Capecitabine and Cyclophosphamide (XC) as Maintenance Therapy for Advanced Breast Cancer

This study looks at whether a two-drug oral combination — capecitabine (a chemotherapy tablet) and cyclophosphamide — can be used as maintenance therapy to keep advanced or metastatic breast cancer under control after a prior treatment has already stabilized the disease. Maintenance therapy aims to prolong the period of disease control without the need for more aggressive treatment. **You may be eligible if...** - You are a woman aged 18 or older - You have confirmed metastatic or recurrent breast cancer (including HER2-positive or triple-negative subtypes) - Your cancer responded to or was stabilized (partial response, complete response, or stable disease) by a prior treatment - You have at least one measurable tumor or bone-only disease on scans - Your overall health is good enough for treatment (ECOG 0–2) - Your organ function (blood, liver, kidneys) is adequate for chemotherapy - Your expected survival is at least 6 months **You may NOT be eligible if...** - You are pregnant or breastfeeding - Your cancer has spread to the brain (central nervous system metastases) Talk to your doctor to see if this trial is right for you.