Craniofacial Surgery Principles — MCQs

10 questions

A 12-year-old child presents with intellectual disability, a large face, a prominent jaw, large ears, and macroorchidism. Which genetic condition is most likely diagnosed?

Which of the following is an indication for Functional Endoscopic Sinus Surgery (FESS)?

A nasal surgery was carried out with the incision shown in the image. What was the procedure likely carried out?

In periodontal surgical treatment, which of the following surgical procedures are typically carried out first:

In the context of mandible fracture fixation, what is the optimum length of screw for fixation of a plate?

Treacher Collins syndrome is classified as which type of dysostosis?

Le Forte II is fracture of?

Raccoon eye is a feature of:

Following radical surgery for the carcinoma of breast, reconstruction of the breast can be performed by using the following procedures except

Q10

A Young Male complained of intermittent pain, swelling and discharge at the base of spine. He also had episodes of fever and repeated abscesses that had burst spontaneously. By occupation, he is a jeep driver. Physical examination showed pilonidal sinus. Which flap-based procedure is used for pilonidal sinus surgery?

Craniofacial Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 1: A 12-year-old child presents with intellectual disability, a large face, a prominent jaw, large ears, and macroorchidism. Which genetic condition is most likely diagnosed?

A. McCune-Albright syndrome
B. Down syndrome
C. Klinefelter syndrome
D. Fragile X syndrome (Correct Answer)
E. Prader-Willi syndrome

Explanation: ***Fragile X syndrome*** - This syndrome is characterized by **intellectual disability**, a distinctive **large face, prominent jaw, large ears**, and **macroorchidism** (enlarged testes) in males. - It is caused by a **CGG trinucleotide repeat expansion** in the *FMR1* gene on the X chromosome, leading to reduced or absent fragile X mental retardation protein (FMRP). *McCune-Albright syndrome* - This syndrome is characterized by a triad of **fibrous dysplasia of bone**, **café-au-lait spots**, and **precocious puberty**, which are not described in the child's presentation. - It is caused by a **somatic mutation** in the *GNAS* gene, affecting various endocrine functions. *Down syndrome* - Down syndrome is associated with distinct facial features such as **upslanting palpebral fissures**, **epicanthal folds**, and a **flat nasal bridge**, along with intellectual disability, but not the specific features of a large face, prominent jaw, large ears, or macroorchidism. - It is primarily caused by **trisomy 21**, an extra copy of chromosome 21. *Klinefelter syndrome* - Klinefelter syndrome (47, XXY) typically presents in males with **tall stature**, **infertility**, and **hypogonadism** (small testes), rather than macroorchidism. - While intellectual disability can occur, the characteristic facial and testicular features described point away from Klinefelter syndrome. *Prader-Willi syndrome* - This syndrome presents with **intellectual disability**, **hypotonia**, **hyperphagia** leading to obesity, and **hypogonadism** (small testes and underdeveloped genitalia), not macroorchidism. - It is caused by deletion or loss of function of genes on the **paternal chromosome 15q11-q13** region.

Question 2: Which of the following is an indication for Functional Endoscopic Sinus Surgery (FESS)?

A. inverted papilloma
B. Optic nerve decompression
C. Orbital abscess
D. Nasal polyposis (Correct Answer)

Explanation: ***Nasal polyposis*** - **Nasal polyposis refractory to medical management** is one of the most common and primary indications for **FESS**, as it allows for direct removal of polyps and restoration of sinus drainage and ventilation. - **FESS** aims to improve ventilation and mucociliary clearance within the paranasal sinuses, addressing the underlying chronic rhinosinusitis that leads to polyp formation. *Inverted papilloma* - **Inverted papilloma** is a benign but locally aggressive **epithelial tumor** that does require surgical excision, and FESS techniques are used for its removal. - However, it often requires **extended endoscopic approaches** (such as medial maxillectomy or modified endoscopic medial maxillectomy) rather than standard FESS to ensure complete removal and prevent recurrence due to its invasive growth pattern. - In the context of this question, **nasal polyposis** is the more straightforward and common indication for standard FESS. *Orbital abscess* - An **orbital abscess** is a surgical emergency requiring prompt drainage. While endoscopic sinus surgery may be used as part of the surgical approach to drain the abscess and address contributing sinusitis, the primary goal is abscess drainage rather than the sinus disease itself. - The indication here is the orbital complication, not chronic sinus disease per se. *Optic nerve decompression* - **Endoscopic optic nerve decompression** can be performed using FESS techniques for conditions like traumatic optic neuropathy or compressive lesions. - However, this is a specialized, advanced procedure for specific optic nerve pathology, not a routine indication for FESS in the management of chronic rhinosinusitis and its direct complications.

