Skull metastasis of follicular thyroid carcinoma: a rare case report

Follicular thyroid carcinoma is a malignant epithelial tumor arising in both eutopic thyroid gland and/or heterotopic thyroid tissue. Follicular cancer accounts for 5-15% of all thyroid cancers in iodine sufficient areas i.e. is the second commonest form of differentiated thyroid malignancy. It spreads via haematogenous routes. So it spreads to lungs and bones. In thyroid cancer only 2.5 % cases shows skull metastases. Here, presenting a 61 year old female with a swelling in the skull left frontotemporal region for 4 years duration with proptosis. She also had thyroid swelling of 20 years duration which is asymptomatic. Cytological confirmation was done to diagnose follicular carcinoma with skull bone metastasis. After total thyroidectomy external beam radiotherapy was given to skull metastases in view of threatened vision. Radioiodine therapy was given afterwards.