Breast cancer is the presence of malignant breast nodule, mass or abscess.
Most common symptom of breast cancer is a new lump or mass in the
breast. The lump or mass is usually painless, hard & irregular but
it can also be tender, soft, rounded or painful.
Other signs & symptoms include breast pain or nipple pain, nipple
discharge, nipple retraction and presence of breast skin changes (eg
peau d' orange, nipple excoriation, scaling, inflammation, skin
tethering, ulceration, abscess).