thus , scn do not result from tangentially cut thyroid follicles ( absence of staining for thyroglobulin and thyroxin ) , nor from a squamous metaplastic process ( absence of staining for high molecular weight keratin ) , but instead they are formed by c-cells because they showed calcitonin immunoreactivity , and neurosecretory granules .
C0229577
thyroid follicles
C0229579
c-cells