Scalp Reconstruction Techniques in Children With a Focus on Tissue Expansion

Abstract

This study evaluates the efficacy of various scalp reconstruction techniques in pediatric patients, with a focus on tissue expansion. We retrospectively analyzed 26 cases of scalp defects in children treated at our institution. The most common causes were burn injuries (65.4%), followed by road traffic accidents (19.2%). Tissue expansion was the primary reconstruction method, with satisfactory outcomes in most cases. Complications were observed in 23% of cases, predominantly related to the expansion process. Our results suggest that tissue expansion is a reliable method for pediatric scalp reconstruction, offering good esthetic results with manageable complications.

Introduction

Scalp defects in pediatric patients represent unique challenges due to the limited local tissue availability and the need for esthetically pleasing results. ¹ These defects can result from various etiologies, including burns, trauma, tumors, and congenital conditions, each requiring a tailored approach to reconstruction. ² The scalp’s complex anatomy, with its thick galea and dense hair follicles, further complicates the reconstruction process. ³

Over the years, multiple techniques have been developed for scalp reconstruction, ranging from primary closure and skin grafting to more complex procedures like tissue expansion and free flap transfer. ⁴ Among these, tissue expansion has gained popularity in pediatric cases due to its ability to provide hair-bearing scalp tissue with good color and texture match. ⁵ However, the prolonged treatment duration and potential for complications necessitate careful patient selection and management. ⁶

The aim of this study was to evaluate the outcomes of various scalp reconstruction techniques in pediatric patients, with a particular focus on tissue expansion. We sought to analyze the efficiency of these techniques, identify potential complications, and provide insights into optimizing treatment strategies for this challenging population.

Materials and Methods

Study Design and Reporting Guidelines

This study is a retrospective review of 26 cases of scalp reconstruction in pediatric patients. The manuscript has been drafted and reported in accordance with the STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) guidelines, as recommended by the EQUATOR network.

Patient Selection and Data Collection

Our study design involved a retrospective analysis of pediatric patients who underwent scalp reconstruction at the reconstructive surgery unit at the children’s hospital between January 2015 and December 2023. We included patients aged 0 to 15 years with scalp defects requiring surgical intervention, while excluding those with incomplete medical records or follow-up periods less than 6 months.

Data collection included patient demographics, etiology of the defect, its characteristics (size and location), treatment details, complications, and outcomes. We meticulously documented the treatment protocol, including the type and size of tissue expanders used, expansion duration, and specific reconstruction techniques employed for each case. ⁷

Surgical Technique

The standard surgical technique for tissue expansion followed a systematic approach. Preoperative planning involved careful marking of the expansion site. Under general anesthesia, we placed silicone tissue expanders in the subgaleal plane. (Figure 1)

Figure 1.

Surgical steps of tissue expansion. (a) Marking and infiltration, (b) Incision and dissection, (c) Expander testing, (d) Expander placement, and (e) Suture and inflation.

The duration of the expansion process typically spanned between 8 and 12 weeks, with weekly follow-ups for inflation. A single expansion cycle was defined as the process of placing, inflating, and removing a tissue expander in 1 continuous period without interruption. Once the desired expansion was achieved, we removed the expander and performed flap advancement or rotation to reconstruct the defect. In cases where tissue expansion was deemed unsuitable, we employed alternative techniques such as local flaps, skin grafting, or primary closure, tailoring our approach to the specific requirements of each case. ⁸

Postoperative Care and Follow-Up

Postoperative care and follow-ups were crucial components of our protocol. Patients were typically discharged 24 to 48 hours after the initial expander placement, with clear detailed instructions for wound care and activity restrictions. We scheduled weekly follow-ups for expander inflation and monitoring. After the final reconstruction, patients were seen for follow-ups after 1 week, 1 month, 3 months, 6 months, and then annually.

Outcome Assessment

Outcome assessment was multifaceted, incorporating both objective and subjective measures. Satisfaction rates were determined independently by both the treating physicians and the parents/patients. The physicians evaluated outcomes based on technical success, esthetic results, and functional restoration, while the parents/patients assessed outcomes based on esthetic appearance, comfort, and overall satisfaction with the reconstruction. The assessments from both groups were compared to identify any discrepancies in satisfaction levels.