Question 3: A nasal surgery was carried out with the incision shown in the image. What was the procedure likely carried out?

A. Submucosal resection (SMR)
B. FESS (Functional Endoscopic Sinus Surgery)
C. Open rhinoplasty (Correct Answer)
D. Caldwell-Luc's procedure

Explanation: ***Open rhinoplasty*** - The image displays a **transcolumellar incision** (typically inverted V or W-shaped), which is the hallmark approach for **open rhinoplasty**. - This incision allows for direct visualization of the underlying nasal cartilages and bones, enabling precise reshaping of the nose. *Submucosal resection (SMR)* - SMR is a procedure to correct a **deviated nasal septum** by removing cartilage or bone from beneath the mucoperichondrial flaps. - It involves an **intranasal incision**, usually along the septal mucosa, not an external transcolumellar incision. *FESS (Functional Endoscopic Sinus Surgery)* - FESS is a minimally invasive procedure used to treat **chronic sinusitis** and other sinus conditions. - It is performed entirely **endoscopically through the nostrils**, with no external incisions on the nasal columella. *Caldwell-Luc's procedure* - This procedure accesses the **maxillary sinus** through an incision in the upper gum beneath the lip. - It is used for drainage of the maxillary sinus or removal of foreign bodies/tumors, and does not involve an external nasal incision.

Question 4: In periodontal surgical treatment, which of the following surgical procedures are typically carried out first:

A. Gingivectomy
B. Flap surgery (Correct Answer)
C. Osseous recontouring
D. Mucogingival surgery

Explanation: ***Flap surgery*** - **Flap surgery**, also known as **open flap debridement**, is a foundational procedure in periodontal treatment to gain access to the **root surfaces** and **bone defects**. - It involves lifting the **gingival tissue** to thoroughly clean and debride the affected areas, and is often the initial surgical approach once **non-surgical therapies** have been exhausted. *Gingivectomy* - **Gingivectomy** is primarily used for the removal of **excess gingival tissue** (gingival enlargement) or for **cosmetic recontouring**. - It is typically performed when there is no **osseous defect** or when access to the bone is not required, making it less suitable as the initial general surgical step for deeper periodontal disease. *Osseous recontouring* - **Osseous recontouring** (osteoplasty/ostectomy) involves reshaping or removing **bone defects** and is usually performed *after* **flap elevation** to correct underlying bony architecture. - It is a more advanced step once the **gingiva has been reflected** and the bone can be directly visualized and accessed. *Mucogingival surgery* - **Mucogingival surgery** addresses issues like **gingival recession**, inadequate **attached gingiva**, or abnormal **frena**. - These procedures (e.g., **gum grafting**) are often performed *after* initial periodontal disease control or when specific mucogingival defects require correction, rather than as a primary approach for pocket reduction.

Question 5: In the context of mandible fracture fixation, what is the optimum length of screw for fixation of a plate?

A. 2mm
B. 3mm
C. 4mm
D. 6mm (Correct Answer)

Explanation: ***6mm*** - A 6mm screw length is generally considered **optimal** for mandible fracture fixation as it provides sufficient purchase into the cortical bone for stability without significantly increasing the risk of damaging vital structures. - This length allows for **bicortical engagement** in many regions of the mandible, maximizing stability. *2mm* - A 2mm screw is too short and would not provide adequate **cortical engagement** or stability for mandible fracture fixation. - Such a short screw is prone to **pull-out** and would likely result in an unstable construct. *3mm* - While longer than 2mm, a 3mm screw may still be too short to achieve consistent **bicortical fixation** in denser regions of the mandible. - This length might offer insufficient stability, especially in areas subjected to significant **occlusal forces**. *4mm* - A 4mm screw length is an improvement over shorter options but might still be borderline for achieving optimal **bicortical purchase** in all areas of mandible fixation. - For robust fixation, particularly in load-bearing areas, a slightly longer screw is generally preferred to prevent **micromotion** and aid healing.

