Plastic and Reconstructive Surgery Practice Questions

Q: Which of the following grafts is commonly used to replace defective mandibular condyles in children?

Costochondral graft. **Explanation:** The **Costochondral Graft (CCG)** is the gold standard for mandibular condyle reconstruction in pediatric patients, particularly in cases of congenital anomalies (like Hemifacial Microsomia) or post-traumatic ankylosis. **Why it is the correct choice:** The primary reason for selecting a costochondral graft in children is its **growth potential**. The cartilaginous cap of the rib acts as a "growth center," mimicking the physiological behavior of the natural condyle. This allows the reconstructed mandible to grow in symmetry with the rest of the facial skeleton as the child matures. Furthermore, it is biologically compatible, easy to harvest (usually from the 4th, 5th, or 6th rib), and provides both a rigid bony base for fixation and a smooth cartilaginous surface for joint articulation. **Analysis of Incorrect Options:** * **Sternoclavicular graft:** While it anatomically resembles the Temporomandibular Joint (TMJ) due to its fibrocartilage and disc, it is technically difficult to harvest and carries a risk of injury to the great vessels. * **Calvarial graft:** This is a membranous bone graft. While excellent for contouring defects or orbital floor repairs, it lacks a cartilaginous component and cannot facilitate longitudinal growth. * **Metatarsal graft:** Historically used for small joint reconstructions, it has been largely abandoned for the mandible due to donor site morbidity and inferior growth predictability compared to CCG. **High-Yield Clinical Pearls for NEET-PG:** * **Donor Site:** The 4th, 5th, or 6th rib is typically used. * **The "Growth" Factor:** The main complication of CCG in children is **overgrowth**, which may lead to secondary facial asymmetry. * **Adults vs. Children:** In adults, where growth is complete, reconstruction is more commonly done using vascularized bone flaps (e.g., Fibula flap) or prosthetic joints.

Q: Abbey's flap is used for reconstruction of which anatomical structure?

Upper lip. **Explanation:** The **Abbe flap** (also known as a cross-lip flap or lip-switch flap) is a classic reconstructive technique used primarily for **upper lip defects** that involve more than one-third but less than two-thirds of the lip length. **Why Upper Lip is Correct:** The procedure involves harvesting a full-thickness wedge-shaped pedicled flap from the **lower lip** (usually the central portion) and rotating it 180 degrees into a central defect of the **upper lip**. The flap remains attached by a narrow vascular pedicle containing the **labial artery** for 2–3 weeks to ensure blood supply before the pedicle is divided in a second stage. It is most commonly used to correct post-traumatic defects or congenital deformities like a "tight" upper lip following a bilateral cleft lip repair. **Analysis of Incorrect Options:** * **Lower Lip:** While the flap is *taken* from the lower lip, it is used to *reconstruct* the upper lip. (Note: The Estlander flap is a similar lip-switch technique used specifically for defects involving the oral commissure). * **Breast:** Breast reconstruction typically utilizes flaps like the TRAM (Transverse Rectus Abdominis Myocutaneous), DIEP, or Latissimus Dorsi flaps. * **Cheek:** Cheek defects are usually managed with local advancement flaps (like the Mustarde flap) or free flaps, depending on the size. **High-Yield Clinical Pearls for NEET-PG:** * **Vascular Basis:** The flap is based on the **inferior labial artery**. * **Staged Procedure:** It is a **two-stage** procedure (division occurs at 14–21 days). * **Estlander Flap vs. Abbe Flap:** The Estlander flap involves the **commissure** (corner of the mouth), whereas the Abbe flap does not. * **Gillies Fan Flap:** Another high-yield lip reconstruction term; it is used for large lower lip defects by rotating tissue from the cheek/nasolabial area.

Q: Keloid formation is least likely seen over which of the following areas?

