Fahr氏病有關之動態性震顫：一個造成老年人常見症狀之罕見病因

Fahr's disease (FD) is a rare neurodegenerative disease characterized by bilateral symmetric basal ganglia calcification. Age of onset is typically in the fourth or fifth decade. A 70-year-old woman presented kinetic tremor of both hands for half a year. Imaging study demonstrated symmetric massive calcification of bilateral basal ganglia and cerebellum as well as calcified spots at left occipital and parietal lobes; no brain parenchymal abnormality was observed. She had neither traumatic history nor systemic disease, except hypertension. All blood examinations were within normal ranges. She was diagnosed with FD. Over the following year, she has regularly taken propanolol, and hand tremors were mitigated to a degree that no longer influence the patient in her daily life. The case indicates that an elderly patient's tremor may be attributable to FD. Computed tomography helps detect the existence of bilateral symmetric basal ganglia calcification, and FD should be differentiated from Fahr's syndrome.