EX-23.1 7 v19513a5exv23w1.txt EXHIBIT 23.1 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 ------------------------------ Seattle, Washington September 7, 2006