Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

Olivia Newton-John Announces Breast Cancer Has Returned

Singer Olivia Newton-John says she has been diagnosed with breast cancer that has returned and spread to her back.

The 68-year-old Australian entertainer postponed her June concert dates after learning that the back pain she’d been experiencing and attributed to sciatica was actually cancer, the Los Angeles Times reported.

“I decided on my direction of therapies after consultation with my doctors and natural therapists and the medical team at my Olivia Newton-John Cancer Wellness and Research Centre in Melbourne, Australia,” she said Tuesday in a statement on social media.

The treatments include a short course of photon radiation therapy in addition to “natural wellness therapies,” the statement said, the Times reported.

Newton-John was diagnosed with breast cancer in 1992 and underwent chemotherapy after breast surgery and reconstruction.