A 3-tier rating system was used to quantify satisfaction: satisfactory, moderately satisfactory, or unsatisfactory. This scale was chosen for its simplicity and ease of use in a pediatric population, where detailed scoring systems might be less practical. Acceptable scalp quality was defined as the presence of healthy, hair-bearing scalp tissue with good vascularity, minimal scarring, and adequate thickness for reconstruction. Satisfactory outcomes were defined as those meeting both functional and esthetic goals with no major complications. Moderately satisfactory outcomes included minor esthetic or functional compromises, while unsatisfactory outcomes involved significant complications or poor esthetic results.

Complications were meticulously documented and categorized as minor or major. We also noted any need for revision surgeries and assessed long-term esthetic results, including hair growth and scar quality. ⁹

Statistical Analysis

For statistical analysis, we utilized SPSS version 25.0. Descriptive statistics were applied to demographic and clinical characteristics. We used the Chi-square test for comparing categorical variables and Student’s t-test for continuous variables, with a P-value < .05 considered statistically significant.

Ethical Approval

No ethical approval is required for de-identified case reports and case series based on our institutional policies.

Consent

Written informed consent was obtained from the patient’s legally authorized representatives.

Results

Our study cohort consisted of 26 patients, with a slight male predominance (15 males, 11 females) and a mean age of 7.3 years (range: 2-15 years). The etiology of scalp defects in our series reflected patterns commonly observed in developing countries. ¹⁰ Burn injuries were the most prevalent cause, accounting for 65.4% of cases (n = 17). Road traffic accidents followed as the second most common etiology at 19.2% (n = 5), while the remaining 15.4% (n = 4) were attributed to various causes including tumors and animal bites. (Figure 2)

Figure 2.

Management of a parieto-occipital scalp defect secondary to a donkey attack using skin grafting followed by expansion with satisfactory results.

The anatomical distribution of defects provided insights into the most vulnerable areas of the scalp in pediatric trauma. The fronto-parietal region was most frequently affected, comprising 38.5% of cases (n = 10). (Figure 3) The occipital region accounted for 30.8% of defects (n = 8), while the remaining 30.8% (n = 8) involved multiple regions, highlighting the often extensive nature of pediatric scalp injuries. The mean defect size in our series was 78 cm² (range: 20-180 cm²), underscoring the significant tissue loss often encountered in these cases. (Table 1)

Figure 3.

Management of a fronto-parietal scalp defect secondary to a burn using tissue expansion.

Table 1.

Patient Demographics and Defect Characteristics.

Characteristic	Value
Total patients	26
Gender	Male: 15 (57.7%), Female: 11 (42.3%)
Mean age	7.3 years (range: 2-15 years)
Etiology	Burns: 17 (65.4%), Road traffic accidents: 5 (19.2%), Others: 4 (15.4%)
Defect location	Fronto-parietal: 10 (38.5%), Occipital: 8 (30.8%), Multiple regions: 8 (30.8%)
Mean defect size	78 cm² (range: 20-180 cm²)

In terms of treatment modalities, tissue expansion emerged as the cornerstone of our reconstructive approach, employed in 84.6% of cases (n = 22). This preference for tissue expansion aligns with current trends in pediatric scalp reconstruction, reflecting its ability to provide optimal tissue match and hair-bearing coverage. ¹¹ Of the 4 patients who did not undergo tissue expansion, 2 had acute burn wounds with active infection precluding expander placement, and 2 families declined due to concerns about prolonged treatment duration. These cases were managed with local flaps (n = 2) or split-thickness skin grafts (n = 2).

Focusing on the tissue expansion cases, we observed a mean number of 1.4 expanders used per patient (range: 1-3). The average expander size was 450 ml (range: 200-700 ml), with the choice of size carefully tailored to the defect dimensions and available scalp laxity. The mean expansion duration was 10.2 weeks (range: 8-14 weeks), reflecting the gradual nature of the expansion process necessary to achieve optimal tissue gain while minimizing complications. ¹² (Table 2)

Table 2.

