Plastic and Reconstructive Surgery Practice Questions

Q: A bilobed graft is typically used in which of the following anatomical locations?

Nose. **Explanation:** The **Bilobed Flap** (often referred to as a bilobed graft in clinical shorthand, though technically a transposition flap) is a double-lobed local transposition flap. It is the "gold standard" for reconstructing small to medium-sized defects (up to 1.5 cm) on the **Nose**, particularly the nasal tip and alar sidewall. **1. Why the Nose is Correct:** The primary challenge of nasal reconstruction is the lack of redundant skin. The bilobed flap solves this by recruiting skin from the upper nasal bridge (where there is more laxity) and transferring it in two stages. The first lobe fills the primary defect, and the second lobe fills the site of the first lobe. This distributes tension over a wider area, preventing distortion of the nasal tip or alar rim. **2. Why other options are incorrect:** * **Eyelid:** Reconstructed using techniques like the **Hughes flap** (tarsoconjunctival) or **Tripier flap** (musculocutaneous). The skin here is very thin, and a bilobed flap would be too bulky. * **Cheek:** Usually managed with primary closure, **Mustarde flaps**, or large rotation flaps due to the significant amount of available skin laxity. * **Fingertips:** Commonly reconstructed using **V-Y advancement flaps** (Atasoy/Kutler) or **Moberg flaps**. **Clinical Pearls for NEET-PG:** * **Design:** Originally described by **Esser** (90°/90° angles), later modified by **Zitelli** (45°/45° angles) to reduce "dog-ear" deformity and "pincushioning." * **Key Advantage:** It allows for the movement of skin around a pivot point to areas with zero laxity. * **High-Yield Association:** Whenever you see "Nasal Tip Reconstruction <1.5cm," think **Bilobed Flap**.

Q: Split skin graft take-up is good if:

Light compression wraps are applied as dressing.. ### Explanation The success of a Split-Thickness Skin Graft (STSG) depends on the graft remaining in intimate contact with a vascularized wound bed to allow for **plasmatic imbibition** (initial 24–48 hours) and subsequent **neovascularization** (inosculation). **Why Option B is Correct:** Light compression wraps (often applied as a **Tie-over/Bolster dressing**) are crucial for graft "take." They serve three primary functions: 1. **Immobilization:** Prevents shearing forces that can disrupt delicate new capillary connections. 2. **Elimination of Dead Space:** Ensures constant contact between the graft and the recipient bed. 3. **Prevention of Hematoma/Seroma:** Minimizes fluid accumulation under the graft, which is the most common cause of graft failure. **Why the Other Options are Incorrect:** * **A. Avascular wound bed:** Grafts require a vascular supply (like granulation tissue, periosteum, or perichondrium) to survive. They will not "take" on avascular structures like bare bone, bare tendon, or infected necrotic tissue. * **C. Purulent discharge:** Infection is a major contraindication. Bacteria (especially *Streptococcus pyogenes* and *Pseudomonas*) produce enzymes like fibrinolysins that dissolve the fibrin bond between the graft and the bed, leading to failure. * **D. Insensitive wound area:** The sensory status of the wound bed does not influence the biological process of revascularization. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Graft Take:** 1. Plasmatic Imbibition (0–48h) → 2. Inosculation (48h–72h) → 3. Revascularization/Angiogenesis (Day 4+). * **Most common cause of graft failure:** Hematoma formation. * **Most common organism causing failure:** *Beta-hemolytic Streptococcus*. * **STSG vs. FTSG:** STSG has a better "take" rate and can cover larger areas, but undergoes more **secondary contraction** compared to Full-Thickness Skin Grafts (FTSG).

Q: What is Cock's peculiar tumor?

Ulcerated sebaceous cyst. **Explanation:** **Cock’s Peculiar Tumor** is a clinical misnomer. It is not a true neoplastic malignancy but rather an **infected and ulcerated sebaceous cyst**, typically occurring on the **scalp**. **Why C is correct:** When a sebaceous cyst on the scalp undergoes infection, it can rupture and ulcerate. The lining of the cyst (the sebaceous material and granulation tissue) protrudes through the opening, creating a fungating, exuberant mass that mimics the appearance of a malignant tumor (specifically Squamous Cell Carcinoma). Despite its alarming, "fleshy" appearance, it remains a benign inflammatory condition. **Why the other options are incorrect:** * **Basal Cell Carcinoma (A):** While BCC is common on the face (Rodent ulcer), it typically presents with pearly borders and telangiectasia, not as a fungating mass arising from a pre-existing cyst. * **Squamous Cell Carcinoma (B):** This is the most common differential diagnosis. SCC presents with everted edges and induration. While Cock’s tumor mimics SCC clinically, histological examination reveals only inflammatory changes and cyst remnants. * **Cylindroma (D):** Also known as a "Turban tumor," this is a benign adnexal tumor. It presents as multiple smooth, domed nodules on the scalp but does not typically ulcerate or resemble a sebaceous cyst. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Almost exclusively found on the **scalp**. * **Clinical Feature:** It mimics malignancy due to its foul-smelling, fungating, and vascular appearance. * **Diagnosis:** Differentiated from SCC by the **absence of induration** at the base and confirmed via biopsy. * **Treatment:** Wide local excision is the treatment of choice.

