medullary carcinoma of thyroid arises from ?
a- parafollicular cells
b- cells lining the acini
c- capsule of thyroid
d- stroma of the gland
answer : a . parafollicular cells .
a- parafollicular cells
b- cells lining the acini
c- capsule of thyroid
d- stroma of the gland
answer : a . parafollicular cells .