The production of calcitonin is exclusive to the parafollicular
cells (C cells) of the thyroid.
* Calcitonin (which is produced by the parafollicular
(or C) cells of the thyroid, has the opposite effect on blood calcium levels as PTH.
region there were rarely CD30 positive active lymphoid cells, CD15 was negative, obvious capillary vessel network proliferation was determined with CD31 and CD34, evident increase in mast cells was determined with CD117 and mast cell tryptase, IgE positive plasma cells in germinal centers were defined and all those findings were compatible with the diagnosis of Kimura lymphadenopathy (Figure 1).
Procalcitonin, which is a peptide procursor of calcitonin, is produced by parafollicular
C cells of the thyroid gland and is involed in calcium homeostasis.
It has two endocrine functions: secretion of thyroid hormones namely thyroxine ([T.sub.4]) and triiodothyronine ([T.sub.3]) from follicular cells and calcitonin from parafollicular
or C cells.
The immunohistochemical demonstration of parafollicular
cells and evaluation of calcium-phosphate balance in patients with thyroid hemiagenesis.
The thyroid gland is a bilobar gland composed of two endocrine cells, namely, the thyroid follicular cells (TFCs) that produce the thyroid hormones T3 and T4 and the parafollicular
cells that secrete calcitonin.
In GF mice, the lymph nodes and spleens are abnormally developed, with decreased numbers of B and T cells in the germinal centers and parafollicular
(1) C cells are located between the follicular epithelial cells and their basement membranes and, hence, are also referred to as parafollicular
cells, a term first coined by Jose Fernandez Nonidez.
Five pairs of pharyngeal pouches lined by the endoderm give rise to the middle ear cavity, auditory tube, tympanic membrane (first one), palatine tonsils (second one), thymus and inferior parathyroid glands (third one), superior parathyroid glands (fourth one) and finally, parafollicular
cells of the thyroid gland (fifth one).
These are follicular cells and parafollicular
The RET gene is a proto-oncogene that is highly expressed in parafollicular