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But confirming the deficiency requires a spinal tap, which can be painful.—Jon Hamilton, NPR, 22 Jan. 2026 First the femoral artery line, next the catheter, then the many cannulas, and finally the spinal tap.—David Freyne, Time, 7 Dec. 2025 For Gibson, participation meant undergoing a tau PET scan to detect protein buildup in her brain, cognitive testing, blood work and that spinal tap.—Barbara Bry, San Diego Union-Tribune, 26 Oct. 2025 But until recently, confirming or excluding an Alzheimer’s diagnosis would require a referral to a neurologist and possibly a spinal tap or PET scan.—Tom Gavin, EverydayHealth.com, 20 Oct. 2025 See All Example Sentences for spinal tap