Silent thyroiditis 5025133 223689655 2008-07-05T07:53:52Z AnjaManix 5964318 '''Silent thyroiditis''', also known as '''painless thyroiditis''' or more specifically and scientifically as '''subacute lymphocytic thyroiditis''', is a member of the group of thyroiditis conditions known as [[resolving thyroiditis]]. == Symptoms/Signs == Silent thyroiditis features a small [[Goitre|goiter]] without tenderness and, like the other types of resolving thyroiditis, tends to have a phase of [[hyperthyroidism]] followed by a phase of [[hypothyroidism]] then a return to [[euthyroidism]]. The time span of each phase is not concrete, but the hypo- phase usually lasts 2-3 months. The symptoms are those of hyperthyroidism and hypothyroidism during these phases. During the hyperthyroidism phase, RAIU (Radioactive Iodine Uptake) is suppressed while during the hypothyroidism phase it is increased. Thyroid autoantibodies (anti-thyroglobulin, anti-thyroid peroxidase) may be present, but the extent of their role in silent thyroiditis is unknown. == Etiology == Silent thyroiditis is most likely [[autoimmune]]. [[Hashimoto's thyroiditis]] is also known as chronic lymphocytic thyroiditis and is, therefore, in the same "family" as silent thyroiditis. It seems that silent thyroiditis may be transient "hashitoxicosis," which is a hyperthyroidism phase before the usual hypothyroidism associated with Hashimoto's thyroiditis. Ingestion of large or minimal amounts of [[iodine]] bring a host of different conditions and usually is not associated with silent thyroiditis. [[Category:Thyroid disease]] [[it:Tiroidite silente]]