THYROID GLAND - Angioinvasive follicular carcinoma

The specimen consists of a segment of tumour nodule removed from the thyroid gland. This is encapsulated and appears homogenous apart from two pale areas situated in the periphery. These contain a central focus of haemorrhage. Microscopy showed the tumour nodule to consist of multiple neoplastic thyroid follicles containing colloid. The tumour exhibited only mild nuclear pleomorphism, however there was evidence of angioinvasion in one area immediately adjacent to the tumour capsule.