I've read the stats out there for recurrences in Oral and Oropharyngeal Cancer, and others, as well as risk for secondary cancers due to treatments, especially IMRT radiation, which go up every year, and the the 2 and 5 year overall survival rates, but some stats are outdated, and usually don't include HPV status, which is a prognosis factor, age, health status, tumor grade, type of treatments, doctors experience, smoking, drinking, distant metastes, and any underlying health issues, which all factor in. The two biggest prognostic factors for Oral, Oropharyngeal cancer are nodal involvement, and tumor thickness, since most of these failures occur locoregionally, and not from distant Metastases, so controlling the nodes are important, and most recurrences occur the first two years. Some patients don't mind knowing the stats like myself, but some do not, and does them no good, and probably why doctors don't discuss it much, plus they have no crystal ball as to what will happen, and everyone is different how they respond, recover, and why some have recurrences while others don't. I've had cancer 5x in three years, which is more unusual than most, but was lucky that they were found soon enough to be treated, so far.