Reconstructive Techniques in Head and Neck Surgery — MCQs
Wound contraction can be most effectively minimized by:
Extensive surgical debridement, decompression or amputation may be indicated in the following clinical setting except
When osseous defects amenable to reconstruction are present, technique of choice is?
Best procedure for an injury to the leg with exposed bone and skin loss:
In periodontal surgical treatment, which of the following surgical procedures are typically carried out first:
During reconstruction of an amputated limb which of the following is done first?
Deep skin burns are treated with:
Which flap is commonly used in breast reconstruction?
Treatment of resectable T4N0M0 stage of head and neck carcinoma is?
Second primary tumor of head and neck is most commonly seen in malignancy of:
Reconstructive Techniques in Head and Neck Surgery Indian Medical PG Practice Questions and MCQs
Question 1: Wound contraction can be most effectively minimized by:
- A. Allowing secondary granulation
- B. Full thickness grafting (Correct Answer)
- C. Split skin graft
- D. Dressing with placenta
Explanation: ***Full thickness grafting*** - **Full-thickness skin grafts** include the epidermis and full dermis, which contains **fewer myofibroblasts** than split-thickness grafts, thus minimizing contraction. - The greater amount of dermal tissue acts as a **mechanical barrier** to prevent excessive wound contraction, providing a more stable and aesthetically pleasing result. *Allowing secondary granulation* - Healing by **secondary intention** involves substantial granulation tissue formation, which is rich in **myofibroblasts** and leads to significant wound contraction. - This method of healing is often used for infected or contaminated wounds but results in the **most contraction**. *Split skin graft* - **Split-thickness skin grafts** contain only a portion of the dermis, making them prone to **moderate to significant wound contraction**. - While better than secondary intention, the thin dermal layer provides less resistance to the contractile forces of the **myofibroblasts**. *Dressing with placenta* - **Placental tissue dressings** can promote wound healing by providing growth factors and a scaffold for regeneration. - However, they do not inherently prevent or minimize **wound contraction** in the same way that a full-thickness graft mechanically does, as they do not replace the entire dermal layer.
Question 2: Extensive surgical debridement, decompression or amputation may be indicated in the following clinical setting except
- A. Acute rhabdomyolysis
- B. Acute haemolytic streptococcal cellulitis
- C. Acute thrombophlebitis (Correct Answer)
- D. Progressive synergistic gangrene
Explanation: ***Acute thrombophlebitis*** - This condition involves inflammation and **thrombosis** of a superficial vein, typically managed with **anticoagulation**, pain relief, and local measures. - Surgical intervention like debridement, decompression, or amputation is generally **not indicated** unless there are severe complications such as infection or extensive tissue necrosis, which are rare. *Acute rhabdomyolysis* - Severe rhabdomyolysis can lead to **compartment syndrome**, necessitating fasciotomy (decompression) to prevent irreversible muscle and nerve damage. - In cases of extensive muscle necrosis, **surgical debridement** may be required to remove non-viable tissue and prevent further systemic complications. *Acute haemolytic streptococcal cellulitis* - While initial management is antibiotics, rapidly progressing necrotizing infections (like **necrotizing fasciitis**, a severe form often caused by *Streptococcus pyogenes*) require **extensive surgical debridement** to remove dead tissue and control the spread of infection. - Delayed debridement can lead to systemic toxicity, limb loss, or death, making aggressive surgical intervention crucial. *Progressive synergistic gangrene* - Also known as **Meleney's gangrene**, this rare but severe soft tissue infection requires aggressive and **extensive surgical debridement** of all necrotic tissue. - The combination of aerobic and anaerobic bacteria creates a progressive, destructive lesion that can necessitate amputation if not adequately controlled by debridement.
Question 3: When osseous defects amenable to reconstruction are present, technique of choice is?
- A. Sulcular flap
- B. Modified Widman flap
- C. Apically displaced flap
- D. Papilla preservation flap (Correct Answer)
Explanation: ***Papilla preservation flap*** - This technique is specifically designed to **preserve the interdental papilla**, which is critical for covering and protecting regenerative materials placed in osseous defects. - By maintaining the integrity of the papilla, it facilitates primary wound closure over the defect, enhancing the predictability of **guided tissue regeneration (GTR)** and bone grafting procedures. *Sulcular flap* - A sulcular flap involves an incision within the sulcus, which typically provides limited access and does not allow for adequate coverage of large **osseous defects**. - It does not offer the tissue volume needed for the stable primary closure essential for regenerative procedures. *Modified Widman flap* - While providing excellent access for debridement in periodontal pockets, the modified Widman flap's incisions often **transect the interdental papilla**, making primary closure over a regenerative defect less ideal. - Its primary goal is root debridement and pocket reduction, not necessarily **papilla preservation** for regenerative purposes. *Apically displaced flap* - An apically displaced flap is designed to **increase the zone of attached gingiva** or reduce pocket depths, by positioning the flap apically to its original position. - This flap design is not suitable for covering osseous defects amenable to reconstruction because it often exposes more root surface and does not provide the necessary coronal coverage for regenerative materials.
