Local Flaps — MCQs
Wound contraction can be most effectively minimized by:
When osseous defects amenable to reconstruction are present, technique of choice is?
What type of graft or dressing is used to cover the post-burn wound shown in the image?
In periodontal surgical treatment, which of the following surgical procedures are typically carried out first:
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?
In which of the following situations is breast conservation surgery not indicated?
Most common complication of mastectomy is:
The Abbe flap is primarily used for the reconstruction of which anatomical structure?
Which muscle flap is commonly used for autologous breast reconstruction after mastectomy?
Which flap is commonly used in breast reconstruction?
Local Flaps 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: 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 3: What type of graft or dressing is used to cover the post-burn wound shown in the image?
- A. Split thickness skin graft (Correct Answer)
- B. Full thickness skin graft
- C. VAC dressing
- D. Normal saline dressing
Explanation: ***Split thickness skin graft*** - The image shows a **meshed pattern** on the skin graft, which is characteristic of a **split-thickness skin graft** that has been expanded to cover a larger area. - This type of graft consists of the epidermis and a portion of the dermis, making it more flexible and able to **"take" more reliably** on various wound beds, commonly used for burn wounds. *Full thickness skin graft* - A **full-thickness skin graft** includes the entire epidermis and dermis and typically does not have a meshed appearance. - They are used for smaller defects where cosmesis is a priority, but have a **lower take rate** than split-thickness grafts, making them less suitable for large burn wounds. *VAC dressing* - A **VAC (Vacuum-Assisted Closure) dressing** is a system that applies negative pressure to a wound to promote healing and is not a skin graft itself. - It involves a foam or gauze dressing sealed with an adhesive film, connected to a vacuum pump, which is not what is depicted in the image. *Normal saline dressing* - A **normal saline dressing** is a simple wet-to-dry or wet-to-wet dressing for wound care, involving gauze soaked in normal saline. - This is a basic wound management technique and does not involve grafting or have the characteristic meshed appearance seen in the image.
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: 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.
Question 6: In which of the following situations is breast conservation surgery not indicated?
- A. SLE
- B. Large pendular breast
- C. Diffuse microcalcification
- D. All of the options (Correct Answer)
Explanation: ***All of the options*** - All listed scenarios—**large pendular breast**, **SLE**, and **diffuse microcalcification**—represent situations where breast conservation surgery is generally contraindicated or challenging. - Their presence often necessitates alternative treatment approaches, such as mastectomy, to achieve optimal oncologic and cosmetic outcomes. *Large pendular breast* - While not an absolute contraindication, a **very large or pendulous breast** can make it difficult to achieve a satisfactory cosmetic outcome after breast conservation surgery. - The disproportionate breast size post-lumpectomy may lead to significant **asymmetry**, requiring further reconstructive procedures. *SLE* - Patients with **Systemic Lupus Erythematosus (SLE)** are at an increased risk of complications from radiation therapy, a mandatory component of breast conservation surgery. - They tend to experience more severe and prolonged **acute and chronic skin reactions** to radiation, which can significantly impair healing and quality of life. *Diffuse microcalcification* - **Diffuse microcalcification** within the breast can indicate widespread in situ carcinoma (e.g., DCIS) or an invasive carcinoma with extensive intraductal component. - In such cases, achieving **clear surgical margins** with breast conservation surgery can be challenging and often leads to multiple re-excisions or an increased risk of local recurrence.
Question 7: Most common complication of mastectomy is:
- A. Seroma (Correct Answer)
- B. Hemorrhage
- C. Infection
- D. Lymphedema
Explanation: ***Seroma*** - **Seroma** formation is the most common complication after mastectomy, involving the accumulation of serous fluid in the surgical dead space. - This complication can lead to discomfort, delayed wound healing, and an increased risk of infection. *Hemorrhage* - While a serious complication, **hemorrhage** is less common than seroma formation. - Significant hemorrhage usually occurs intraoperatively or in the immediate postoperative period and is typically managed promptly. *Lymphedema* - **Lymphedema** is a chronic condition characterized by swelling of the arm due to impaired lymphatic drainage, often developing months to years after surgery. - Although highly significant and debilitating, its incidence is lower than acute complications like seroma. *Infection* - Surgical site **infection** is a potential complication but is generally less frequent than seroma due to careful aseptic techniques and prophylactic antibiotics. - Infections can range from superficial wound infections to more serious cellulitis.
Question 8: The Abbe flap is primarily used for the reconstruction of which anatomical structure?
- A. Reconstruction of the lip (Correct Answer)
- B. Reconstruction of the eyelid
- C. Reconstruction of the tongue
- D. Reconstruction of the ear
Explanation: ***Reconstruction of the lip*** - The **Abbe flap** is a classic technique used for **lip reconstruction**, particularly for defects involving the full thickness of the lip. - It involves transferring tissue from one lip to the other to restore **oral competence**, **function**, and **aesthetics**. *Reconstruction of the eyelid* - Eyelid reconstruction often uses techniques like **Tenzel flaps** or **Hughes flaps**, which are specifically designed for the periorbital area. - The Abbe flap is not typically used for eyelid reconstruction due to differences in tissue characteristics and functional requirements. *Reconstruction of the tongue* - Tongue reconstruction usually involves **free flaps** such as the **radial forearm flap** or **anterolateral thigh flap**, chosen for their bulk and vascularity. - These flaps provide the necessary tissue volume and mobility for tongue function, which the Abbe flap cannot adequately achieve. *Reconstruction of the ear* - Ear reconstruction commonly employs rib cartilage grafts or local skin flaps like the **preauricular flap** or **postauricular flap** to recreate ear contours. - The delicate structure and specific cartilage requirements of ear reconstruction make the Abbe flap unsuitable for this purpose.
Question 9: Which muscle flap is commonly used for autologous breast reconstruction after mastectomy?
- A. Deltopectoral
- B. Serratus anterior
- C. Trapezius
- D. Latissimus dorsi (Correct Answer)
Explanation: ***Latissimus dorsi*** - The **latissimus dorsi** muscle is commonly used in **autologous breast reconstruction** due to its rich blood supply and ample tissue volume which can be transferred as a **pedicled flap** to the chest. - This flap includes muscle, skin, and subcutaneous fat, providing a good aesthetic outcome for **breast mound reconstruction** after mastectomy. *Deltopectoral* - The **deltopectoral flap** is primarily used for **head and neck reconstruction**, specifically for oral cavity and pharyngeal defects. - It involves muscle and skin from the **chest and shoulder region**, but its size and location make it less suitable for comprehensive breast reconstruction. *Serratus anterior* - The **serratus anterior** muscle is occasionally used as a **free flap** for small soft tissue defects, but it is not typically the first choice for large-volume breast reconstruction. - Its primary role is in **shoulder movement** and it does not provide sufficient tissue bulk for a complete breast mound. *Trapezius* - The **trapezius flap** is more commonly employed in **head and neck reconstruction** or for covering defects in the posterior shoulder region. - While it offers a good blood supply, its bulk and orientation are not ideal for **breast reconstruction**, which requires a more anterior and hemispheric shape.
Question 10: 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.
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