Watch: Lili Reinhart Shares Endometriosis DiagnosisLili Reinhart is sharing insight into her health journey. After a recent laparoscopic surgery, the Riverdale star was officially diagnosed with endometriosis. The update, Lili shared, came after multiple hospital trips and doctor's appointments. "Last year, I saw a urogynecologist and was diagnosed with interstitial cystitis," the 29-year-old wrote on Instagram Dec. 11. "I was told there was no cure-and no lasting relief-for my symptoms." "Three hospital visits," her caption, posted alongside photos from her health journey, continued.