Question 6: Treacher Collins syndrome is classified as which type of dysostosis?

A. Maxillofacial Dysostosis
B. Mandibulofacial Dysostosis (Correct Answer)
C. Maxillomandibacial Dysostosis
D. Condylar Dysostosis

Explanation: ***Mandibulofacial Dysostosis*** - Treacher Collins syndrome is specifically characterized by malformations of the **mandible** and **facial structures**, hence the classification as mandibulofacial dysostosis. - Key features include underdeveloped facial bones, particularly the zygoma, maxilla, and mandible, leading to a distinctive facial appearance. *Maxillofacial Dysostosis* - This term is less specific, implying involvement of both the **maxilla** and facial bones, but does not specifically highlight the primary mandibular involvement seen in Treacher Collins syndrome. - While the maxilla is affected, the prominent malformation of the mandible is a defining characteristic that distinguishes it from a generalized maxillofacial dysostosis. *Maxillomandibacial Dysostosis* - This term is not a standard or recognized classification for Treacher Collins syndrome in medical literature. - It attempts to combine aspects of maxilla and mandible involvement but lacks the precise etymological and clinical fit of "mandibulofacial dysostosis." *Condylar Dysostosis* - This term specifically refers to dysostosis affecting the **condyles**, which are parts of bones, particularly the mandibular condyle. - While the mandibular condyle can be affected in Treacher Collins syndrome, this term is too narrow to encompass the broader facial bone involvement characteristic of the disorder.

Question 7: Le Forte II is fracture of?

A. Fracture involving midline of the palate and zygomatico-maxillary suture
B. Fracture involving alveolar ridge
C. Fracture involving lateral side of hard palate
D. Fracture involving zygomatic process of the maxilla, floor of orbit, root of nose (Correct Answer)

Explanation: ***Fracture involving zygomatic process of the maxilla, floor of orbit, root of nose*** - A **Le Fort II fracture**, also known as a **pyramidal fracture**, involves the **nasal bones**, **frontal processes of the maxilla**, **lacrimal bones**, and the **zygomaticomaxillary suture**. - This fracture pattern creates a pyramid-shaped detached segment of the midface, including the **floor of the orbit** and the **zygomatic process of the maxilla**. *Fracture involving midline of the palate and zygomatico-maxillary suture* - This description is characteristic of a **Le Fort I fracture**, which involves the **maxilla separating from the pterygoid plates** and nasal septum, producing a floating palate. - A **Le Fort I fracture** typically involves the **midline of the palate** and may extend to the zygomaticomaxillary suture but often inferiorly. *Fracture involving alveolar ridge* - This describes a **dentoalveolar fracture**, which is a localized fracture of the **alveolar process** containing teeth, without involving the major midfacial structures. - These fractures are typically confined to the tooth-bearing part of the maxilla or mandible and are not classified as a Le Fort fracture. *Fracture involving lateral side of hard palate* - While a fracture extending to the lateral side of the hard palate can occur with various midfacial traumas, this specific description is not the defining characteristic of any of the Le Fort fracture classifications. - Le Fort fractures involve comprehensive patterns of maxillary and midfacial separation, rather than isolated fractures of the lateral hard palate.

Question 8: Raccoon eye is a feature of:

