Photodynamic Therapy System for Patients With Refractory/Unresponsive Solid Tumors

In this Phase I photodynamic therapy study, patients will undergo a standard CT scan to determine the suitability of the treatment. In those patients that qualify the entry criteria, a light delivery catheter will be directly inserted in the tumor through a minor surgical procedure. The patients will then be injected with the photosensitive drug, LS11. One hour following the drug injection, light energy will be delivered from the light delivery catheter for a period of 1-24 hours. The duration of the light treatment for a given patient may be based on various factors including when a given patient enters the study. Following the delivery of light energy, the light delivery catheter will be removed from the tumor. The insertion and removal of the catheter will be carried out under the guidance of CT scan. The patients will be asked to take precautions from external light exposure for a period of time. The patients will undergo CT scan and other tests on days 7, 14 and 42 to evaluate safety of the treatment, tumor cell death and treatment response. Blood samples will be taken at different time points to examine the clearance of the drug from the body.