A. Rickets is caused by a lack of vitamin D. A is wrong;

B. Endemic goiter is also called big neck disease. It is caused by insufficient synthesis of thyroid hormone due to lack of iodine in the diet. Caused by, B is wrong;

C. Dwarfism is caused by insufficient secretion of growth hormone in childhood, C is wrong;

D. Creatism is caused by thyroid hormone in childhood Caused by insufficient secretion, D is correct.

Therefore choose: D.