Question 4: Best procedure for an injury to the leg with exposed bone and skin loss:
- A. Full thickness grafting
- B. Skin flap
- C. Split skin grafting
- D. Pedicle flap (Correct Answer)
Explanation: ***Pedicle flap*** - A pedicle flap provides **vascularized tissue** that can cover exposed bone, which requires a robust blood supply for healing and protection. - This method ensures good **tissue viability** and bulk, crucial for areas with high functional demands and potential for infection like the lower leg. *Full thickness grafting* - **Full-thickness skin grafts** are generally too thin to adequately cover exposed bone and do not provide sufficient vascularity or padding. - They rely entirely on the recipient bed for vascularization, which is poor over exposed bone, leading to a high risk of **graft failure**. *Skin flap* - While a generic "skin flap" implies a vascularized tissue transfer, it is less specific than a pedicle flap, which ensures continuous blood supply from the donor site until full integration. - The term "skin flap" alone doesn't specify if it's a local, regional, or free flap, and **pedicle flaps** are often the most direct and reliable solution for lower leg bone exposure. *Split skin grafting* - **Split-thickness skin grafts** are very thin and contain only a portion of the dermis, making them unsuitable for covering exposed bone or tendons. - They would likely **fail to take** due to lack of a vascular bed and offer no padding or protection against further injury.
Question 5: 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 6: During reconstruction of an amputated limb which of the following is done first?
- A. Arterial repair
- B. Venous repair
- C. Fixation of the bone (Correct Answer)
- D. Nerve anastomoses
Explanation: ***Fixation of the bone*** - **Bone stabilization** is the crucial first step to create a rigid framework, allowing for subsequent precise vascular and nerve repairs. - This prevents movement and tension on delicate repairs, which could lead to failure of the reconnected vessels and nerves. *Arterial repair* - While critical for blood supply, arterial repair is performed *after* bone fixation to ensure the vessels are not disrupted by later bone manipulation. - It's typically done before venous repair to establish arterial flow and identify any potential venous back pressure that needs addressing. *Venous repair* - Venous repair is usually performed after arterial repair, as establishing arterial inflow can help distend the veins, making them easier to identify and repair. - Repairing veins first without establishing arterial flow immediately is less effective and may lead to congestion once arterial flow is restored. *Nerve anastomoses* - Nerve repair is typically the last major step in an amputation reconstruction, following bone stabilization and full vascular repair. - Nerves are fragile and require a stable, well-perfused environment to optimize the chances of successful regeneration.
Question 7: Deep skin burns are treated with:
- A. Amniotic membrane
- B. Split thickness graft (Correct Answer)
- C. Full thickness graft
- D. Synthetic skin derivatives
Explanation: ***Split thickness graft*** - A **split-thickness skin graft (STSG)** involves transferring the epidermis and a portion of the dermis from a donor site to the burned area. - This type of graft is commonly used for deep partial-thickness or full-thickness burns because it provides good coverage with minimal donor site morbidity and has a high take rate. *Amniotic membrane* - **Amniotic membrane** is primarily used as a biological dressing for superficial burns or chronic wounds, promoting healing and reducing pain. - It does not provide permanent skin coverage for deep burns, which require viable skin for closure. *Full thickness graft* - A **full-thickness skin graft (FTSG)** includes the entire epidermis and dermis, resulting in better cosmetic and functional outcomes. - However, FTSGs are typically used for smaller, deeper defects or areas requiring maximum durability, rather than extensive deep burns, and their take rate is lower compared to STSGs. *Synthetic skin derivatives* - **Synthetic skin derivatives** (e.g., Integra, Biobrane) can be used as temporary dressings or matrices to facilitate wound healing in deep burns, but they typically require subsequent grafting. - They do not provide permanent, living tissue for definitive closure of large, deep burn wounds.
Question 8: Which flap is commonly used in breast reconstruction?
