The Importance of Clinical Interpretation of Biopsy Results in Thoracic Mesenchymal Tumours
Presentation Type: Clinical Case Presentation
Year: 2026
Institution: Department of Thoracic Surgery, University Medical Center Mainz, Germany
Congress: DGT 2026
Authors: A. Karimova, M. Jägersberg, F. Traub, M. Fried, E. Rössner
Presentation Overview
This clinical case highlights the importance of interpreting biopsy results in the context of radiological findings and the overall clinical presentation, particularly when evaluating thoracic mesenchymal tumours.
The case concerns a 31-year-old female patient who presented with thoracic back pain and right-sided Th6 radiculopathy. Magnetic resonance imaging revealed an intrathoracic mass measuring 7.3 × 4.8 × 5.3 cm, with imaging characteristics strongly suggesting malignancy.
Initially, a CT-guided core needle biopsy favoured a benign neurogenic tumour. However, this finding was inconsistent with the radiological assessment, creating a significant diagnostic discrepancy. Further tissue sampling through an incisional biopsy subsequently identified a malignant chondrogenic tumour, fundamentally changing the diagnosis and the planned surgical approach.
Diagnostic Challenges and Surgical Decision-Making
This case demonstrates the limitations of relying exclusively on a single biopsy result. In heterogeneous tumours, a small tissue sample may not accurately represent the biological characteristics of the entire lesion. This sampling error can potentially lead to an incorrect diagnosis and an inadequate treatment strategy.
Following the revised diagnosis, the surgical approach was changed from a potentially marginal resection to a compartment-oriented en bloc resection involving the vertebral and chest wall components, supported by video-assisted thoracoscopic surgery (VATS).
The revised surgical strategy enabled resection with clear margins, highlighting the importance of accurate diagnosis and appropriate preoperative planning in complex thoracic oncology cases.
Key Clinical Lessons
Three important messages emerge from this case:
1. Core needle biopsies can be misleading.
A limited tissue sample may not fully reflect the nature of a heterogeneous tumour.
2. Histological findings must be consistent with clinical and radiological evidence.
Biopsy results should always be interpreted alongside imaging findings and the patient’s clinical presentation.
3. Diagnostic discrepancies must influence clinical decision-making.
When histology and imaging findings do not correspond, further diagnostic evaluation may be necessary before determining the definitive treatment strategy.
Conclusion
The case underlines the importance of a multidisciplinary diagnostic approach and careful correlation between histopathological and radiological findings in the management of thoracic mesenchymal tumours.
Accurate diagnosis is not merely a matter of identifying the tumour type. It is a decisive factor in selecting the appropriate surgical strategy, achieving oncologically adequate resection, and ensuring patient safety.
The right diagnosis is the foundation of the right surgical strategy.