Nodular Fasciitis May Mimic Sarcoma - Takeaways - MDSpire

Nodular Fasciitis May Mimic Sarcoma

Molecular testing may help avoid overtreatment when benign soft-tissue tumors present with atypical clinical or histologic features.

  • By

  • Andrea Surnit

  • May 11, 2026

  • 4 min

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  • 1

    Nodular fasciitis can mimic sarcoma, leading to potential misdiagnosis and unnecessary aggressive treatment for a generally benign condition.

  • 2

    A retrospective review of 29 cases revealed that 19 had nonspecific presentations, complicating the diagnosis of nodular fasciitis.

  • 3

    Molecular testing, including FISH and NGS, identified USP6 gene fusions in many cases, aiding in the differentiation from malignant tumors.

  • 4

    Histopathologic findings were consistent with nodular fasciitis, but variability in features contributed to diagnostic uncertainty.

  • 5

    The study emphasizes that negative FISH results should not exclude nodular fasciitis diagnosis when histologic findings are suggestive.

Original Source(s)

Nodular Fasciitis May Mimic Sarcoma

  • by Andrea Surnit

  • May 11, 2026

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