Does neovascularity mean that a testicular lump is testicular cancer?

The term means. "new blood vessels". Not sure if this is read from an u/s report, but to answer you question, only a biopsy provides the critical tissue to determine if cancer or not, and if cancer what kind. If the testis is enlarged and this report, i'd get an alph-feto protein and HCG blood test on the way to the or.