A young woman with fever of unknown origin

Fever of unknown origin (FUO): de Quervain's subacute thyroiditis with highly elevated ferritin levels mimicking temporal arteritis (TA)

“…[3][4][5][11][12][13][14][15] In the case presented, a 55-year-old woman had historical findings that suggested TA (ie, bitemporal headaches and bilateral angle of the jaw pain). Nonspecific laboratory test results also were consistent with the diagnosis of TA (ie, a highly elevated ESR).…”

“…Other clues to de Quervain's subacute thyroiditis were her headaches and angle of jaw pain. [11][12][13][14][15] De Quervain's subacute thyroiditis rather than Hashimoto's thyroiditis is a rare cause of FUO (Table I). Subacute thyroiditis is a self-limiting thyroid disorder.…”

“…3,[7][8][9] Among the miscellaneous causes of FUO are endocrine disorders that may cause fever in a small group of patients. 4,5,[10][11][12][13][14][15] Adrenal insufficiency, pheochromocytomas, and hyperthyroidism are rare causes of FUO because clinical findings usually suggest the diagnosis. 8,10 In the past, etiocholanolone fevers were occasionally cited as potential causes of FUO, but this potential cause of FUO is no longer recognized in the FUO differential diagnosis.…”

“…8,10 A rare endocrine cause of FUO is subacute thyroiditis. 4,5,[11][12][13][14][15] Subacute thyroiditis is usually a fairly straightforward diagnosis. However, if a patient with subacute thyroiditis has a history and physical and nonspecific laboratory findings that suggest an alternate diagnosis, then subacute thyroiditis can be a difficult FUO diagnosis.…”

Tiroiditis subaguda: revisión a partir de un caso clínico

“…La amiloidosis tiroidea es una patología que puede cursar con clínica similar a la tiroiditis granulomatosa, aumento importante de la VSG, disminución en la captación gammagráfica y respuesta espectacular a los corticoides, pero en estos casos suele existir afectación sistémica de la amiloidosis también 15 . Existen fármacos antiarrítmicos ricos en yodo, como es la amiodarona, que pueden producir tirotoxicosis inducida por yodo (enfermedad de Jodbasedow) y con menor frecuencia tiroiditis.…”