%0 Journal Article %A Gi Tae Kwon %A Min Sung Kwon %T Diagnostic challenge of rapidly progressing sporadic Creutzfeldt-Jakob disease %D 2019 %R 10.1136/bcr-2019-230535 %J BMJ Case Reports %P e230535 %V 12 %N 9 %X Antemortem assessment of sporadic Creutzfeldt-Jakob disease (sCJD) can be significantly hampered due to its rarity, low index of clinical suspicion and its non-specific clinical features. We present an atypical case of definitive sCJD. The patient died within 5 weeks of the disease onset. This unusually short duration of disease presented a significant diagnostic dilemma. The patient presented with 2-week history of sudden-onset cognitive decline, memory loss, aphasia and ataxia. MRI Diffusion-weighted sequences revealed cortical ribboning sign without cerebral atrophy. Protein 14-3-3 from cerebrospinal fluid (CSF) was detected, and postmortem brain autopsy confirmed the diagnosis of sCJD. This case underscores the importance of considering CJD as a potential diagnosis for rapidly progressive dementia. Serology tests, EEG, MRI and CSF study are invaluable diagnostic tools when assessing for sCJD. Appropriate use of those diagnostic tests, along with a detailed clinical examination, can successfully and promptly exclude other differential diagnoses and confirm sCJD. %U https://casereports.bmj.com/content/bmjcr/12/9/e230535.full.pdf