A new study suggests that acanthosis nigricansādark, velvety patches of skin commonly seen on the neck or underarmsāmay be an early warning sign of kidney disease in people with type 2 diabetes. Researchers found that diabetic patients with moderate-to-severe acanthosis nigricans were more than four times as likely to have diabetic kidney disease compared with those without the condition. Because the skin change is easy to spot during a routine examination, it could serve as a simple, low-cost screening tool, especially in resource-limited settings. While it does not cause kidney disease, it may indicate underlying insulin resistance and the need for closer kidney health monitoring.
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