珍珠和Oy-sters:快速可逆的痴呆

Clinical, Imaging, and Mental Status Examination Findings in a Patient With Vitamin B₁₂ Deficiency (A–D) Clinical and imaging findings at time of presentation. (A) Smooth and reddish tongue. (B) Knuckle hyperpigmentation (arrows). (C) T2-weighted and (D) fluid-attenuated inversion recovery axial images of brain show periventricular hyperintensities. (E–H) Clock-drawing test: the patient was asked to draw a clock and set the hands at 2:30 (E) at presentation, (F) on the 4th day of treatment, (G) at 2 months follow-up, and (H) at 2 years follow-up. (I, J, N, O) Copying of image given on left side (I, J) before treatment and (N, O) 2 years after treatment. Drawing to command is shown before treatment (K [daisy in flowerpot], L [house in perspective]) and (P, Q) after 2 years showing normal state. (M) Impaired calculation at presentation and (R) normal calculation at 2 years is shown.