question_answer 24)

  Which of the following conditions is not linked to deficiency of thyroid hormone? (a) Cretinism                      (b) Goitre                            (c) Myxoedema                (d) Exophthalmia

Answer:

                (d) Exophthalmia, is a condition, that is not linked to deficiency of thyroid hormone, but to over secretion of thyroid hormone, but to over secretion of thyroid hormone. In this condition there is a bulging of the eye anteriorly out of the orbit. This is due to an increase in the amount of white blood cells (lymphocytes) in the eye and swelling due to excess accumulation of thyroid hormone, result the eyeballs being forced forward out of the eye sockets (orbits) whereas, cretinism, goitre and myxoedema are the diseases linked to thyroid deficiency.