Q: Which structure is usually repaired first in a hand injury?

Bone. In hand surgery, particularly in cases of complex trauma or replantation, the sequence of repair follows a specific surgical hierarchy to ensure stability and optimal outcomes. **Why Bone is Repaired First** The fundamental principle of hand reconstruction is **"Stability before Mobility."** The skeleton provides the structural framework for the hand. Rigid internal fixation of the bone (using K-wires, plates, or screws) is performed first because: 1. It provides a stable scaffold for the repair of soft tissue structures. 2. It prevents subsequent tension or disruption of delicate microvascular and nerve repairs that would occur if the bone were manipulated later. 3. It allows for accurate restoration of the limb's length. **Explanation of Incorrect Options** * **Tendon:** Tendons are repaired after bone fixation but usually before nerves and vessels. Repairing them too early without skeletal stability leads to gap formation or rupture during bone manipulation. * **Nerve:** Nerves are fragile and require a tension-free environment. They are repaired toward the end of the procedure to prevent accidental stretching during the orthopedic or vascular stages. * **Artery:** While restoring circulation is critical, vascular repair is typically performed after bone and tendon stabilization. If the artery is repaired before the bone, the subsequent manipulation required for fracture fixation can easily tear the delicate anastomosis. **NEET-PG High-Yield Pearls** * **Standard Sequence of Replantation:** Bone → Tendon → Artery → Nerve → Vein → Skin (Mnemonic: **B-T-A-N-V-S**). * **Exception:** If the warm ischemia time is nearing its limit, a temporary **vascular shunt** may be placed to restore perfusion before proceeding with bone fixation. * **Golden Rule:** Always stabilize the "chassis" (bone) before fixing the "cables" (tendons/nerves) and "pipes" (vessels).

Q: All of the following statements about skin grafting are true, except:

Full thickness grafts are typically used for large areas.. ### Explanation **1. Why Option C is the correct answer (The False Statement):** Full-thickness skin grafts (FTSG) consist of the entire epidermis and the complete dermis. Because the donor site of an FTSG cannot regenerate on its own (as no dermal elements remain), it must be closed primarily with sutures or covered with a split-thickness graft. This anatomical limitation makes FTSGs **unsuitable for large areas**. In contrast, Split-Thickness Skin Grafts (STSG) leave behind adnexal structures (hair follicles, sweat glands) in the donor site, allowing for spontaneous re-epithelialization and the coverage of extensive wounds. **2. Analysis of other options:** * **Option A:** True. A partial (split) thickness graft includes the epidermis and a variable portion of the superficial dermis. * **Option B:** True. By definition, an FTSG includes the epidermis and the entire dermis. Subcutaneous fat must be meticulously trimmed off to ensure graft "take," as fat acts as a barrier to revascularization. * **Option D:** True. FTSGs undergo less secondary contraction, maintain better color match, and preserve texture compared to STSGs, making them cosmetically superior for areas like the face and eyelids. **3. High-Yield Clinical Pearls for NEET-PG:** * **Stages of Graft Take:** 1. **Plasmatic Imbibition** (first 24–48 hours; nutrients via diffusion). 2. **Inosculation** (alignment of capillaries). 3. **Revascularization/Neovascularization** (day 4–7). * **Primary vs. Secondary Contraction:** * **Primary:** Immediate recoil after harvesting (Greater in **FTSG** due to more elastin). * **Secondary:** Shrinkage during healing (Greater in **STSG**). * **Most common cause of graft failure:** Hematoma (prevents contact between graft and bed). * **Ideal donor site for FTSG (Face):** Post-auricular or Supraclavicular area (best color match).

Q: Unilateral clefts are most common on which side?

