Actress Shannen Doherty shaves head while battling cancer

We met her as "Brenda" on "90210," a trademark for actress Shannen Doherty has been her long flowing dark hair.

But Doherty is fighting breast cancer.

And she took to social media to document a vulnerable moment.

New pics on Instagram show her with a shaved head.

A hallmark look as people deal with chemotherapy.

Doherty was photographed with her mother and a friend.

She went public with her fight with cancer last August, after she filed a lawsuit.

She claims her manager did not pay her health insurance premiums.