Wendy Williams stepped out following a report of her alleged dementia and aphasia diagnosis -- and if you were hoping for a comment, forget it ... her lips were sealed!

The former talk show host was spotted leaving Nobu 57 in NYC over the weekend -- declining questions about the alleged test results but looking happy, healthy ... and, of course, fashion-forward. Gallery Launch Gallery Getty

Wendy was pure vibes in a sparkling glam outfit, cruising out of Nobu on her mobility scooter and handing cash to a guy asking for food -- clearly unfazed by recent reports of the diagnosis.

Still, it’s interesting -- People recently cited anonymous sources, claiming a series of medical exams confirm she has frontotemporal dementia and aphasia -- the same diagnosis she was given back in

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