Eyelid. **Explanation:** Keloids are benign overgrowths of dense fibrous tissue (collagen) that extend beyond the boundaries of the original wound. Their formation is highly dependent on **skin tension** and the density of skin appendages. **Why Eyelid is the correct answer:** The **eyelid** (along with the scrotum and palms/soles) is characterized by very thin skin with minimal tension and a lack of pilosebaceous units. These anatomical factors make it highly resistant to keloid formation. In clinical practice, keloids are almost never seen on the eyelids, making it the "least likely" site among the options. **Analysis of Incorrect Options:** * **Presternal region:** This is the **most common** site for keloids due to high constant skin tension from the pectoralis muscles and chest wall movement. * **Deltoid/Shoulder:** A very common site, often triggered by vaccinations (like BCG) or trauma, due to high tension during arm movement. * **Ear:** A frequent site for keloids, typically occurring on the lobule following ear piercing. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Keloids extend **beyond** the margin of the original wound and do not regress spontaneously (unlike hypertrophic scars). * **Common Sites (High to Low):** Presternal > Shoulder/Deltoid > Upper back > Ear lobule. * **Rare Sites:** Eyelids, Scrotum, Palms, and Soles. * **Histology:** Characterized by thick, disorganized, "glassy" **Type I and Type III collagen** bundles. * **Treatment:** Intralesional Triamcinolone (steroids) is the first-line medical treatment. Excision alone has a high recurrence rate (>50%).

Q: What is the most common congenital anomaly of the face?

Cleft lip and cleft palate. **Explanation:** Congenital orofacial clefts are among the most common birth defects worldwide. The correct answer is **Cleft lip and cleft palate (CLP)** because, statistically, the combined occurrence of both anomalies is more frequent than either occurring in isolation. 1. **Why Cleft Lip and Cleft Palate (CLP) is correct:** Approximately **45-50%** of all orofacial cleft cases present as a combination of cleft lip and cleft palate. This occurs due to a failure of the primary palate (intermaxillary segment) and secondary palate (palatal shelves) to fuse during the 4th to 12th weeks of gestation. It is more common in males and is more frequently seen on the left side. 2. **Why other options are incorrect:** * **Isolated Cleft Palate (CP):** Accounts for about **30%** of cases. Unlike CLP, it is more common in females and is often associated with syndromes (e.g., Pierre Robin Sequence). * **Cleft Lip alone (CL):** Accounts for approximately **20-25%** of cases. While common, its incidence is lower than the combined deformity. * **Equal incidence:** This is incorrect as epidemiological studies consistently show a hierarchy in frequency (CLP > CP > CL). **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 10s (Millard’s criteria for CL repair):** 10 weeks of age, 10 lbs weight, and 10 g/dL Hemoglobin. * **Timing of Surgery:** Cleft Lip repair (Cheiloplasty) is usually done at **3–6 months**, while Cleft Palate repair (Palatoplasty) is done at **9–18 months** (to allow for speech development but before speech patterns are fixed). * **Most common side:** Left-sided unilateral clefts are the most common presentation. * **Etiology:** Multifactorial (genetic + environmental factors like maternal smoking or anticonvulsant use).

Q: Pollicization is best described as?

Reconstruction of the thumb. **Explanation:** **Pollicization** is a specialized reconstructive surgical procedure where a functional finger (most commonly the **index finger**) is surgically repositioned to the thumb position to replace a missing or severely hypoplastic thumb. The goal is to restore the essential functions of the thumb, specifically **opposition and pinch grip**, which are vital for hand utility. **Why Option D is Correct:** The term is derived from the Latin *pollex* (thumb). It involves neurovascular transposition of a digit, maintaining its blood supply and nerve sensation, while shortening the bone and reorienting the muscles to mimic thumb biomechanics. It is the gold standard for treating **Thumb Hypoplasia (Muller types IIIB, IV, and V)**. **Analysis of Incorrect Options:** * **Option A (Amputation):** This refers to the removal of the thumb, which is the opposite of reconstruction. * **Option B (Equalization):** This is not a standard surgical term for thumb reconstruction. While the procedure involves adjusting lengths, "equalization" does not describe the transposition process. * **Option C (Toe to thumb transplantation):** While this is a method of thumb reconstruction, it is specifically called a **"Toe-to-Hand Transfer"** (usually using the great toe or second toe). Pollicization specifically refers to using an existing finger from the same hand. **High-Yield Clinical Pearls for NEET-PG:** * **Indications:** Congenital thumb aplasia/hypoplasia, traumatic loss of the thumb at the carpometacarpal level. * **Most common donor:** The **index finger** is the preferred donor digit due to its proximity and independent mobility. * **Buck-Gramcko Technique:** The most widely used surgical technique for pollicization. * **Key Step:** The index metacarpal is shortened and the metacarpophalangeal (MCP) joint of the index finger becomes the new **carpometacarpal (CMC) joint** of the reconstructed thumb.

