Shari Redstone, chair of Paramount Global, has been diagnosed with thyroid cancer, a spokesperson for Redstone confirmed Thursday.

Shari Redstone was diagnosed with thyroid cancer earlier this spring,” the spokesperson said in a statement ( via CBS News). “While it has been a challenging period, she is maintaining all professional and philanthropic activities throughout her treatment,

Shari Redstone, who for months has been leading the charge to merge Paramount with Skydance has, at the same time, been fighting another battle with thyroid cancer.