NCIt definition : An encapsulated or well-circumscribed thyroid gland tumor composed of well-differentiated
follicular cells with well-developed or partially developed nuclear features of papillary
thyroid carcinoma and with questionable capsular or vascular invasion. This is a tumor
indeterminate between follicular adenoma and follicular carcinoma. Tumors in which
vascular invasion has been excluded by all means are called non-invasive follicular
thyroid neoplasms with papillary-like nuclear features. (WHO);
Neoplastic status : Uncertain Malignant Potential;