Baywatch star Nicole Eggert revealed she has had a second mastectomy, RadarOnline.com can report, as she continues to fight a rare form of breast cancer .

The former pin-up has been open with fans about her battle, chronicling the extreme lifestyle changes she has been forced to make. Article continues below advertisement

Eggert shared her update in an Instagram post . The 53-year-old snapped a selfie from the nose down while standing in front of a mirror in a black sports bra and white underwear.

"Had a mastectomy with reconstruction on Thursday. How was ur weekend?" she captioned the photo, adding the hashtags #breastcancer #breastcancerawarness #feelyourselfup and tagging @southcoastplasticsurgery.

Later in the day, she followed that up with an emotional post about re

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