Hyperthyroidism is the overactivity of the thyroid gland resulting in excessive production of thyroid hormones.
Symptoms are of gradual onset.
Earliest signs may be emotional lability and motor hyperactivity; decline in school performance may also be noted.
Causes are autoimmune (Grave's disease), inappropriate stimulation by trophic factors, passive release of preformed thyroid hormone stores in response to infections, trauma, or other offensive factors inside the body, and extra-thyroidal sources.
Paternal exposure to selective serotonin reuptake inhibitors (SSRIs) prior to conception appears to be associated with a mildly increased risk of attention-deficit/hyperactivity disorder (ADHD) in offspring, according to a study.
Adolescent and young adult (AYA) patients treated for acute lymphoblastic leukaemia (ALL) were more likely to have an increased rate of toxicities in every organ system compared with children, according to a study presented at ASH 2017.