["It is unknown whether phenotypic expression of Hashimoto's thyroiditis (HT) might be conditioned by the association with Turner syndrome (TS).", 'To focus on the most recent pediatric studies concerning epidemiology and biochemical course of HT in TS girls.', 'The epidemiological peculiarities of TS-related HT in pediatric age were compared with those usually observed in non-TS girls with HT and results are summarized in Tables 1 and 2.'] Is phenotypic expression of Hashimoto 's thyroiditis absolutely atypical in girls with Turner syndrome?