Importance

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Abstract

Methods are provided for in vivo detection of diseased tissue in a subject, such as tumor tissue located in a body opening, by administering to the subject a biologically compatible fluorescing targeting construct that binds to or is specifically taken up by the diseased tissue. The observer directly views fluorescence emanating from the fluorescing targeting construct bound to or taken up by the diseased tissue upon irradiation of the targeting construct with excitation light having at least one wavelength in the range from 401 nm to about 495 nm, but preferably lacking light having a wavelength above about 500 nm, so as to determine the location and/or surface area of the diseased tissue in the subject. Since excitation wavelength does not penetrate through tissue, as is the practice in near IR diagnostics, the diseased or abnormal tissue is exposed to the excitation light either surgically or by means of an endoscopic device. Preferably a filter is used to filter out any wavelengths in the excitation light greater than about 500 nm.

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First Claim