Primary Malignant Teratoma with a Primitive Neuroectodermal Tumor Component in Thyroid Gland : A Case Report

Research Institute and Hospital, National Cancer Center, 809 Madu-1-dong, Ilsan-gu, Goyang, Korea.
Journal of Korean Medical Science (Impact Factor: 1.27). 07/2007; 22(3):568-71. DOI: 10.3346/jkms.2007.22.3.568
Source: PubMed


Teratomas comprise the most common extragonadal germ cell tumors in childhood. Most teratomas involving the thyroid are benign and occur in children. However, the adult cases reported are mostly malignant and commonly arise in the thyroid. We report a case of a 31-yr-old female with a huge neck mass. Pathologic examination revealed it to be malignant teratoma composed of primitive neuroepithelial tissue with primitive neural tubes and loose myxoid to fibrous immature mesenchymal stroma. The patient underwent extensive evaluation of the thyroid gland with computed tomography (CT) scan and positron emission tomography (PET) scan, which revealed no evidence of metastatic disease. She underwent total thyroidectomy with bilateral modified radical neck dissection, intensive chemotherapy and radiotherapy. At 22-months of follow-up, the patient has remained euthyroid and showed no evidence of recurrence. This is the first case, to our knowledge, of malignant thyroid teratoma with a exuberant primitive neuroectodermal tumor component in Korea.

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Available from: Ki-Wook Chung, May 09, 2014
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    • "This is the first case of benign thyroid teratoma in South Korea. Kim et al. [7] reported a case of malignant thyroid teratoma that included primitive neuroectodermal tissue. In that case, the infiltration into extrathyroid soft tissue and metastasis of lymph nodes was evident even during diagnosis. "
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    • "Primitive neuroectodermal tumors (PNETs) belong to the Ewing family of tumors and represent 1% of sarcomas.1-3 Largest head and neck series included at most 11 cases occurring in various sites.4-6 "
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