Background: Fever of unknown origin is quite common in everyday clinical practice, and the approach is challenging. Prolonged fever as the sole manifestation of craniopharyngioma has been rarely reported in literature. Objective: Herein, we report a case of adamantinomatous craniopharyngioma presented as fever of unknown origin in a 51-year-old woman, initially misdiagnosed as atypical subacute thyroiditis. Case presentation: During the work up, the patient complained about bitemporal hemianopsia. Thus, she underwent a pituitary Magnetic Resonance Imaging, which revealed a mixed mass originating from the pituitary stalk and compressing the optic chiasm. The mass was surgically excised, and the histology confirmed the diagnosis of adamantinomatous craniopharyngioma. The patient remained afebrile post-surgery. We hypothesize that the craniopharyngioma caused an abnormality of thermoregulatory mechanisms due to infiltration of the hypothalamus.
Key words: fever of unknown origin, craniopharyngioma, PET-CT, treatment
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