An Open Label, Phase II Trial of Continuous Low-Irradiance Photodynamic Therapy (CLIPT) Using Verteporfin (Visudyne®) for the Treatment of Cutaneous Metastases of Breast Cancer

Inclusion Criteria: * Histologically or cytologically confirmed Stage IIIb or IV breast cancer with cutaneous metastases. Exclusion Criteria: * Participants receiving any medications or substances that are known to cause photosensitivity (e.g. tetracyclines, sulfonamides, phenothiazines, sulfonylurea hypoglycemic agents, thiazide diuretics, griseofulvin, fluoroquinolones, St. Johns' wort, amiodarone) are ineligible. * Participants who have received prior systemic therapy (chemotherapy or targeted therapy) within 7 days of Study Day 1 or those who have not recovered from clinically significant adverse events due to agents administered more than 7 days earlier. (continuation of the same regimen of HER-2 antibody targeted therapy agents, hormonal therapy and treatment with bisphosphonates or denosumab are permitted) * Participants who are receiving any other investigational agents during the proposed treatment cycle.