A Patient Presented with Extensive Lung Metastases of Papillary Thyroid Carcinoma Without Any Primary Focus Detected on Total Thyroidectomy

  • Tevfik Fikret Çermik
  • Nurhan Ergül


The most common metastatic sites of differentiated thyroid cancer (DTC) are the lung and bone after lymph nodes. A newly defined type of occult DTC is consistent with metastatic disease without an identified primary malignancy in the thyroid gland after total resection. We present a patient with multiple lung metastases of occult DTC showing mild 18F-fluorodeoxyglucose (FDG) uptake and intense radioiodine uptake without a primary lesion in the thyroid gland.


Occult differentiated thyroid cancer Lung metastasis FDG PET/CT Radioiodine 


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© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Tevfik Fikret Çermik
    • 1
  • Nurhan Ergül
    • 1
  1. 1.University of Health Sciences, İstanbul Training and Research Hospital, Clinic of Nuclear MedicineIstanbulTurkey

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