Left side. **Explanation:** **1. Why the Left Side is Correct:** The occurrence of unilateral cleft lip and palate follows a distinct epidemiological pattern. Statistically, unilateral clefts are significantly more common on the **left side** (ratio of approximately 2:1 compared to the right side). While the exact embryological reason for this lateralization remains a subject of research, it is a well-documented clinical observation in craniofacial surgery. The cleft occurs due to the failure of fusion between the **maxillary process** and the **medial nasal process** during the 6th to 7th week of intrauterine life. **2. Analysis of Incorrect Options:** * **Right side:** While unilateral clefts can occur on the right, they are statistically less frequent than left-sided presentations. * **Median:** Median clefts are extremely rare and are typically associated with holoprosencephaly or other severe midline craniofacial defects. They result from the failure of the two medial nasal processes to merge. * **None of the above:** This is incorrect as the left-sided predominance is a recognized medical fact. **3. Clinical Pearls for NEET-PG:** * **Incidence:** Cleft lip (with or without palate) is more common in **males**, whereas isolated cleft palate is more common in **females**. * **Side Distribution:** Unilateral clefts are more common than bilateral clefts. Among unilateral cases, the **Left side** is the most frequent site. * **Rule of 10s (Millard’s Criteria for Surgery):** To undergo cleft lip repair, the infant should ideally be: 10 weeks old, 10 pounds in weight, and have a hemoglobin of 10 g/dL. * **Surgical Timing:** Cleft lip repair (Cheiloplasty) is usually done at **3–6 months**, while Cleft palate repair (Palatoplasty) is done at **6–12 months** (before the child develops speech).

Q: If pre-surgical movement of maxillary segments is indicated in a cleft infant, at what age is it typically initiated?

3 to 6 weeks of age. **Explanation:** The correct answer is **A. 3 to 6 weeks of age.** **Medical Concept:** Pre-surgical movement of maxillary segments, commonly known as **Presurgical Nasoalveolar Molding (PNAM)** or orthopedic appliance therapy, is designed to realign the displaced alveolar segments and improve nasal symmetry before the primary surgical repair. This process utilizes the high degree of **maternal estrogen-induced plasticity** present in the infant's cartilage and bone shortly after birth. Initiating treatment between 3 to 6 weeks allows the surgeon to take advantage of this flexibility to narrow the cleft gap, making the definitive cheiloplasty (lip repair) easier and reducing tension on the suture line. **Analysis of Incorrect Options:** * **B (10 to 12 weeks):** This is typically the age for the **Rule of 10s** (10 weeks, 10 lbs, 10g Hb) used for primary lip repair. By this time, the maxillary segments are more rigid, making significant molding less effective. * **C & D (3 to 12 months):** These timeframes are too late for orthopedic molding. Palatoplasty (cleft palate repair) is generally performed between 6 to 12 months, but the molding must be completed *before* the initial lip surgery. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 10s (Millard’s Rule):** Criteria for Cleft Lip repair: 10 weeks old, 10 lbs weight, 10 g/dL Hemoglobin. * **Sequence of Surgery:** Cleft Lip repair (3 months) → Cleft Palate repair (6–12 months) → Alveolar bone grafting (9–11 years, during mixed dentition). * **Goal of PNAM:** To reduce the severity of the initial cleft deformity, improve the nasal tip projection, and minimize the need for secondary revisions.

Q: Cleft lip repair is usually performed at what age?

3-6 months of age. **Explanation:** The timing of cleft lip repair is guided by the **"Rule of 10s,"** which ensures the infant is physiologically stable enough to undergo general anesthesia and surgery. According to this rule, the infant should be at least **10 weeks old**, weigh **10 pounds**, and have a hemoglobin level of **10 g/dL**. While the rule suggests 10 weeks (approx. 2.5 months), the standard clinical practice for elective repair is between **3 to 6 months of age**. This window allows for adequate facial growth and tissue development, facilitating a more precise anatomical reconstruction of the orbicularis oris muscle. **Analysis of Options:** * **Option A (3-6 months):** Correct. This aligns with the Rule of 10s and allows for optimal aesthetic and functional outcomes before the child develops complex social awareness. * **Option B & C (6-12 months):** These timeframes are typically reserved for **Cleft Palate repair** (usually performed between 6–12 months). Performing a lip repair this late may delay the molding effect the repaired lip has on the underlying alveolar segments. * **Option D (After one year):** Delaying repair beyond one year is unnecessary and can lead to significant psychological distress for the parents and potential feeding or speech development issues. **Clinical Pearls for NEET-PG:** * **Millard’s Rotation-Advancement Flap:** The most common surgical technique used for unilateral cleft lip repair. * **Tennison-Randall Technique:** A triangular flap technique used for cleft lip. * **Sequence of Management:** Lip repair (3-6 months) → Palate repair (6-12 months) → Bone grafting (9-11 years) → Rhinoplasty (after puberty/16+ years). * **Primary Goal:** The primary goal of lip repair is to restore the continuity of the **orbicularis oris muscle**.