A. Le Fort 3
B. Le Fort 1
C. Both Le Fort 2 and Le Fort 3 (Correct Answer)
D. Le Fort 2

Explanation: ***Both Le Fort 2 and Le Fort 3*** - **Raccoon eyes** (bilateral periorbital ecchymosis) is a hallmark sign of **midface fractures** that involve the base of the skull and orbital regions. - **Le Fort II fractures** (pyramidal fractures) involve the nasal bones, medial orbital walls, and infraorbital rims, with the fracture line extending through the ethmoid and lacrimal bones, allowing blood to extravasate into the periorbital area. - **Le Fort III fractures** (craniofacial dysjunction) cause complete separation of the midface from the skull base, resulting in extensive trauma that commonly produces raccoon eyes. - **Both fracture types** can cause this sign, making this the most complete answer. *Le Fort 3* - While Le Fort III fractures certainly cause **raccoon eyes** due to craniofacial dysjunction and skull base involvement, this option is **incomplete**. - Selecting only Le Fort III misses the fact that **Le Fort II fractures also cause raccoon eyes**, making "both" the better answer. *Le Fort 1* - **Le Fort I fractures** are horizontal fractures of the maxilla involving the palate and lower maxillary walls ("floating palate"). - These fractures **do not extend superiorly** to involve the orbital region or skull base, so they typically **do not cause raccoon eyes**. *Le Fort 2* - While Le Fort II fractures do cause **raccoon eyes** through involvement of the medial orbital walls, ethmoid, and lacrimal bones, this option is **incomplete**. - Selecting only Le Fort II misses the fact that **Le Fort III fractures also cause raccoon eyes**, making "both" the better answer.

Question 9: Following radical surgery for the carcinoma of breast, reconstruction of the breast can be performed by using the following procedures except

A. Silicone implants
B. Transversus abdominis muscle flap (TRAM flap)
C. Latissimus dorsi flap (LD flap)
D. Deltopectoral flap (Correct Answer)

Explanation: ***Deltopectoral flap*** - The **deltopectoral flap**, also known as the Bakamjian flap, is primarily used for **head and neck reconstruction**, particularly for defects in the pharynx, esophagus, or oral cavity. - It involves tissue from the shoulder and chest wall, but its design and vascular supply make it unsuitable for **breast reconstruction** after radical mastectomy, which requires significantly more volume and different tissue characteristics. *Silicone implants* - **Silicone implants** are a common method for breast reconstruction, offering a less invasive option than flap procedures. - They are placed either beneath the pectoral muscle or subcutaneously to restore breast volume and shape. *Transversus abdominis muscle flap (TRAM flap)* - The **TRAM flap** is a widely used and versatile autologous tissue reconstruction method, utilizing tissue from the lower abdomen to create a new breast mound. - It can be either pedicled (retaining its original blood supply) or free (requiring microvascular anastomosis), providing a natural-feeling and long-lasting reconstruction. *Latissimus dorsi flap (LD flap)* - The **latissimus dorsi (LD) flap** involves transferring muscle, fat, and skin from the back to the chest to reconstruct the breast. - It is particularly useful for smaller breasts or when combined with an implant, and it can provide good aesthetic results with reliable blood supply.

Question 10: A Young Male complained of intermittent pain, swelling and discharge at the base of spine. He also had episodes of fever and repeated abscesses that had burst spontaneously. By occupation, he is a jeep driver. Physical examination showed pilonidal sinus. Which flap-based procedure is used for pilonidal sinus surgery?

A. Rhomboid flap (Correct Answer)
B. Free flap
C. Rotational flap
D. Circular flap

Explanation: ***Rhomboid flap*** - The **rhomboid flap** (**Limberg flap**) is a common and effective surgical technique for pilonidal sinus, offering good wound closure and reduced recurrence rates. - It involves excising the sinus tract *en bloc* and closing the defect with a **rhomboid-shaped skin flap**, which distributes tension evenly. - This is a **transposition flap** that moves tissue laterally into the defect while maintaining blood supply. *Free flap* - **Free flaps** involve transplanting tissue with its own blood supply from one part of the body to another using microsurgery. - This method is overly complex and unnecessary for a typical pilonidal sinus repair, which usually only requires local tissue rearrangement. *Rotational flap* - A **rotational flap** is a type of local flap where tissue is rotated on a pivot point to cover a defect. - While rotational flaps (such as the **Karydakis flap**) can be used for pilonidal sinus surgery, the **rhomboid flap** is more commonly referenced as the standard flap-based technique due to its reliable outcomes and specific geometric design. - The rhomboid flap is technically a **transposition flap**, not a rotational flap, though both are local tissue rearrangement techniques. *Circular flap* - **Circular flaps** are generally not a standard design for closing excisional defects, especially in areas like the sacrococcygeal region where linear tension and dead space management are crucial. - Such a flap would likely create dog-ears and poor cosmetic outcomes, making it unsuitable for pilonidal sinus surgery.

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