- A. DIEP based on deep inferior epigastric perforator vessels (Correct Answer)
- B. Gluteal flap based on superior gluteal artery
- C. Latissimus dorsi flap based on thoracodorsal artery
- D. TRAM based on transverse rectus abdominis muscle
Explanation: ***DIEP based on deep inferior epigastric perforator vessels*** - The **DIEP flap** is currently the **most preferred autologous flap** for breast reconstruction and is increasingly commonly used in modern practice. - It uses tissue from the lower abdomen, providing excellent volume and a natural-feeling breast mound, while being nourished by **deep inferior epigastric perforator vessels**. - Key advantage: **Muscle-sparing technique** that preserves the rectus abdominis muscle, minimizing abdominal wall morbidity compared to older techniques like TRAM. - Considered the **gold standard** for abdominal-based breast reconstruction. *Gluteal flap based on superior gluteal artery* - While gluteal flaps (like the **SGAP** based on the **superior gluteal artery**) are used for breast reconstruction, they are typically considered a secondary option when abdominal tissue is unavailable or unsuitable. - Harvesting can be more challenging and may result in a less ideal breast shape compared to abdominal flaps. - Less commonly used compared to abdominal-based flaps. *Latissimus dorsi flap based on thoracodorsal artery* - The **latissimus dorsi flap** is a reliable and commonly used option, particularly for smaller breasts or partial reconstruction. - However, it often requires an implant to achieve sufficient volume (not purely autologous reconstruction). - It involves transferring muscle from the back, which can lead to back weakness or contour deformities. - While frequently used, it is not the preferred choice when autologous tissue from the abdomen is available. *TRAM based on transverse rectus abdominis muscle* - The **TRAM flap** was historically a very common choice for breast reconstruction but involves taking a significant portion of the rectus abdominis muscle. - This leads to higher rates of abdominal wall weakness, hernias, or bulges compared to muscle-sparing techniques. - It is currently **less commonly used** than the DIEP flap due to its higher donor site morbidity and has been largely superseded by the DIEP technique.
Question 9: Treatment of resectable T4N0M0 stage of head and neck carcinoma is?
- A. Radiotherapy alone
- B. Surgery and Radiotherapy (Correct Answer)
- C. Chemoradiation
- D. Surgery alone
Explanation: ***Surgery and Radiotherapy*** - For **resectable T4N0M0 head and neck carcinoma**, the standard treatment is **surgical resection** of the primary tumor followed by **adjuvant radiotherapy**. - This approach achieves optimal **local control** for advanced primary tumors without nodal involvement. - **Adjuvant radiotherapy** is essential for T4 tumors due to high risk of microscopic residual disease and local recurrence. - Surgery allows for complete tumor removal with negative margins, while radiotherapy addresses subclinical disease. *Radiotherapy alone* - Radiotherapy alone is **insufficient as monotherapy** for T4 tumors due to the large tumor burden and extensive local invasion. - Single modality radiation cannot reliably achieve adequate tumor control for advanced primary lesions. - Generally reserved for early-stage disease or patients unfit for surgery. *Chemoradiation* - **Definitive chemoradiation** is an alternative for **unresectable T4 tumors** or when organ preservation is desired (e.g., laryngeal cancer). - For **resectable** T4N0M0 disease, surgery with adjuvant RT is preferred as it provides better local control and allows pathological staging. - Chemoradiation may be used postoperatively if high-risk features are found (positive margins, perineural invasion, extranodal extension). - In this **N0 case with resectable tumor**, upfront surgery is the preferred initial approach. *Surgery alone* - While surgical resection is crucial for T4 tumors, **surgery alone is inadequate** due to high risk of locoregional recurrence. - T4 classification indicates extensive local invasion, necessitating **adjuvant radiotherapy** to eradicate microscopic disease. - Combined modality treatment (surgery + RT) significantly improves local control and survival compared to surgery alone.
Question 10: Second primary tumor of head and neck is most commonly seen in malignancy of:
- A. Paranasal sinuses
- B. Hypopharynx
- C. Larynx
- D. Oral cavity (Correct Answer)
Explanation: ***Oral cavity*** - Patients with **oral cavity squamous cell carcinoma** (OCSCC) have the highest incidence of developing **second primary tumors** (SPTs) in the head and neck region, often due to shared risk factors like tobacco and alcohol use. - The concept of "**field cancerization**" explains this phenomenon, where prolonged exposure to carcinogens leads to widespread genetic alterations in the mucosal lining, predisposing multiple sites to develop independent primary cancers. *Paranasal sinuses* - While paranasal sinus cancers can be aggressive, they are less commonly associated with the development of **second primary tumors** within the head and neck compared to oral cavity cancers. - The etiology of paranasal sinus cancers is often linked to specific exposures like wood dust or nickel, which are less broadly distributed across the upper aerodigestive tract compared to tobacco and alcohol. *Hypopharynx* - Hypopharyngeal cancers do carry a significant risk of developing **second primary tumors**, particularly in the esophagus and lungs, but the overall incidence of head and neck SPTs is generally considered lower than that for oral cavity cancers. - The anatomical location and typical lymphatic drainage patterns of hypopharyngeal cancers might direct SPTs to different sites compared to oral cavity cancers. *Larynx* - Laryngeal cancers, especially those of the **glottis**, are also strongly associated with tobacco and alcohol. However, the incidence of **second primary tumors** in other head and neck sites is typically reported to be lower than in oral cavity cancer patients. - While laryngeal cancer patients are at risk for SPTs in the lung and esophagus, the synchronous or metachronous development of another primary tumor *within* the head and neck region is more prevalent in oral cavity cases.
Want unlimited practice?
Get full access to all questions, explanations, and performance tracking.
Start For Free