Cutaneous metastases from follicular thyroid carcinoma: histology, immunohistology, and electron microscopy. A report of two cases.

Cutaneous metastases from thyroid carcinoma are extremely rare. We report 2 cases of skin metastases from a follicular thyroid carcinoma. A 53-year-old female patient underwent subtotal thyroidectomy because of the clinical suspicion of malignancy. Histological examination of the resected tissue did not clearly prove malignant features. Eight years later a cutaneous metastasis erupted next to the operation site at the neck. A 66-year-old female patient noticed a growing solitary skin nodule in the occipitoparietal region of her scalp 2 years before a follicular thyroid carcinoma was detected.