DOI: https://doi.org/10.36347/sjmcr.2026.v14i05.021

Pages: 952-955

Background: Nodular fasciitis is a benign, self-limiting myofibroblastic proliferation that is often clinico-pathologically mistaken for a malignant soft tissue sarcoma due to its rapid growth and high cellularity. While it can occur anywhere, it is frequently found in the upper extremities and trunk of young adults. Case Presentation: We report the case of a 9-year-old patient presenting with a rapidly enlarging, subcutaneous mass located on the back. Initial clinical and radiological assessments were suggestive of a schwannoma or lipoma. A complete surgical excision was performed and the diagnosis of nodular fasciitis was confirmed finally through histological and immunohistochemical examination. Conclusion: Nodular fasciitis remains a "great imitator" in soft tissue pathology. This case highlights the essential role of immunohistochemistry in preventing diagnostic pitfalls and avoiding overly aggressive surgical interventions for a benign lesion with an excellent prognosis.