What the study found
The study found that quantitative nuclear morphometry, a way of measuring cell nucleus size and shape, captured changes linked to recurrence in chordoma. These changes aligned with immunophenotype and genomic profiling.
Why the authors say this matters
The authors conclude that this approach may provide a quantitative framework for future digital pathology or AI-based analysis, pending validation in larger cohorts. They also note that prognostic biomarkers for recurrence in chordoma are limited.
What the researchers tested
The researchers analyzed 26 specimens from 12 adults, including 8 with non-recurrent tumors and 4 with multiple long-term recurrences and metastases over 7 to 16 years. They used whole-exome sequencing, immunohistochemistry, and nuclear morphometry.
What worked and what didn't
Imaging studies and routine histology showed no consistent differences between the two groups. Morphometry showed substantial variation among non-recurrent tumors and significant nuclear remodeling across recurrences, with increased nuclear size, asymmetry, and altered shape; recurrent samples also showed higher proliferation and decreased lamin A/C expression. Tumor mutational burden was low overall, varied by patient and timepoint, and tended to be higher in recurrent cases.
What to keep in mind
The study was based on a small sample of 12 adults and 26 specimens. The abstract says the findings need validation in larger cohorts, and it does not describe additional limitations.
Key points
- Quantitative nuclear morphometry tracked recurrence-associated changes in chordoma.
- Routine histology and imaging did not show consistent group differences.
- Recurrent tumors showed larger, more asymmetric nuclei with altered shape.
- Primary tumors from patients who later recurred had smaller, more asymmetric, and denser nuclei.
- Recurrent samples showed higher proliferation and decreased lamin A/C expression.
- Tumor mutational burden was low overall but tended to be higher in recurrent cases.
Disclosure
- Research title:
- Nuclear shape changes track recurrence in chordoma
- Authors:
- Sarah R. Ullmann, Julian Schreier, Juan Carlos Alberto Uribe Caputi, Marilena Georgiades, Joana Maria Ullmann, Christoph H. Lohmann, Martin Röpke, Denny Schanze, Sabine Franke, Franziska Sabrina Karras, A. Roessner
- Institutions:
- Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Otto-von-Guericke-Universität Magdeburg, Universidad Autónoma de Bucaramanga, University of Rostock
- Publication date:
- 2026-03-11
- DOI:
- W7134905131
- OpenAlex record:
- View
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