarily used for **superficial tissue retraction** rather than deep organ manipulation. *Malleable retractor* - Made of **flexible metal** that can be bent and shaped according to surgical needs during the procedure. - Lacks the **rigid curved blade** and fixed right-angle handle characteristic of the Deaver retractor. *Goulet retractor* - Features **multiple prongs** or **teeth** for grasping tissue, completely different from the smooth blade design. - Used for **tissue grasping** rather than the broad retraction provided by flat-bladed retractors.

Q: What is the most common type of cyst found in the spleen?

Pseudocyst. **Explanation:** Splenic cysts are broadly classified into **Primary (True) cysts**, which possess an epithelial lining, and **Secondary (False) cysts**, which lack one. **Why Pseudocyst is correct:** Pseudocysts (Secondary cysts) are the **most common** type of splenic cyst, accounting for approximately **75-80%** of all non-parasitic splenic cysts. They typically develop as a late complication of **trauma** (post-traumatic), though they can also result from splenic infarction or infection. Because they lack a cellular lining and are composed of fibrous tissue, they are termed "pseudocysts." **Analysis of Incorrect Options:** * **Hydatid Cyst (Option A):** Caused by *Echinococcus granulosus*, this is the most common **parasitic** cyst of the spleen. While common in endemic areas, it is less frequent globally than post-traumatic pseudocysts. * **Dermoid Cyst (Option B):** These are extremely rare primary (true) cysts of the spleen. They are congenital and contain skin appendages. * **Lymphangioma (Option C):** This is a benign malformation of the lymphatic system. While it is the most common **primary benign neoplasm** of the spleen that can appear cystic, it is not the most common splenic cyst overall. **High-Yield Clinical Pearls for NEET-PG:** * **True Cysts:** Most common is the **Epidermoid cyst** (congenital, possesses epithelial lining, often positive for CEA or CA 125). * **Imaging:** Ultrasound is the first-line investigation; CT is used for surgical planning. * **Management:** Small, asymptomatic cysts (<5 cm) are managed conservatively. Large or symptomatic cysts require **Spleen-preserving surgery** (e.g., partial splenectomy or cyst decortication) to avoid Post-Splenectomy Overwhelming Infection (OPSI).

Q: Marjolin's ulcer is a:

Malignant ulcer found on the scar of a burn. **Explanation:** **Marjolin’s ulcer** refers to a squamous cell carcinoma (SCC) that arises in areas of chronic inflammation, long-standing scars, or non-healing wounds. The most classic and high-yield association is with **post-burn scars** (cicatrix). 1. **Why Option A is correct:** Chronic irritation and poor lymphatic drainage in a dense burn scar lead to repeated tissue breakdown and repair. Over a long latent period (average 25–30 years), this cellular stress triggers malignant transformation, typically into a well-differentiated squamous cell carcinoma. 2. **Why other options are incorrect:** * **Option B:** While SCC can occur in chronic osteomyelitis sinuses or diabetic foot ulcers, the specific eponym "Marjolin’s" is most strictly tied to scar-based malignancy. * **Option C:** A **Trophic ulcer** (Punched-out ulcer) is a neurotrophic ulcer caused by pressure in a denervated area (e.g., Leprosy or Diabetes), not a malignancy. * **Option D:** **Meleney’s gangrene** is a synergistic bacterial gangrene of the abdominal wall, usually following surgery; it is an infective process, not neoplastic. **Clinical Pearls for NEET-PG:** * **Most common histological type:** Squamous Cell Carcinoma (SCC). * **Characteristics:** It is typically **painless** (as the scar lacks sensory nerves), has everted edges, and is **slow to metastasize** because the dense scar tissue limits lymphatic spread. However, once it spreads, the prognosis is poor. * **Management:** Wide local excision (2 cm margin) is the treatment of choice. * **Latent Period:** Can be "Acute" (within 1 year) or "Chronic" (most common).

Q: Which of the following has an increased risk?

Squamous cell carcinoma. ***Squamous cell carcinoma*** - **Marjolin's ulcer** develops from chronic wounds, burn scars, or chronic inflammatory conditions, with **squamous cell carcinoma** being the most common malignant transformation. - The **chronic inflammation** and repetitive tissue damage create an environment that promotes **malignant transformation** of squamous epithelial cells, typically after a latency period of **10-20 years**. *Basal cell carcinoma* - **BCC** typically arises from **sun-exposed skin** in fair-skinned individuals and is not associated with chronic wounds or burn scars. - **Chronic ulcers** and **inflammatory conditions** do not predispose to basal cell carcinoma development. *Melanoma* - **Melanoma** arises from **melanocytes** and is primarily associated with **UV exposure**, **atypical moles**, and **genetic factors**. - **Chronic wounds** and **burn scars** do not increase the risk of melanoma as they lack the melanocytic component necessary for this malignancy. *Liposarcoma* - **Liposarcoma** is a **soft tissue sarcoma** arising from **adipose tissue** and is not related to chronic wounds or epithelial damage. - **Marjolin's ulcer** specifically involves **epithelial malignant transformation**, not mesenchymal tissue sarcomas like liposarcoma.

Q: Malignant change in lipoma is most common in which anatomical location?

