Violent myoclonus after cardiac arrest, yet the brain imaging looked unremarkable A man in his 20s had severe, nonstop myoclonic jerks after two cardiac arrests, but scans and EEG did not show the brain damage usually expected. BMJ case reports, 2026 Presumed glaucoma was actually a steroid-dependent optic nerve inflammation A woman's years of eye pain and vision loss were labeled migraine, then glaucoma, until the pattern of damage pointed to an inflamed optic nerve. BMJ case reports, 2026 A teen's belief that strangers were one person in disguise traced to Moyamoya disease An adolescent with Moyamoya disease developed sudden psychosis, including Fregoli syndrome, and recovered within a month of cerebral revascularisation surgery. BMJ case reports, 2026 An insulinoma hid behind fainting, odd behavior and weight gain A 62-year-old woman's fainting spells and behavior changes were traced to a pancreatic tumor that a CT scan missed; she remained well 13 years after surgery. Journal of the ASEAN Federation of Endocrine Societies, 2026 A liver tumour hid behind a muscle disease that standard tests missed A man in his 70s with liver cancer developed dropped head syndrome. His muscle disease improved after surgery alone, with no immunosuppressive treatment. BMJ case reports, 2026 A mid-60s woman's eye-movement and vision loss traced to tuberculosis meningitis In the midwestern USA, a woman's orbital apex syndrome turned out to be tuberculosis meningitis, found only on dural biopsy. BMJ case reports, 2026 A 'polymyalgia' in a man in his 70s turned out to be melanoma from a toe lesion Shoulder and hip pain suggested polymyalgia rheumatica, but a very high creatine kinase led to dermatomyositis, lymph node melanoma, and finally a toe lesion once blamed on trauma. BMJ case reports, 2026 A young woman's unexplained stroke traced to a lung vascular malformation A woman in her 40s with no known risk factors had a thalamic stroke, and the cause turned out to be abnormal connections between her pulmonary arteries and veins. BMJ case reports, 2026 A brief digital test flagged the amyloid-positive adults at highest decline risk Among cognitively normal people with amyloid, a short self-administered digital test singled out an 18% subgroup with nearly triple the risk of cognitive decline. Alzheimer's & dementia : the journal of the Alzheimer's Association, 2026