Montell Jordan, the son of South L.A. who shot to fame in 1995 with the hit “This Is How We Do It,” says his prostate cancer has returned despite having a radical prostatectomy last year.

“We thought [the cancer] was all confined, isolated to the prostate,” he said Wednesday on “ Today .” “Apparently, that was not the case.”

Jordan said that after his nine-month follow-up exam and testing, doctors noticed a “tiny amount” of cancer cells in the prostate bed — the former site of the gland that was removed — and in some lymph nodes on the left side of his body. He is opting for proton radiation therapy to target the cancer and hormone blockers to reduce or eliminate production of testosterone, a hormone that the Mayo Clinic says is needed for most prostate cancer cells to grow.

The f

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