General Surgery Principles Practice Questions

Q: All are the features of rheumatoid arthritis except?

Osteosclerosis of joint. **Explanation:** The hallmark of **Rheumatoid Arthritis (RA)** is chronic, symmetrical inflammatory synovitis. Because it is an **inflammatory** (non-weight-bearing) arthritis, it is characterized by bone loss rather than bone formation. **Why Option A is the Correct Answer:** **Osteosclerosis** (increased bone density/thickening) is a feature of **Osteoarthritis (OA)**, not RA. In OA, the mechanical stress on subchondral bone leads to sclerosis and osteophyte formation. In contrast, RA involves inflammatory cytokines (like TNF-α and IL-1) that activate osteoclasts, leading to bone erosion and decreased density. **Analysis of Incorrect Options:** * **B. Soft tissue swelling:** This is the earliest radiographic sign of RA, caused by synovial hypertrophy and effusion (pannus formation). * **C. Narrowing of joint space:** As the pannus destroys the articular cartilage, the space between the bones decreases symmetrically. * **D. Periarticular osteoporosis:** This is a classic early radiological feature of RA. Inflammatory hyperemia leads to local bone resorption near the affected joint before generalized bone loss occurs. **NEET-PG High-Yield Pearls:** * **Radiological Hallmarks of RA:** (1) Soft tissue swelling, (2) Periarticular osteopenia/osteoporosis, (3) Symmetrical joint space narrowing, and (4) Marginal erosions (Rat-bite erosions). * **Joints Spared:** RA typically **spares the Distal Interphalangeal (DIP) joints** and the thoracolumbar spine (except C1-C2). * **Key Deformities:** Swan-neck deformity, Boutonniere deformity, and Z-deformity of the thumb. * **Serology:** Anti-CCP (Cyclic Citrullinated Peptide) is more specific than Rheumatoid Factor (RF).

Q: An ulcer with undermined edges is seen in which condition?

Tubercular ulcer. **Explanation:** The morphology of an ulcer's edge is a high-yield diagnostic feature in surgery. An **undermined edge** is the hallmark of a **Tubercular ulcer**. This occurs because the tubercular process (caseous necrosis) originates in the subcutaneous plane or lymph nodes. As the infection destroys the subcutaneous tissue more rapidly than the overlying skin, the skin edges are left hanging over the floor of the ulcer, creating a "pocket" or undermining effect. **Analysis of Options:** * **Malignant Ulcer (Option A):** Characteristically presents with **everted (rolled-out) edges**. This is due to the rapid proliferation of neoplastic cells at the periphery, which outgrows the center and spills over the normal skin. * **Venous Ulcer (Option B):** Typically presents with **sloping edges**. These are usually shallow ulcers found in the "gaiter area" (medial malleolus) and heal by the gradual inward migration of epithelium. * **Diabetic/Trophic Ulcer (Option D):** Characterized by **punched-out edges**. These are deep, circular ulcers resulting from repeated trauma to insensitive (neuropathic) skin, often seen on the sole of the foot. **High-Yield Clinical Pearls for NEET-PG:** * **Undermined edge:** Tuberculosis. * **Punched-out edge:** Syphilis (Gummatous ulcer), Deep Trophic/Diabetic ulcers. * **Everted edge:** Squamous cell carcinoma (Marjolin’s ulcer). * **Rolled-in/Beaded edge:** Basal cell carcinoma (Rodent ulcer). * **Sloping edge:** Healing traumatic or venous ulcer.

