Related Experiment Video
Updated: Mar 13, 2026
Spontaneous Murine Model of Anaplastic Thyroid Cancer
Published on: February 3, 2023
Successful Management of a Patient with Malignant Thyroid Teratoma
Guilherme Rabinowits1, Justine Barletta2, Lynette M Sholl2
11 Medical Oncology, Dana-Farber Cancer Institute , Boston, Massachusetts.
Background:
Malignant thyroid teratomas are rare tumors with a poor prognosis. Little is known about their pathogenesis or treatment. Here, the case is reported of an adult woman with an aggressive thyroid teratoma with primitive neuroectodermal tumor (PNET) malignant transformation, successfully managed with neoadjuvant chemotherapy and surgery.
Patient Findings:
Sequencing of paired tumor and normal tissues revealed a DICER1 c.5438A>G (p.E1813G) somatic mutation in 56% of sequencing reads consistent with a driver event.
Summary And Conclusions:
To the authors' knowledge, DICER1 mutations have not been previously reported in teratomas but have been described in PNETs, suggesting a role in the malignant transformation of this case.
Insights
This study reports a rare aggressive thyroid teratoma with malignant transformation, successfully treated with chemotherapy and surgery. A DICER1 mutation was identified, suggesting its role in the tumor's development.
Area of Science:
- Oncology
- Genetics
- Pathology
Background:
- Malignant thyroid teratomas are rare and aggressive tumors with limited understanding of their development and treatment.
- Primitive neuroectodermal tumor (PNET) transformation in thyroid teratomas is exceptionally uncommon.
Observation:
- An adult woman presented with an aggressive thyroid teratoma exhibiting malignant transformation into a PNET.
- Tumor and normal tissue sequencing identified a DICER1 c.5438A>G (p.E1813G) somatic mutation in 56% of sequencing reads.
Findings:
- The identified DICER1 mutation is proposed as a driver event contributing to the malignant transformation.
- This is the first report of DICER1 mutations in teratomas, though previously noted in PNETs.
Implications:
- This case highlights a potential genetic mechanism in the malignant progression of thyroid teratomas.
- The findings suggest that DICER1 mutations may play a role in PNET development within teratomas.
- Successful management with neoadjuvant chemotherapy and surgery offers a potential therapeutic strategy for similar rare cases.
