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,

Ms. Redstone, who is trying to close the sale of her family’s Paramount media empire to Skydance, was diagnosed with thyroid cancer this spring.