Q: Schwann cells are derived from:

Neural crest cells. **Explanation:** The correct answer is **Neural crest cells**. Schwann cells are the primary glial cells of the peripheral nervous system (PNS), responsible for myelinating peripheral axons. During embryogenesis, the neural plate folds to form the neural tube; however, a specific population of cells at the "crests" of these folds migrates throughout the body. These **neural crest cells** are multipotent and give rise to various structures, including the sensory and autonomic ganglia, adrenal medulla, melanocytes, and Schwann cells. **Analysis of Incorrect Options:** * **Endoderm:** This layer primarily gives rise to the epithelial lining of the gastrointestinal and respiratory tracts, as well as organs like the liver and pancreas. * **Mesoderm:** This layer forms the "middle" structures, including muscles, bones, the circulatory system, dermis, and the urogenital system. * **Ectoderm:** While the nervous system originates from the ectoderm, it is specifically divided into the **surface ectoderm** (epidermis, lens) and **neuroectoderm**. The neuroectoderm further differentiates into the **neural tube** (CNS: brain, spinal cord, oligodendrocytes) and **neural crest cells** (PNS: Schwann cells). **Clinical Pearls for NEET-PG:** * **Schwannoma vs. Neurofibroma:** Both are nerve sheath tumors derived from Schwann cells. Schwannomas are typically encapsulated and push the nerve aside, while neurofibromas are unencapsulated and infiltrate the nerve. * **Myelination:** Remember that **Schwann cells** myelinate a single axon in the PNS, whereas **Oligodendrocytes** (derived from the neural tube) myelinate multiple axons in the CNS. * **Acoustic Neuroma:** This is a vestibular schwannoma (CN VIII) and is a classic high-yield association with Neurofibromatosis Type 2 (NF2).

Q: Identify the suturing technique shown in the image.

Simple Interrupted suture. ***Simple Interrupted suture*** - The image shows multiple individual stitches, each placed and tied separately. This is the defining characteristic of the **simple interrupted** technique. - This method provides excellent **wound edge approximation** and allows for the removal of individual sutures if a wound infection develops. *Vertical Mattress* - This technique uses a **"far-far, near-near"** bite pattern in a vertical plane to strongly evert wound edges, which is not depicted. - It is ideal for closing wounds under tension or on lax skin, such as the neck or areas over joints. *Horizontal mattress* - A horizontal mattress suture runs **parallel** to the wound incision line, creating a "box stitch" appearance. The sutures in the image are perpendicular. - It is used for **everting** wound edges and can also act as a temporary tension-relieving stitch. *Subcuticular suture* - This technique involves placing sutures within the **dermis** layer, with no external suture material visible except at the entry and exit points. - It provides superior **cosmetic outcomes** by eliminating skin suture marks, which is clearly not the case in the illustrated technique.

Q: Identify the type of suture?

Simple Interrupted suture. ***Simple Interrupted suture*** - The image displays multiple, separate sutures, each individually placed and tied, which is characteristic of the **simple interrupted** technique. - This is the most common suturing method, providing good **wound apposition** and allowing for selective removal of single sutures if a localized infection develops. *Vertical Mattress* - A **vertical mattress suture** involves a 'far-far, near-near' stitching pattern in a plane perpendicular to the wound, which is not depicted in the image. - This technique is specifically used for everting wound edges and closing wounds under tension, creating a different surface appearance. *Horizontal mattress* - A **horizontal mattress suture** runs parallel to the wound edge on the skin surface, creating a box-like stitch to distribute tension. - It is primarily used for wounds under high tension or for providing **hemostasis**, and its appearance is distinctly different from the simple loops shown. *Subcuticular suture* - A **subcuticular suture** is placed entirely within the dermis, leaving no visible suture material on the skin surface except for the entry and exit points. - This method is used for optimal cosmetic results, whereas the image clearly shows external knots for each individual stitch.

Q: A 20-year-old male presents to the outpatient department with a swelling on his wrist. He reports fluctuation in size, mild numbness in the hand, and occasional pain. What is the most likely diagnosis?

