head and neck cancer pathway thyroid cancer pathway 2009-10-28T01:33:42Z KEGG:05216 PW:0000698 Thyroid cancer refers to one of several types of malignant tumors of the thyroid gland of which papillary thyroid cancer is the most frequent, accounting for almost 80% of all cases. The other types include follicular, medullary and anaplastic. malignant neoplasm of thyroid gland pathway malignant tumor of thyroid gland pathway pathway thyroid neoplasm pathway vpetri endocrine gland cancer pathway