A CASE OF MEDULLARY THYROID CARCINOMA DETECTED BY FLUORO-DEOXY-GLUCOSE-POSITRON EMISSION TOMOGRAPHY (FDG-PET) EXAMINATION DURING A MEDICAL CHECKUP FOR AN ELEVATED SERUM CEA VALUE

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  • OBA Takaaki
    Department of Breast and Endocrine Surgery, Nagano Matsushiro General Hospital
  • KASUGA Yoshio
    Department of Breast and Endocrine Surgery, Nagano Matsushiro General Hospital
  • HARADA Michihiko
    Department of Breast and Endocrine Surgery, Nagano Matsushiro General Hospital
  • UEHARA Takeshi
    Division of Central Laboratory, Shinshu University Hospital

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  • ＣＥＡ高値の精査中ＦＤＧ‐ＰＥＴ検査にて発見された甲状腺髄様癌の１例

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Abstract

Medullary thyroid carcinoma is a relatively rare phenomenon. We report a case of medullary thyroid carcinoma detected by FDG-PET examination during a medical checkup for an elevated serum CEA value. A 67-year-old female was identified with an elevated serum CEA value by a general practitioner. GI tract and lung CT examinations showed no abnormal findings. However, FDG-PET examination identified an intensive signal mass in the left thyroid lobe. For further examinations, she was referred to our hospital.<BR>Aspiration biopsy cytology showed a malignant tumor of the thyroid gland. In addition, medullary thyroid carcinoma was highly suspected from high serum CEA and calcitonin values. Therefore, a left lobectomy, isthmectomy and left modified neck dissection were performed.<BR>Pathological and immunohistochemical findings led to a diagnosis of medullary thyroid carcinoma.

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