Exhibit 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We hereby consent to the use in this Registration Statement on Form S-1 of our
report dated September 7, 2006 relating to the financial statements of Light
Sciences Oncology, Inc. which appears in such Registration Statement. We also
consent to the references to us under the heading "Experts" in such Registration
Statement.


PRICEWATERHOUSECOOPERS LLP


/s/ PricewaterhouseCoopers LLP
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Seattle, Washington
September 7, 2006