text: what is wilson's syndrome?   wilson's syndrome  if you have a body temperature of less than 98.6 f. and some of the following symptoms you probably have wilson's syndrome. this condition involves a disorder where the cells of the body are unable to convert the inactive thyroid hormone, t4, into the more active hormone, t3. wilson's syndrome itself does not alter the thyroid hormone tests. it may exist in association with true hypothyroidism, however. in these cases, thyroid tests may be abnormal but the usually prescribed thyroid hormones may not entirely solve the problem.  if you suspect that you have wilson's syndrome, take your temperature with an accurate glass/mercury thermometer orally 3 hours after getting up and every 3 hours times 3 for a couple of days. if your temperature averages a few 10ths of a degree below 98.6f., and you have several of the above symptoms, you have wilson's syndrome.