Entertainment TV Suzanne Somers' Official Cause of Death Revealed Nearly 2 Weeks After Actress Dies at 76 Somers, who was best known for her roles on 'Three's Company' and 'Step by Step', died on Sunday, Oct. 15 — one day before her 77th birthday By Stephanie Wenger Stephanie Wenger Stephanie Wenger is a TV Writer/Reporter at PEOPLE. She joined the brand in 2021 as a digital news writer, covering stories spanning across the site's verticals. She previously contributed E! Online, Hollywood Life and Oscar.com. People Editorial Guidelines and Esther Kang Esther Kang Esther Kang is a writer at PEOPLE. She has been working at PEOPLE since 2023 and has previously worked for publications like TMZ and TooFab. People Editorial Guidelines Updated on October 27, 2023 12:30PM EDT Suzanne Somers’ cause of death has been revealed. The Three's Company actress died at 5:30 a.m. on Sunday, Oct. 15 after her breast cancer spread throughout her body, PEOPLE confirms. According to a death certificate obtained by The Blast, "breast cancer with metastasis to the brain” was listed as Somers' immediate cause of death with a biopsy confirming the discovery. Though no autopsy was performed, the certificate also reportedly listed hypertension, or high blood pressure, and hydrocephalus as additional underlying conditions that led to her death. Per the American Association of Neurological Surgeons, hydrocephalus is a condition where "excess cerebrospinal fluid (CSF) builds up within the fluid-containing cavities or ventricles of the brain" and causes "harmful pressures on the tissues of the brain." Somers' death certificate indicated that the actress suffered from hydrocephalus for over a year. JB Lacroix/WireImage Three days after Somers' death, she was buried at Desert Memorial Park in Cathedral City during a ceremony handled by a funeral home in Palm Springs, California, The Blast reported, citing the death certificate. Actress Suzanne Somers visits Extra at Burbank Studios on February 19, 2020. Paul Archuleta/Getty Suzanne Somers, Three's Company and Step by Step Actress, Dead at 76 Earlier this month, Somers' publicist R. Couri Hay confirmed her death to PEOPLE. She was 76. “Suzanne Somers passed away peacefully at home in the early morning hours of October 15th. She survived an aggressive form of breast cancer for over 23 years,” Hay wrote in a statement to PEOPLE shared on behalf of the actress’ family. “Suzanne was surrounded by her loving husband Alan, her son Bruce, and her immediate family,” the statement continued. “Her family was gathered to celebrate her 77th birthday on October 16th. Instead, they will celebrate her extraordinary life, and want to thank her millions of fans and followers who loved her dearly.” Alan Hammel and Suzanne Somers attends Clive's Milestone Birthday Gala on April 6, 2022. Patrick McMullan/PMC via Getty Suzanne Somers’ Family Celebrates Her 77th Birthday the Day After Her Death The Step by Step actress had been very open about her health struggles over the years, including her 2000 breast cancer diagnosis. She also experienced several other forms of cancer throughout her life. "Saying the words publicly out loud — 'I have breast cancer' — rocked my soul," Somers told PEOPLE in 2001. When she received the initial diagnosis, she and husband Alan Hamel "were silent, hardly talking, in disbelief, like this can't be happening, wondering is this a little blip or the end of my life?" she recalled. Suzanne Somers. A Timeline of Suzanne Somers’ Struggle with Cancer In 2007, Somers told the Los Angeles Times that, after treating her cancer with radiation, a lumpectomy and alternative medicine, she was cancer-free. However, the actress revealed that her breast cancer had returned in a July 2023 Instagram post. Alongside a photo of herself and Hamel, 87, she wrote, "As you know, I had breast cancer two decades ago, and every now and then it pops up again, and I continue to bat it down. I have used the best alternative and conventional treatments to combat it.” “This is not new territory for me,” she continued. “I know how to put on my battle gear and I’m a fighter." Suzanne Somers and Alan Hamel visit Hallmark's "Home & Family" on December 15, 2017. David Livingston/Getty Suzanne Somers' Widower Recalls Kissing and 'Talking to Her' in Her Final Days: 'She Was Still with Us' (Exclusive) Following news of her death, Somers’ publicist shared with PEOPLE a poem that Hamel wrote for his wife, which he had given her a day before she died. Written in all caps, the poem read, in part: “LOVE. THERE IS NO VERSION OF THE WORD THAT IS APPLICABLE TO SUZANNE. THE CLOSEST VERSION IN WORDS ISN’T EVEN CLOSE. IT’S NOT EVEN A FRACTION OF A FRACTION OF A FRACTION." "55 YEARS TOGETHER, 46 MARRIED AND NOT EVEN ONE HOUR APART FOR 42 OF THOSE YEARS. EVEN THAT DOESN’T DO IT. EVEN GOING TO BED AT 6 O’CLOCK AND HOLDING HANDS WHILE WE SLEEP DOESN’T DO IT. STARING AT YOUR BEAUTIFUL FACE WHILE YOU SLEEP DOESN’T DO IT," he continued. "THERE ARE NO WORDS. THERE ARE NO ACTIONS. NO PROMISES. NO DECLARATIONS. WE ARE ONE. I AM IN LOVE WITH YOU, MY BEAUTIFUL SUZANNE, FOR ALL OF ETERNITY." Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. In addition to her husband, Somers’ former costars — including Patrick Duffy and Joy DeWitt — and her son Bruce also paid tribute to the actress after her death.