ptsd Reopening Claim For Agent Orange

[jstone1950]

I was recently diagnosed with prostate cancer (Dec 10) after 4 biopsies beginning approximately 5 yrs ago. I'm also service-connected at 0% for residuals of hepititus and alpecia areaota. I served in Vietnam 69 - 70. I also applied for other disabilities including PTSD approximately in 1994 and was denied. I was compensated by the chemical company that sprayed ao during that time and applied to VA for residuals of ao such and was denied. I would like to know with this diagnosis if it can be used to reopen the initial claim. Thanks for your help in advance.