Intracorporeal transillumination of tissue using LED array

A device for in vivo transillumination of a tissue, comprising:

• a flexible elongate member comprising a channel formed between a proximal end and a distal end;
• a handle attached to the proximal end;
• a mounting surface immovably secured to the distal end of the elongate member, the mounting surface comprising an array of light emitting diodes (LEDs) configured for visualizing the LEDs for locating the mounting surface on one side of an in vivo tissue wall that separates a first volume within a human body from a second volume by inspection from an opposing side of the in vivo tissue wall, wherein the mounting surface on one side of the first side of the tissue wall is visible on the opposing side of the tissue wall;
• an LED power cord coupled to the distal end of the elongate member for supplying power from a power source to the array of LEDs;
• and
• a controller coupled to the LED power cord for controlling power to one or more LEDs in the array of LEDs.