Riverdale alum Lili Reinhart has been diagnosed with endometriosis. "Last week, I was officially diagnosed with endometriosis following laparoscopic surgery," Reinhart, 29, captioned a series of hospital pictures via Instagram on Thursday, December 11. "Last year, I saw a urogynecologist and was diagnosed with interstitial cystitis. I was told there was no cure - and no lasting relief - for my symptoms." According to Reinhart, she went to a hospital three times and visited "multiple urologists and gynecologists" to diagnose her symptoms and come up with a treatment plan.