Conversation so far:
How did Hattie McDaniel die?
Hattie McDaniel died of breast cancer at age 59.
How long was Hattie McDaniel sick?
Where did Hattie McDaniel die?
Hattie McDaniel's died in the hospital on the grounds of the Motion Picture House in Woodland Hills, California.
Who was with Hattie McDaniel when she died?
What happened to Hattie McDaniel's estate after she died?
The IRS claimed Hattie McDaniel's estate owed more than $11,000 in taxes. In the end, the probate court ordered all of her property, including her Oscar, sold to pay off creditors.

Question: What treatments did she do for her breast cancer?
Self-contained rewrite: What treatments did Hattie McDaniels do for her breast cancer?