What is Follicular Cancer of the Thyroid?

Like papillary cancer, follicular cancer is a well-differentiated tumour. Follicular cancers have a poorer prognosis than papillary tumours and occur in an older age group. They spread by the blood stream and rarely spread to the lymph nodes of the neck. There are two types:

Widely Invasive Follicular Cancer:

This type of tumour is highly aggressive and needs to be treated with great care because there is a 50% mortality as compared to the minimally invasive tumour where there is only a 3% mortality. The separation of the two entities is crucial and emphasizes the need for a pathologist with a special interest in endocrine pathology.

Minimally Invasive Follicular Cancer:

This tumour has an excellent prognosis and as a result some surgeons, treat lesions of 3cms in diameter in women under 50 years old with limited surgery (lobectomy). 

Cytological slides of follicular cancer of the thyroid - click either to enlarge