Retroperitoneum. **Explanation:** The correct answer is **Retroperitoneum**. **Underlying Medical Concept:** Lipomas are the most common benign mesenchymal tumors and are typically composed of mature adipocytes. While the vast majority of lipomas are benign and do not undergo malignant transformation, those located in the **retroperitoneum** are the exception. In this anatomical space, what appears to be a simple lipoma is often a **Well-Differentiated Liposarcoma (WDL)** from the outset. True malignant transformation of a pre-existing subcutaneous lipoma is exceedingly rare; however, deep-seated lipomatous masses, particularly in the retroperitoneum, carry a high risk of being or becoming malignant (Liposarcoma). **Analysis of Options:** * **Retroperitoneum (Correct):** This is the most common site for liposarcomas. Any large lipomatous mass in this region should be treated as malignant until proven otherwise. * **Thigh (Incorrect):** While the thigh is a common site for both lipomas and sarcomas, the rate of malignant change in a superficial thigh lipoma is negligible compared to the retroperitoneum. * **Nape of neck & Back (Incorrect):** These are classic sites for subcutaneous "universal" lipomas. These are almost always benign and rarely, if ever, undergo malignant transformation. **High-Yield Clinical Pearls for NEET-PG:** * **Most common soft tissue sarcoma in adults:** Liposarcoma. * **Most common histological variant:** Well-differentiated liposarcoma. * **Clinical Sign:** A lipoma that suddenly increases in size, becomes painful, or feels fixed/hard should raise suspicion of malignancy. * **Investigation of Choice:** MRI is the gold standard for evaluating the extent and characteristics of lipomatous tumors. * **Cytogenetics:** Well-differentiated liposarcomas are often associated with the amplification of the **MDM2** gene.

Q: A 70-year-old, moderately obese woman presents with a large midline incisional hernia. She underwent colon resection for adenocarcinoma one year previously. Which of the following statements is truest regarding her condition?

Laparoscopic repair with mesh can be performed.. **Explanation:** **1. Why Option A is Correct:** Laparoscopic Incisional and Ventral Hernia Repair (LIVHR) is a well-established technique. In a 70-year-old obese patient, laparoscopy is often preferred over open surgery as it reduces the risk of wound-related complications (infection, dehiscence), which are common in obese individuals. The use of **Intraperitoneal Onlay Mesh (IPOM)**—typically a composite mesh to prevent bowel adhesions—is the standard of care in laparoscopic repair to provide tension-free closure. **2. Why the Other Options are Incorrect:** * **Option B:** Incisional hernia repairs are complex procedures, especially in obese patients with large defects. They require significant dissection and often involve adhesiolysis from previous surgeries. Therefore, they are performed under **General Anesthesia**, not local anesthesia. * **Option C:** **Incisional hernias** are actually the most common type of ventral/parietal wall hernias encountered in clinical practice (occurring in 10-15% of abdominal incisions), whereas epigastric hernias are less frequent. * **Option D:** Open surgery (such as the **Sublay/Rives-Stoppa technique**) remains a "gold standard" for many incisional hernias. It is certainly possible and often necessary for very large or incarcerated hernias. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Obesity, wound infection (the most significant factor), DM, and old age are primary drivers for incisional hernias. * **Mesh Placement:** The **Sublay (retro-rectus)** position is considered the most mechanically sound position for open repair. * **Laparoscopic Advantage:** Lower incidence of Surgical Site Infections (SSI) compared to open repair. * **Dual Mesh:** In laparoscopic repair (IPOM), the mesh must have a non-adherent barrier (e.g., PTFE or collagen) on the visceral side to prevent "mesh-bowel" fistulas.

Question 1

Non-blanchable erythema of the skin is classified as which stage of a decubitus ulcer?

Accepted Answer

Stage I

Answer

Stage II

Answer

Stage III

Answer

Stage IV

Question 2

Odontoma is treated by:

Accepted Answer

Excision

Answer

Resection

Answer

Curettage

Answer

Radiotherapy

Question 3

Which of the following suture materials is absorbable?

Accepted Answer

Polyglactine

Answer

Polypropylene

Answer

Polyethylene

Answer

Polybutester

Question 4

Using monopolar cautery during circumcision in children is not advised due to the risk of penile coagulation. What is the mechanism behind this phenomenon?

Accepted Answer

Channeling

Answer

Capacitance coupling

Answer

Electrocution

Answer

Explosion

Question 5

What is the name of the retractor shown in the image?

Accepted Answer

Deaver retractor

Answer

Richardson retractor

Answer

Malleable retractor

Answer

Goulet retractor

Question 6

What is the most common type of cyst found in the spleen?

Accepted Answer

Pseudocyst

Answer

Hydatid cyst

Answer

Dermoid cyst

Answer

Lymphangioma

Question 7

Marjolin's ulcer is a:

Accepted Answer

Malignant ulcer found on the scar of a burn

Answer

Malignant ulcer found on an infected foot

Answer

Trophic ulcer

Answer

Meleney's gangrene

Question 8

Which of the following has an increased risk?

Accepted Answer

Squamous cell carcinoma

Answer

Basal cell carcinoma

Answer

Melanoma

Answer

Liposarcoma

Question 9

Malignant change in lipoma is most common in which anatomical location?

Accepted Answer

Retroperitoneum

Answer

Thigh

Answer

Nape of neck

Answer

Back

Question 10

A 70-year-old, moderately obese woman presents with a large midline incisional hernia. She underwent colon resection for adenocarcinoma one year previously. Which of the following statements is truest regarding her condition?

Accepted Answer

Laparoscopic repair with mesh can be performed.

Answer

Surgical repair is simple and can be done under local anesthesia.

Answer

Epigastric hernia is the most common type among parietal wall hernias.

Answer

Open surgery for incisional hernia is not possible.

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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