Woman's puzzling decline turns out to be cobalt poisoning from hip replacement

A woman's mysterious health decline turned out to be cobalt poisoning from her hip replacement, reports Ars Technica. When doctors examined her implant, they found grey fluid and dead tissue inside the joint—the metal had corroded and leaked cobalt into her bloodstream. The case is a rare but serious reminder that metal prosthetics, while durable, can deteriorate inside the body. Though her implant was successfully removed, it underscores why patients with metal implants need ongoing medical monitoring.

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