Information and opinions on Prostate from Craftcpa at ProstateCommons.com. The HealthCentral Network, Inc. (www.HealthCentral.com) is one of the top health destinations on the Web, with more than 35 condition-specific, wellness and general health Web properties. http://www.healthcentral.com/prostate/c/65068 http://www.healthcentral.com/prostate/c/65068/rss self application/xml en-us 15 120 19 http://www.healthcentral.com/images/hc_logo_sm.gif http://www.healthcentral.com/prostate/c/65068 http://www.healthcentral.com/prostate/c/65068/16412/fathers-psa Wed, 14 Nov 2007 16:38:00 -0500 Craftcpa My 83 year old father has been undergoing Lupron therapy for the past year. When treatment started his PSA was 4200 and it had spread to his bones. His PSA dropped to 1.6, but on last testing it had started to increase to 2.1. Does anyone know margin of error on PSA test? How fast can he expect the PSA to increase now that it has apparently started upward? http://www.healthcentral.com/prostate/c/65068/16412/fathers-psa