Abstract Introduction We presented an interesting endocrine cause of fever of unknown origin. Subacute thyroiditis is a form of self-limited inflammatory thyroid disorder. Characteristic features like painful goitre, raised erythrocyte sedimentation rate, low radioactive iodine uptake,evidence of giant cell thyroiditis on thyroid fine needle aspiration can help an early diagnostic and appropriate management. Clinical Case We presented an interesting endocrine case of fever of unknown origin. A 42-year-old male patient was transferred to our outpatient clinic in AL Manathira hospital for further evaluation of fever and left side of the neck pain radiated to the ear that had persisted for more than one month. The present case suggests that, when fever is of unknown origin, subacute thyroiditis should be considered, even if clinical symptoms of thyrotoxicosis are not present during the early phase. Conclusion Fever of unknown origin (FUO) is a diagnosis that requires a demanding workup from physicians before confirming a diagnosis. Endocrine disorders, such as subacute thyroiditis, rarely present with fever of unknown origin. Subacute thyroiditis can have a broad spectrum of clinical presentations including fever and biochemical thyrotoxicosis without overt signs or symptoms.Figure 1:Thyroid ultrasoundThyroid ultrasound showed inhomogeneous parenchyme and bilateral partly decrease in echogenicity and vascularity, tender on examination, features suggesting thyroiditis. No cervical lymphadenopathy was detected (figure1). Neck ultrasound showed improvement in echogenicity and vascularity (figure 2).
Alibrahimi et al. (Thu,) studied this question.