Q: In case of an amputated finger requiring transplantation, what is the appropriate storage method?

Plastic bag with wet ice. ### Explanation The primary goal in preserving an amputated part is to maintain **viability** by reducing the metabolic rate of the tissue while preventing direct cellular damage. **Why Option A is Correct:** The gold standard for transporting an amputated digit is the **"Double Bag Technique"** using **wet ice**. 1. **Preparation:** The amputated part is wrapped in saline-soaked sterile gauze. 2. **Primary Bag:** It is placed in a dry, sealed plastic bag. 3. **Secondary Container:** This bag is then placed in a container filled with a mixture of **ice and water (wet ice)**. This method maintains a temperature of approximately **4°C**, which significantly extends the "cold ischemia time" (up to 24 hours for digits) without causing tissue freezing. **Why the Other Options are Incorrect:** * **B. Dry Ice:** Dry ice has a temperature of -78.5°C. Direct or indirect contact causes **frostbite and irreversible cryoinjury**, making the part non-viable for replantation. * **C & D. Cold Saline/Water:** Placing the amputated part directly into liquid (immersion) leads to **tissue maceration** and cellular edema, which complicates the microsurgical repair of vessels and nerves. **High-Yield Clinical Pearls for NEET-PG:** * **Ischemia Times:** Digits can tolerate **8 hours of warm ischemia** and **24 hours of cold ischemia**. Proximal parts (with muscle) only tolerate 6 hours of warm and 12 hours of cold ischemia. * **Never Freeze:** The part should never be in direct contact with ice. * **Do Not Use Antiseptics:** Avoid immersing the part in Formalin, Alcohol, or Povidone-iodine. * **Sequence of Repair in Replantation:** Bone fixation → Extensor tendon → Flexor tendon → Arterial repair → Nerve repair → Venous repair → Skin cover (**Mnemonic: BE FAN V**).

Question 1

A bilobed graft is typically used in which of the following anatomical locations?

Accepted Answer

Nose

Answer

Eyelid

Answer

Cheek

Answer

Fingertips

Question 2

Split skin graft take-up is good if:

Accepted Answer

Light compression wraps are applied as dressing.

Answer

The wound bed is avascular.

Answer

There is increased purulent discharge from the wound.

Answer

The wound area is insensitive.

Question 3

What is Cock's peculiar tumor?

Accepted Answer

Ulcerated sebaceous cyst

Answer

Basal cell carcinoma

Answer

Squamous cell carcinoma

Answer

Cylindroma

Question 4

Which structure is usually repaired first in a hand injury?

Accepted Answer

Bone

Answer

Tendon

Answer

Nerve

Answer

Artery

Question 5

In replantation surgery, which of the following types of injuries has the worst outlook regarding survival and return of function?

Accepted Answer

Crush injuries with avulsed vessels

Answer

Clean sharp guillotine amputations

Answer

Minimal local crush amputations

Answer

Avulsion amputation with minimal proximal distal vascular injury

Question 6

All of the following statements about skin grafting are true, except:

Accepted Answer

Full thickness grafts are typically used for large areas.

Answer

A partial thickness graft involves the epidermis and part of the dermis.

Answer

A full thickness graft includes the epidermis and dermis, without subcutaneous tissue.

Answer

Full thickness grafts offer significant cosmetic value.

Question 7

Unilateral clefts are most common on which side?

Accepted Answer

Left side

Answer

Right side

Answer

Median

Answer

None of the above

Question 8

If pre-surgical movement of maxillary segments is indicated in a cleft infant, at what age is it typically initiated?

Accepted Answer

3 to 6 weeks of age

Answer

10 to 12 weeks of age

Answer

3 to 6 months of age

Answer

10 to 12 months of age

Question 9

Cleft lip repair is usually performed at what age?

Accepted Answer

3-6 months of age

Answer

6-9 months of age

Answer

9-12 months of age

Answer

After one year of age

Question 10

In case of an amputated finger requiring transplantation, what is the appropriate storage method?

Accepted Answer

Plastic bag with wet ice

Answer

Plastic bag with dry ice

Answer

Plastic bag with cold saline

Answer

Plastic bag with cold water

Plastic and Reconstructive Surgery — MCQs

Plastic and Reconstructive Surgery — MCQs

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