Tissue Expansion Characteristics.

Characteristic	Value
Patients undergoing tissue expansion	22 (84.6%)
Mean number of expanders per patient	1.4 (range: 1-3)
Mean expander size	450 ml (range: 200-700 ml)
Mean expansion duration	10.2 weeks (range: 8-14 weeks)

Complications were observed in 23.1% of cases (n = 6), a rate comparable to those reported in the literature for pediatric tissue expansion. ¹³ The majority of these complications were minor and related to the expansion process. Expander exposure and infection were the most common issues, each occurring in 7.7% of cases (n = 2). Seroma and hematoma formation were less frequent, each affecting 3.8% of patients (n = 1). (Table 3)

Table 3.

Complications.

Complication	Number of cases (%)
Expander exposure	2 (7.7%)
Infection	2 (7.7%)
Seroma	1 (3.8%)
Hematoma	1 (3.8%)
Total	6 (23.1%)

Notably, 2 patients required early removal of the expander due to infection, necessitating a change in the reconstruction plan. These cases were successfully managed with local flaps and skin grafting, highlighting the importance of having alternative strategies in the reconstructive process. ¹⁴

The outcomes of our reconstructive efforts were largely positive, with satisfactory results achieved in 84.6% of cases (n = 22), as assessed by both surgeons and patients/parents. This high satisfaction rate underscores the efficacy of our approach, particularly the predominant use of tissue expansion. Our analysis revealed several factors associated with better outcomes, including single expansion cycles (P = .03), defect sizes less than 100 cm² (P = .04), and the absence of complications (P = .01). These findings provide valuable insights for optimizing patient selection and treatment planning in future cases. ¹⁵

Long-term follow-up, with a mean duration of 3.2 years (range 1-5 years), demonstrated stable results in the majority of cases. We observed good hair growth and acceptable scar quality in most patients, affirming the durability of the reconstructive outcomes. (Table 4) However, it’s worth noting that 11.5% of patients (n = 3) required minor revision surgeries for scar improvement or hair transplantation, highlighting the potential need for secondary procedures to achieve optimal esthetic results. ¹⁶ (Figure 4)

Table 4.

Outcome Summary.

Outcome measure	Result
Satisfactory results	22 (84.6%)
Factors associated with better outcomes	Single expansion cycles (P = .03), Defect size < 100 cm² (P = .04), Absence of complications (P = .01)
Mean follow-up duration	3.2 years (range: 1-5 years)
Patients requiring revision surgeries	3 (11.5%)

Figure 4.

Management of a large scalp defect secondary to a road accident using 2 expanders.

Discussion

The results of our study provide compelling evidence for the efficacy of tissue expansion in pediatric scalp reconstruction. The high success rate of 84.6% observed in our series aligns with previous studies highlighting the benefits of this technique in providing hair-bearing scalp tissue with excellent color and texture match. ¹⁷ This outcome is particularly crucial in the pediatric population, where esthetic considerations can have significant psychosocial implications.

The predominance of burn injuries (65.4%) as the etiology in our cohort reflects a pattern commonly observed in developing countries. ¹⁸ The significant proportion of road traffic accidents (19.2%) as the second most common cause further emphasizes the importance of public safety measures and awareness campaigns targeting child safety in transportation.

Our complication rate of 23.1% falls within the range reported in the literature for pediatric tissue expansion, typically varying from 15% to 30%. ¹⁹ The majority of complications we encountered were minor and manageable, supporting the overall safety profile of tissue expansion in pediatric patients. However, the 2 cases requiring early expander removal due to infection highlight the importance of vigilant monitoring and prompt intervention. (Figure 5) These instances underscore the need for meticulous surgical technique, appropriate antibiotic prophylaxis, and careful patient selection to minimize such occurrences. ²⁰

Figure 5.

Exteriorization of an expander secondary to infection. (a) Patient presenting an exteriorized expander during the follow-up, and (b) Pre-operative image.

