The Office star Lucy Davis shares 'tiny' breast cancer symptom she nearly missedChilling Adventures of Sabrina star Lucy Davis has been diagnosed with stage 4 breast cancer, which she confirms is "incurable". She first noticed a "tiny" symptom she almost didn't get checked outView Image Lucy Davis shared the 'tiny' cancer symptom she almost missed (Image: Rich Fury via Getty Images)The Office star Lucy Davis has revealed the "really tiny" symptom she nearly "didn't get checked out" prior to her stage 4 breast cancer diagnosis. Really tiny. Symptoms of breast cancerThe NHS states symptoms of breast cancer in women may include:a lump, or swelling in your breast, chest or armpit. It adds: "Breast pain by itself is not usually a symptom of breast cancer."