Father just diagnosed with differentiated keratinized squamous cell carcinoma in his prostate. can you explain what this is, treatment & expectancy?

This ? Is an office?: In general, squamous cell cancer is common, and without knowing how large the tumor is or if it has spread (which seems unlikely) it's impossible to comment on his case specifically in terms of treatment and prognosis. In general prostatic CA is very treatable. This is exactly the question you should ask your fathers oncologist. If you want to read more I suggest sites like mayoclinic.org

An uncommon problem.: Squamous cell carcinoma (SCC) is a very rare form of prostate cancer, less than 1%. Because it is so rare, I recommend having the pathology reviewed at a specialized lab such as at Johns Hopkins or the Mayo clinic. If it is confirmed as SCC, treatment can vary, from surgery, to radiation, to chemotherapy. I'd seek help from a center that specializes in prostate cancer.