Ganglion cyst. ***Ganglion cyst*** - This is the most common benign soft-tissue tumor of the hand and wrist, often arising from a **joint capsule** or **tendon sheath**. The classic presentation includes a smooth, round swelling on the wrist that can fluctuate in size. - Symptoms like mild pain and numbness can occur due to **nerve compression**, which is consistent with the patient's presentation. On examination, they are typically firm and **transilluminate**. *Lipoma* - A lipoma is a benign tumor composed of **adipose tissue** (fat). It typically presents as a soft, mobile, and “doughy” subcutaneous mass, which differs from the usually firm consistency of a ganglion cyst. - Lipomas do not fluctuate in size and are less likely to be found on the dorsal aspect of the wrist compared to ganglion cysts. *Dermoid cyst* - A dermoid cyst is a **congenital** lesion (a type of teratoma) containing dermal structures like hair follicles and sebaceous glands. They are most commonly found in the midline, face, or neck. - Their presence on the wrist is extremely rare, and they do not typically fluctuate in size like a ganglion cyst. *Hematoma* - A hematoma is a localized collection of blood, usually resulting from **trauma**. The patient's history does not mention any injury. - An acute hematoma would be tender and associated with **ecchymosis** (bruising), and it would be expected to resolve over time rather than fluctuate.

Q: Identify the part of the ulcer indicated by the arrow in the image.

Edge. ***Edge*** - The arrow correctly identifies the **edge** of the ulcer, which is the **side wall extending from the margin down to the floor**. - The characteristics of the edge (e.g., sloping, punched-out, undermined, rolled, everted) are crucial for determining the ulcer's etiology and whether it is healing or progressing. - Edge characteristics help differentiate between **healing ulcers** (sloping edge), **tuberculous ulcers** (undermined edge), **malignant ulcers** (everted/rolled edge), and **syphilitic ulcers** (punched-out edge). *Margin* - The **margin** is the junction line that separates the ulcer from the surrounding normal tissue. - It represents the **outermost perimeter** of the ulcer. The arrow points inside this boundary, specifically to the wall of the ulcer, not the margin itself. *Floor* - The **floor** is the visible **bottom surface** of the ulcer crater, composed of exposed subcutaneous tissue or deeper structures. - The arrow is pointing to the **side wall**, not the bottom surface. - The floor can be covered by healthy granulation tissue (pink, healing), slough (yellow), or necrotic debris (black eschar). *Base* - The **base** refers to the **tissue upon which the ulcer rests** and is assessed by **palpation**, not visualization. - It describes the deep aspect beneath the floor - can be indurated (hardened, suggests malignancy), mobile, or fixed to deeper structures like fascia, tendon, or bone.

Q: The given image shows an ulcer. Identify the marked structure.

Edge. ***Edge*** - The marked structure represents the side of the ulcer, connecting the **margin** to the **floor**, which is correctly termed the **edge**. - The characteristics of the edge (e.g., sloping, punched-out, undermined) are crucial for determining the ulcer's etiology, such as in **tuberculous ulcers** (undermined) or **malignant ulcers** (everted). *Margin* - The **margin** is the area of skin immediately surrounding the ulcer, essentially the "rim" on the surface. - The arrow is pointing into the crater of the ulcer, not the tissue around its periphery. *Floor* - The **floor** is the bottom, visible surface of the ulcer crater itself. - The marked structure is the wall leading down to the floor, not the floor itself. *Base* - The **base** is the tissue deep to the ulcer, upon which it rests, and is typically assessed by palpation for induration. - It is not a visible structure on inspection, unlike the edge which is clearly marked in the diagram.

Q: A 25-year-old patient presents to the surgical OPD with a painless left inguinal reducible mass. On examination cough impulse is positive. After further investigations, the patient is diagnosed with an inguinal hernia. What is the surgical management of this patient?