The association we found between single expansion cycles, smaller defect sizes, and better outcomes provides valuable guidance for treatment planning. This relationship likely stems from reduced tissue trauma and easier flap inset in cases with more favorable characteristics. The inverse correlation between complications and satisfaction scores further emphasizes the critical role of complication prevention in achieving optimal results. These findings suggest that surgeons should carefully weigh the benefits of extensive expansion against the potential for complications, particularly in cases requiring multiple expanders or prolonged expansion periods. ²¹

Long-term results from our study, demonstrating stable outcomes and good hair growth, support the durability of tissue expansion in pediatric scalp reconstruction. This aspect is particularly crucial in children due to growth, therefore the reconstructed area must adapt to changes in head size and shape over time. The high satisfaction scores reflect not only the technical success of the procedures but also the potential positive impact on the psychosocial well-being of affected children. ²²

While tissue expansion was our predominant technique, it’s important to note that other methods such as local flaps and skin grafting retain their value in selected cases. (Figure 6) The choice of reconstruction technique should be individualized based on defect characteristics, patient factors, and surgeon expertise. In cases of very large defects or multiple failed expansions, free tissue transfer may be considered as a rescue option, though this was not required in our series. ²³

Figure 6.

Management of a scalp defect secondary to under tension suture using local flap.

Pediatric patients present unique challenges distinct from adults, including thinner scalp tissues, higher metabolic demands, and the need for growth-adapted reconstruction. ¹⁷ Tissue expansion addresses these by preserving hair follicles and enabling growth-matched coverage. ¹⁸ Children also tolerate serial expansions better due to skin elasticity, though compliance with follow-up requires family engagement. ¹⁹ Conversely, adults often have comorbidities (eg, vascular disease) that limit expansion efficacy, but they may tolerate complex flaps better. ²⁰ Our data underscore tissue expansion as particularly advantageous in children, with lower complication rates (23.1% vs 30-40% in adult series^12,17) and superior esthetic outcomes due to scalp plasticity. ²¹

We acknowledge several limitations in our study. Its retrospective nature introduces potential bias in outcome assessment. Additionally, the relatively small sample size limits the generalization of our results. Future prospective studies with larger cohorts and longer follow-up periods would provide stronger evidence on the long-term outcomes of pediatric scalp reconstruction. ²⁴

Despite these limitations, our study contributes with some valuable insights into the management of pediatric scalp defects. The high satisfaction rates and acceptable complication profile support the continued use of tissue expansion as a primary reconstruction method in this population. However, the technique is not without challenges, including the prolonged treatment duration and the need for multiple surgical procedures. Patient and family education, along with psychological support, are crucial components of the treatment process to ensure compliance and manage expectations. ²⁵

Looking ahead, several areas warrant further investigation to advance the field of pediatric scalp reconstruction. The development of expanders specifically designed for pediatric use, with improved profiles and reduced complication rates, could enhance outcomes. Exploration of adjunctive therapies, such as growth factors or other biological agents, to accelerate the expansion process or improve the quality of expanded tissue may yield promising results. Long-term studies following patients into adulthood would provide valuable data on the stability and growth adaptation of reconstructed scalp tissue over time. ¹⁰

Conclusion

Pediatric scalp reconstruction remains a challenging endeavor, requiring a thoughtful and individualized approach to achieve optimal functional and esthetic outcomes. Our study demonstrates that tissue expansion is a reliable and effective technique for scalp reconstruction in children, offering good results with manageable complications. Key factors for success include careful patient selection, meticulous surgical technique, and vigilant postoperative care.

The high satisfaction rates observed in our series underscore the potential of tissue expansion to significantly improve the quality of life for children with scalp defects. However, the technique is not without risks, and surgeons must be prepared to manage complications and adjust treatment plans when needed. While tissue expansion often emerges as the preferred method, proficiency in various reconstruction techniques is essential to address the diverse presentations of scalp defects in the pediatric population.

As we look to the future, continued research and innovation in this field hold the promise of further enhancing outcomes for children with scalp defects. By refining our approaches, developing new technologies, and sharing knowledge across the global surgical community, we can work toward better solutions for this challenging patient population. Ultimately, the goal of pediatric scalp reconstruction extends beyond mere tissue coverage – it aims to restore normalcy, boost self-esteem, and improve the overall well-being of affected children, allowing them to face the world with confidence.