Clinical Explorative Optical Breast Investigations

This study is using a special optical (light-based) imaging device to examine breast tumors — both cancerous and benign — to better understand what these tumors look like under light-based analysis, which could one day improve how breast cancer is detected and monitored. **You may be eligible if...** - You have a single breast tumor (either cancerous or benign) larger than 1 cm confirmed by biopsy - You understand spoken and written Swedish **You may NOT be eligible if...** - You have had previous breast surgery - You have received neoadjuvant chemotherapy (treatment given before surgery) - You have skin burns on the chest area Talk to your doctor to see if this trial is right for you.