"Please Feel My A$$":
In order of most frequent to least frequent, and in order from least aggressive to most aggressive:
Papillary carcinoma
Follicular carcinoma
Medullary thyroid carcinoma
Anaplastic carcinoma
In order of most frequent to least frequent, and in order from least aggressive to most aggressive:
Papillary carcinoma
Follicular carcinoma
Medullary thyroid carcinoma
Anaplastic carcinoma