Scalp metastasis detected incidentally on screening scintigraphy after I-131 therapy from metastatic follicular thyroid cancer

Among differentiated thyroid cancers, follicular cancer metastases occur more frequently than papillary carcinoma. cutaneous metastasis is rare and located most frequently in the region of the skalp. i-131 ablation / metastases treatment is performed in metastatic cases after total thyroidectomy. in this article, we present a 63-year-old woman with metastatic follicular thyroid cancer. on the 7th day after radioiodic treatment with i-131, whole-body scintigraphy showed nodular lesions in the scalp at the posterior cranium besides the mediastinel lymph node, lung and bone metastases. single foton emission tomography –computered tomography (spect-ct) was clearly defined the anatomic localization of the scalp lesion. follicular cancer metastasis was diagnosed via excisional biopsy.