Occult metastic follicular thyroid carcinoma masquerading as a soft tissue sarcoma of the gluteal region

Abstract

This is a case of an occult follicular thyroid carcinoma in a 61 year old civil servant presenting with bony metastasis to the left iliac bone twenty years after an initail subtotal thyroidectomy. There was a soft tissue mass with associated cup shaped lytic destruction of the thyroid gland appeared macroscopically within normal limits but histology confirmed follicular thyroid carcinoma.