Nodular fasciitis is a benign, reactive soft tissue lesion often arising in the fascia and subcutaneous tissues. Initially described by the pathologist Dr. H. L. Clark in the mid-20th century, nodular fasciitis is characterised by its rapid growth and potential for local recurrence, although it is not malignant. The conventional treatment approach for nodular fasciitis typically involves surgical excision, which usually provides a satisfactory outcome. However, there is growing interest in the role of radiation therapy as an alternative or adjunctive treatment, particularly in cases where surgery may not be feasible or desired.

Understanding nodular fasciitis

Clinical presentation

Nodular fasciitis commonly presents as a solitary, painful, rapidly growing mass in the subcutaneous tissue. It most frequently affects young adults, though it can occur in any age group. The lesion can be located in various body parts but is often found in the upper extremities, trunk, or head and neck region. Diagnosis is often made based on clinical presentation and confirmed by histopathological examination.

Histopathological features

Histologically, nodular fasciitis is characterised by a proliferation of fibroblasts and myofibroblasts arranged in a storiform pattern, with a background of inflammatory cells. The lesions are typically well-circumscribed and lack the infiltrative characteristics seen in malignant tumours. Although the histological features of nodular fasciitis are distinctive, its rapid growth and presentation can mimic more aggressive neoplasms, making accurate diagnosis crucial.

Traditional management approaches

Surgical excision

Surgical excision remains the standard treatment for nodular fasciitis. The goal is to completely remove the lesion with a margin of healthy tissue to minimise the risk of local recurrence. Most patients experience resolution of symptoms and are disease-free post-surgery. However, in cases where complete surgical excision is challenging due to the location of the lesion or patient comorbidities, radiation therapy may be considered as an alternative or adjunctive treatment.

Limitations of surgery

Surgical management can be limited by several factors:

• Inaccessibility: Lesions located in anatomically difficult areas may be challenging to excise completely
• Risk of Recurrence: Incomplete resection can lead to local recurrence, necessitating additional interventions
• Patient Factors: Patients with significant medical comorbidities or those who refuse surgery may not be ideal candidates for traditional surgical approaches

Role of radiation therapy

Rationale for radiation therapy

Radiation therapy offers a non-invasive alternative to surgical excision for treating nodular fasciitis. It is particularly useful in cases where surgery is not feasible, or as an adjunct to surgery to address residual or recurrent disease. The rationale for using radiation therapy includes:

• Precision: Advances in radiotherapy techniques allow for precise targeting of the tumour, minimising damage to surrounding healthy tissue
• Minimally Invasive: Radiation therapy is non-invasive and may be preferable for patients who are not candidates for surgery
• Effective for Residual Disease: It can be effective in managing residual or recurrent nodular fasciitis after incomplete surgical resection

Mechanism of action

Radiation therapy works by damaging the DNA of rapidly dividing cells, leading to cell death. This is achieved through high-energy X-rays or other forms of radiation delivered to the targeted area. The treatment aims to destroy tumour cells while preserving the integrity of surrounding healthy tissues.

Indications for radiation therapy

Radiation therapy may be indicated in the following scenarios:

• Inoperable Lesions: Cases where surgical excision is not possible due to the lesion’s location or size
• Recurrent Disease: When nodular fasciitis recurs after initial surgical treatment
• Patient Preference: For patients who prefer to avoid surgery or who have significant medical risks associated with surgery

Evidence and outcomes

Clinical evidence

Several studies and case reports have explored the efficacy of radiation therapy in managing nodular fasciitis. Research indicates that radiation therapy can be an effective treatment modality, particularly in cases where surgery is not feasible or has failed. A review of the literature reveals:

• Case Series: Studies have documented successful outcomes with radiation therapy, including the resolution of symptoms and the absence of recurrence
• Dose and Protocol: The radiation doses typically used range from 30 to 50 Gy, delivered in fractionated doses over several weeks. The specific dose and fractionation schedule depend on the individual case and treatment goals

Comparison with surgery

Comparative studies between surgery and radiation therapy are limited, but available data suggest that radiation therapy can be an effective alternative when surgical options are limited. In cases where surgery is not possible, radiation therapy provides a viable option with comparable outcomes in terms of disease control and symptom relief.^1,2

Potential side effects and considerations

Acute and chronic effects

Radiation therapy, while effective, is not without potential side effects. Acute effects may include skin irritation, fatigue, and localised pain. Chronic effects, though less common, may involve changes in skin texture, pigmentation, or other long-term tissue changes.

Patient management

Effective management of side effects and ensuring patient adherence to treatment are crucial for optimising outcomes. Patients undergoing radiation therapy should be monitored for any adverse effects and provided with appropriate supportive care.

Multidisciplinary approach

A multidisciplinary approach involving radiologists, oncologists, and surgeons is essential for comprehensive management of nodular fasciitis. This team approach ensures that treatment decisions are tailored to the individual patient’s needs and that all available options are considered.

Conclusion

Radiation therapy represents a significant advancement in the management of nodular fasciitis, offering an effective treatment alternative when surgical intervention is not feasible or has proven insufficient. Historically, surgical excision has been the cornerstone of treatment for this benign yet often problematic lesion, providing high rates of success and minimal risk of recurrence. However, in cases where surgery is not a viable option due to the lesion's location, patient comorbidities, or patient preference, radiation therapy presents a compelling alternative.

The integration of radiation therapy into the treatment paradigm for nodular fasciitis addresses several key challenges. For patients with inoperable lesions or those who experience recurrence following surgical resection, radiation therapy offers a non-invasive approach with the potential to achieve local disease control and symptom relief. The precision of modern radiotherapy techniques allows for targeted treatment, minimising damage to surrounding healthy tissues while delivering an effective dose to the tumour.

Clinical evidence supports the efficacy of radiation therapy, with studies demonstrating successful outcomes in terms of symptom resolution and disease control. While the body of evidence continues to grow, existing research underscores the role of radiation therapy as a valuable tool in the multidisciplinary management of nodular fasciitis. The choice of treatment—whether surgical, radiotherapeutic, or a combination—should be individualised based on patient-specific factors, including the lesion's characteristics, the patient's overall health, and their preferences.

Despite its benefits, radiation therapy is not without potential side effects. Acute reactions such as skin irritation and fatigue, as well as potential long-term effects like changes in skin texture or pigmentation, must be managed carefully. A comprehensive approach that includes monitoring for side effects and providing supportive care is essential for optimising patient outcomes.

As we move forward, continued research and clinical trials will be instrumental in further defining the role of radiation therapy in managing nodular fasciitis. These studies will provide deeper insights into optimal dosing regimens, long-term outcomes, and the comparative effectiveness of radiation therapy versus traditional surgical approaches. In the evolving landscape of treatment options, radiation therapy exemplifies the progress made in offering tailored, patient-centered care that balances effectiveness with minimal invasiveness.In conclusion, radiation therapy enhances the treatment arsenal for nodular fasciitis, providing an effective option for patients who are not ideal candidates for surgery or who require additional management for recurrent disease. By integrating this modality into a multidisciplinary care approach, healthcare providers can offer comprehensive, personalised treatment plans that address the unique needs of each patient. As our understanding of this therapy continues to expand, it will undoubtedly play an increasingly pivotal role in the management of nodular fasciitis, underscoring the importance of innovation and adaptability in modern medical practice.^3,4