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

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.

Shari Redstone, the media mogul who has been trying to sell Paramount in a politically fraught transaction, is undergoing treatment for cancer.