A method for evaluating treatment outcome in a patient having a genetic predisposition for a malignant neoplasm before clinical manifestation of the neoplasm can be seen radiographically. The method permits visualization of any tumor, whether located externally on a patients body or located internally in the body, and as small as 2 mm in diameter, using a biomarker. The method uses biomarkers conjugated with nanoparticles which include but are not limited to quantum dots, with the conjugated form collectively termed functionalized nanoparticles, that are heated under specified conditions to produce a photoacoustic signal that is then visualized to locate and/or treat the tumor.