Q: Which treatment is considered the most successful for cleft palate?

Langenbeck's operation. **Explanation:** The primary goal of cleft palate surgery (Palatoplasty) is to create a functional partition between the oral and nasal cavities and to facilitate normal speech development. **Langenbeck’s Operation (Bipedicled Flap)** is considered a classic and highly successful technique for repairing cleft palate. It involves making relaxing incisions along the lateral borders of the palate (near the alveolar ridge) to create two bipedicled mucoperiosteal flaps. These flaps are then mobilized medially and sutured in the midline. This technique is particularly effective for closing the hard palate defect without excessive tension, which is crucial for successful healing and preventing dehiscence. **Analysis of Incorrect Options:** * **Mirault-Blair Operation:** This is an archaic technique used for **Cleft Lip** repair, not cleft palate. It has largely been replaced by modern procedures. * **Millard’s Rotation-Advancement Flap:** This is the "gold standard" and most commonly used procedure for **Unilateral Cleft Lip** repair. It is a lip-shaping procedure and does not address the palatal defect. **Clinical Pearls for NEET-PG:** * **Timing of Surgery:** Cleft Lip is typically repaired at **3–6 months** (Rule of 10s), while Cleft Palate is ideally repaired between **6–12 months** to allow for speech development before compensatory habits form. * **Veau-Wardill-Kilner Operation:** Another common palatoplasty technique (V-Y pushback) used to increase the length of the soft palate. * **Complication:** The most common complication of palatoplasty is the formation of a **palatal fistula**. * **Muscle of concern:** In cleft palate, the *Levator veli palatini* is abnormally attached to the posterior border of the hard palate; surgical correction aims to reorient this muscle transversely.

Question 1

Revascularization of a skin graft typically occurs after approximately how many days?

Accepted Answer

5 days

Answer

2 days

Answer

3 days

Answer

4 days

Question 2

Which of the following grafts is commonly used to replace defective mandibular condyles in children?

Accepted Answer

Costochondral graft

Answer

Sternoclavicular graft

Answer

Calvarial graft

Answer

Metatarsal graft

Question 3

Abbey's flap is used for reconstruction of which anatomical structure?

Accepted Answer

Upper lip

Answer

Breast

Answer

Cheek

Answer

Lower lip

Question 4

Keloid formation is least likely seen over which of the following areas?

Accepted Answer

Eyelid

Answer

Ear

Answer

Deltoid

Answer

Presternal region

Question 5

Which statement regarding osteotomies is correct?

Accepted Answer

Osteotomies of the Le Fort III type are most commonly indicated in syndromes associated with the early closure of cranial sutures.

Answer

Osteotomies of the Le Fort III type, like the Le Fort III fracture, are not associated with great blood loss and therefore the patient rarely needs more than 2 pints of blood transfused.

Answer

Osteotomies of the Le Fort III type, if done with the use of a bicoronal flap, are not followed by nerve paresthesias postoperatively.

Answer

Osteotomies of the Le Fort II type produce maxillary necrosis in the cleft palate patient.

Question 6

What is the surgical procedure of choice for skeletal class 2 malocclusion due to a retrognathic mandible?

Accepted Answer

Bilateral Sagittal Split Osteotomy (BSSO) advancement of the mandible

Answer

Le Fort I osteotomy

Answer

Advancement genioplasty

Answer

Bilateral Sagittal Split Osteotomy (BSSO) setback of the mandible

Question 7

What is the most common congenital anomaly of the face?

Accepted Answer

Cleft lip and cleft palate

Answer

Cleft lip alone

Answer

Isolated cleft palate

Answer

All have equal incidence

Question 8

Which of the following incision is preferred to excise a lesion on the bridge of the nose?

Accepted Answer

Horizontal

Answer

Circular

Answer

Elliptical

Answer

Vertical

Question 9

Pollicization is best described as?

Accepted Answer

Reconstruction of the thumb

Answer

Amputation of the thumb

Answer

Equalization of fingers

Answer

Toe to thumb transplantation

Question 10

Which treatment is considered the most successful for cleft palate?

Accepted Answer

Langenbeck's operation

Answer

Mirault Blair operation

Answer

Miller's rotation advancement

Answer

None of the above

Plastic and Reconstructive Surgery — MCQs

Plastic and Reconstructive Surgery — MCQs

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