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Desmoplastic stromal reaction in papillary thyroid microcarcinoma
Oskar Koperek1, Reza Asari, Bruno Niederle
1Department of Clinical Pathology, Medical University of Vienna, Austria.
Histopathology
|April 12, 2011
Summary
Desmoplasia, a stromal reaction, indicates invasive behavior in papillary thyroid microcarcinoma and is linked to lymph node metastasis. Tumors without desmoplasia may represent non-invasive neoplasias.
Area of Science:
- Oncology
- Pathology
- Endocrinology
Background:
- Papillary thyroid microcarcinoma (PTMC) is the most common thyroid cancer.
- Distinguishing invasive PTMC from non-invasive lesions is crucial for appropriate management.
- Desmoplastic stromal reaction (desmoplasia) is a host response observed in various cancers.
Purpose of the Study:
- To investigate the association between desmoplasia and metastasis in PTMC.
- To evaluate desmoplasia as a potential indicator of invasive behavior in PTMC.
Main Methods:
- Retrospective analysis of 109 PTMC cases from the Medical University of Vienna.
- Assessment of desmoplasia and correlation with clinicopathological parameters, including lymph node metastasis, tumor diameter, and invasion.
- Statistical analysis to determine significant associations.
Main Results:
- Desmoplasia was present in 81 of 109 (74.3%) PTMC cases.
- Desmoplasia significantly correlated with lymph node metastases (P=0.001) and larger tumor diameter (P<0.001).
- Invasive parameters like peritumoral and vascular invasion were associated with desmoplasia; all pT3b tumors exhibited desmoplasia.
Conclusions:
- Desmoplasia is a significant indicator of invasive behavior in PTMC.
- The presence of desmoplasia is strongly associated with lymph node metastasis.
- PTMC without desmoplasia may represent non-invasive intraepithelial neoplasias, warranting careful pathological assessment.
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