b.Hernioplasty. ***Hernioplasty***- **Hernioplasty**, which utilizes a prosthetic mesh (e.g., **Lichtenstein technique**), is the universally accepted standard for repairing adult inguinal hernias to achieve a tension-free repair.- This method provides a **tension-free repair** of the posterior inguinal wall, leading to significantly lower recurrence rates compared to traditional suture repairs.*Herniotomy*- **Herniotomy** involves only the excision of the hernia sac and is typically reserved for **indirect inguinal hernias in children**, where the muscle wall is robust.- In an adult, failing to repair the inherent weakness of the **inguinal canal floor** after sac removal results in an unacceptably high risk of hernia recurrence.*Wait and watch*- This approach is mainly reserved for **elderly or comorbid patients** with minimally symptomatic or asymptomatic reducible hernias who are considered high risk for surgery.- For a fit 25-year-old, surgery is recommended to prevent future potentially life-threatening complications like **strangulation** or chronic pain.*Emergency laparotomy*- A full **laparotomy** is an extensive abdominal incision utilized for exploring the acute abdomen or managing complicated intra-abdominal sepsis.- This procedure is unnecessary as the hernia is described as **reducible** and **painless**, indicating an elective repair is warranted, not an emergency exploration.

Q: Identify the given instrument.

Linear stapler. ***Linear stapler*** - The instrument shown has a long shaft with two jaws that apply staples in a straight line, which is characteristic of a **linear stapler**. - It is primarily used in **abdominal** and **thoracic surgery** for transecting tissue or closing internal organs like the stomach, intestines, or lung parenchyma. *Skin stapler* - A **skin stapler** is a much smaller, handheld device used exclusively for closing skin incisions externally and has a distinctly different appearance. - It applies single, wide staples and is not used for internal tissue anastomosis or transection. *Circular stapler* - A **circular stapler** has a round head at the distal end designed to create a circular, end-to-end anastomosis, typically in **colorectal** or **esophageal** surgery. - The instrument in the image lacks this circular head and is designed for a linear staple line. *Curved stapler* - This term most commonly refers to a **circular stapler** or a **curved linear cutter**, which has a curved head to facilitate access in locations like the pelvis. - The instrument shown has straight jaws, not a curved head, and is designed for creating a straight line of staples.

Question 1

All are the features of rheumatoid arthritis except?

Accepted Answer

Osteosclerosis of joint

Answer

Soft tissue swelling

Answer

Narrowing of joint space

Answer

Periarticular osteoporosis

Question 2

An ulcer with undermined edges is seen in which condition?

Accepted Answer

Tubercular ulcer

Answer

Malignant ulcer

Answer

Venous ulcer

Answer

Diabetic ulcer

Question 3

Schwann cells are derived from:

Accepted Answer

Neural crest cells

Answer

Endoderm

Answer

Mesoderm

Answer

Ectoderm

Question 4

Identify the suturing technique shown in the image.

Accepted Answer

Simple Interrupted suture

Answer

Vertical Mattress

Answer

Subcuticular suture

Answer

Horizontal mattress

Question 5

Identify the type of suture?

Accepted Answer

Simple Interrupted suture

Answer

Horizontal mattress

Answer

Vertical Mattress

Answer

Subcuticular suture

Question 6

A 20-year-old male presents to the outpatient department with a swelling on his wrist. He reports fluctuation in size, mild numbness in the hand, and occasional pain. What is the most likely diagnosis?

Accepted Answer

Ganglion cyst

Answer

Dermoid cyst

Answer

Lipoma

Answer

Hematoma

Question 7

Identify the part of the ulcer indicated by the arrow in the image.

Accepted Answer

Edge

Answer

Floor

Answer

Margin

Answer

Base

Question 8

The given image shows an ulcer. Identify the marked structure.

Accepted Answer

Edge

Answer

Base

Answer

Floor

Answer

Margin

Question 9

A 25-year-old patient presents to the surgical OPD with a painless left inguinal reducible mass. On examination cough impulse is positive. After further investigations, the patient is diagnosed with an inguinal hernia. What is the surgical management of this patient?

Accepted Answer

b.Hernioplasty

Answer

a.Herniotomy

Answer

c.Wait and watch

Answer

d.Emergency laparotomy

Question 10

Identify the given instrument.

Accepted Answer

Linear stapler

Answer

Curved stapler

Answer

Circular stapler

Answer

Skin stapler

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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