It’s a scary situation in New England for one member of the Patriots’ staff.

Mike Vrabel revealed on Friday that first-year defensive coordinator Terrell Williams has been diagnosed with prostate cancer.

“I unfortunately have to tell you Terrell Williams was determined to have prostate cancer and is in the process of treatment, meeting with specialists figuring out the best plan of attack,” the coach told reporters. “You know how much Terrell means to me personally and to the people on this football team… we want to send our regards and publicly let everyone know what he’s dealing with.

“When he’s ready to talk, he’ll talk on his behalf but I wanted to let you know that’s what was going on.”

Williams, who served on Vrabel’s Titans staff from 2018-23 and came to New England this offseason, missed OTAs and minicamp with an undisclosed medical issue, but was with the team during training camp.

The 51-year-old left practice on a cart Aug. 4 after being treated for dehydration.

He missed games against the Dolphins and Steelers in Weeks 2 and 3 after stepping away from the team on Sept. 10, with Zak Kuhr taking over defensive play-calling.

“We’ll continue as we have been with Zak Kuhr calling the defenses,” Vrabel said. “I think that went well. I think the communication through the week, [the] organization hasn’t missed a beat whatsoever. I think those guys are doing a great job over there.”

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Vrabel did add, however, that Williams’ absence will be on everyone’s minds.

“Our thoughts, our prayers – [Williams] knows, we talk all the time – but just that are with him, his family, been through a lot and we care about him,” he said.