NTRK -rearranged Spindle Cell Neoplasm of the Uterus: An Emerging Entity.

Int J Gynecol PatholOct 6, 2025 (epub)

Haley Corbin, Shikha Malhotra, Kanika Goel et al.

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Case in brief

The report describes an NTRK-rearranged spindle cell neoplasm arising in the uterine corpus. Molecular testing identified an NTRK1::TIMP3 fusion. Immunohistochemistry showed diffuse positivity for desmin and progesterone receptor, with negative staining for CD34 and S100. This profile differs from the typical pattern described for these neoplasms, which is CD34- and S100-positive and desmin- and hormone-receptor-negative. The abstract does not provide further clinical presentation, treatment, or outcome details.

What made this case unusual

The uterine corpus location, previously unreported NTRK1::TIMP3 fusion partner, and immunophenotype—diffuse desmin and progesterone receptor positivity with CD34 and S100 negativity—are atypical for this entity.

Diagnostic / clinical pearl

An atypical immunohistochemical profile does not exclude an NTRK-rearranged spindle cell neoplasm; molecular identification of the fusion can clarify the diagnosis.

Source

Published in Int J Gynecol Pathol. This summary was written by xxcode from the publication's abstract and metadata. It is not peer reviewed and is not a substitute for the original article. For clinical decisions, review the original publication.

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AI-generated summaries may contain errors or omissions. Verify clinically important information with the original publication.

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