Kelley Mack cause of death: What is glioma of the central nervous system? All on Chicago Med star's health issues
Kelley Mack, actor famous for her roles in ‘The Walking Dead’, ‘9-1-1’ and ‘Chicago Med’, died last week, her family confirmed on Tuesday
Kelley Mack, actor famous for her roles in ‘The Walking Dead’, ‘9-1-1’ and ‘Chicago Med’, died last week, her family confirmed on Tuesday. She was 33 years old. It is reported that she passed away in her hometown of Cincinnati after a battle with glioma of the central nervous system.

Mack graduated from Hinsdale Central High School in 2010 and went on to earn a bachelor’s degree in cinematography from Chapman University’s Dodge College of Film in 2014.
Her interest in performing began after receiving a mini video camera as a birthday gift, which led to appearances in commercials as a child actor. She later won an acting award from NYU’s Tisch School of the Arts for her debut performance in The Elephant Garden, a film that earned the Student Visionary Award at the 2008 Tribeca Film Festival.
She was best known for her television roles, including Addy in Season 9 of The Walking Dead, Penelope Jacobs in Season 8 of Chicago Med, and appearances on FOX’s 9-1-1. Her film credits include Alice in Broadcast Signal Intrusion, Wilda in Delicate Arch, and Ricky in the upcoming Universal.
Beyond acting, Kelley Mack was also a screenwriter, collaborating with her mother, Kristen Klebenow, on multiple feature-length scripts. Among their projects was On The Black, a 1950s-era college baseball story inspired by her maternal grandparents’ time at Ohio University.
She is survived by her parents, Kristen and Lindsay Klebenow; sister Kathryn; brother Parker; and grandparents Lois and Larry Klebenow.
What is glioma of the central nervous system?
According to the Cleveland Clinic, a glioma ‘is a tumor that forms when glial cells grow out of control. Normally, these cells support nerves and help your central nervous system work. Gliomas usually grow in the brain, but can also form in the spinal cord’.
“Gliomas are malignant (cancerous), but some can be very slow growing. They’re primary brain tumors, meaning they originate in the brain tissue,” the website further states.
ABOUT THE AUTHORYash Nitish BajajYash Bajaj is a Chief Content Producer with a strong foundation in US coverage, digital strategy, and audience-focused storytelling. As part of the US Desk at Hindustan Times, he covers a wide range of topics - from American politics to sports (NFL, NBA, derbies, MLB and more). Before joining Hindustan Times, Yash served as Deputy News Editor at Times Now, where he oversaw international coverage and led a team of six. In this role, he significantly expanded global traffic through strategic planning, SEO-driven content execution, and meticulous trend tracking across platforms. He is experienced in managing high-pressure breaking-news shifts, coordinating live coverage, and building newsroom systems that improve speed, accuracy, and reach. Prior to Times Now, Yash held a position at Opoyi, where he headed the Sports and US news team. He developed broad editorial strategies, guided reporters across multiple beats, and played a key role in recruiting and training new talent. His responsibilities also extended to social media management and experimenting with innovative content formats. A passionate NFL fan, Yash is a die-hard supporter of the Cincinnati Bengals and has followed Joe Burrow closely since his college days at LSU. Whether breaking down top players' latest performance, analyzing team performances, or tracking roster moves, he brings the same dedication and sharp storytelling to his sports coverage as he does to American politics and breaking news. When he’s not writing, Yash can often be found watching games or debating the latest NFL storylines with fellow fans. Yash holds a Bachelor of Mass Media (Journalism) from HR College, Mumbai University. His interests extend well beyond the newsroom: he is an enthusiastic explorer of AI tools, a movie buff with an ever-growing watchlist, and someone who enjoys unraveling conspiracy theories for fun.Read More

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