Image courtesy of marin at FreeDigitalPhotos.net HPV oral cancer is an increasingly common cancer afflicting heterosexual individuals. The main way of diagnosing is by biopsy after an abnormal finding on oral examination . The main way of determining whether the cancer has come back after treatment is also by regular oral examinations. However, Johns Hopkins researchers may have developed a "spit" test that can detect whether oral cancer may have recurred after treatment befor…