Several doctors have said it’s “inconceivable” that former President Joe Biden’s aggressive form of prostate cancer went undetected by his medical team — as first son Don Trump Jr. even questioned whether the health diagnosis was part of a “cover-up.”

The 82-year-old former president was diagnosed Friday after doctors found a “small nodule” on his prostate during a medical exam earlier this month — with the cancer cells having spread to the bone, his spokesman revealed Sunday.

His team said the cancer had been graded a Gleason score of 9, suggesting his form was among the most aggressive.

A handful of medical experts were quick to question how the former president could be diagnosed at such a late stage — especially given that prostate cancer can be detected early with routine bloodwork, which is recommended for men over the age of 50.

“It is inconceivable that this was not being followed before he left the Presidency,” Dr. Howard Formman said in a post on X.

“Gleason grade 9 would have had an elevated PSA level for some time before this diagnosis. And he must have had a PSA test numerous times before. This is odd,” he added. “I wish him well and hope he has an opportunity for maximizing his quality of life.”

Dr. Steven Quay flagged similar concerns, saying Biden’s type of cancer is the easiest to diagnose when it first starts and progresses.

“The PSA blood test shows the rate of cancer cell growth. For even with the most aggressive form, it is a 5-7 year journey without treatment before it becomes metastatic,” he said.

“Meaning, it would be malpractice for this patient to show up and be first diagnosed with metastatic disease in May 2025,” he continued.

“It is highly likely he was carrying a diagnosis of prostate cancer throughout his White House tenure and the American people were uninformed.”

Medical analyst Dr. Marc Siegel also weighed in, telling Fox News that it was surprising Biden’s illness was so aggressive given his high profile.

“I mean, he must have had the best possible care here. I’m a little taken aback that it’s this far advanced,” he said.

Urologist Dr. David Shusterman speculated that Biden could have known for some time.

“The fact that we just find it at a Gleason nine is just pretty much unheard of in this day and age of medicine,” Shusterman told “NewsNation Prime.”

“This is what I typically would see in a VA hospital, where a patient hasn’t had medical attention in 10 years, presents to an emergency room with bone pain, and then they find that it’s metastatic prostate cancer.”

Meanwhile, President Trump’s son Don Jr. went further in bluntly suggesting the news was hidden.

“What I want to know is how did Dr. Jill Biden miss stage five metastatic cancer or is this yet another coverup???” the first son wrote on Truth Social.

Biden’s team disclosed that the diagnosis came after the former commander-in-chief started having urinary symptoms.