“…Furthermore, previous reports describing painless subacute thyroiditis [23,24], including two `outbreaks' of cases [30,31], do not fully explain the etiology for the condition, except for a report by de Bruin et al [31] in which the patient exhibited significantly lower frequency of HLA-B35 but increased frequency of HLA-B15 with painless subacute thyroiditis compared with the painful forms. From a diagnostic standpoint, painless thyroidal destruction with definite inflammatory reactions is very difficult to distinguish from etiologies of other fevers of unknown origin such as infections, malignancy and collagen disease, which makes thorough systemic examinations necessary [12,23,24]. However, in our case and others [12,23], intense thyroid uptake of Ga-67 citrate provided the best evidence of the thyroid as the focus.…”