1.   Janet has suffered various forms of ill health throughout most of her life, including asthma and a serious thyroid deficiency.

2.   There is a positive association between thyroid cancer and parity, and an association between breast cancer and thyroid deficiency has likewise been recognised clinically.

3.   It proved to be a complex case of severe thyroid deficiency aggravated by psychological problems.

4.   Thyroid deficiency, which can occur if radiation to the chest or neck damages the thyroid gland, can also be remedied with medication.

5.   In extreme cases, iodine deficiency can cause goiter and cretinism, a thyroid deficiency causing arrested mental and physical deformity.