Jose Rosas, 56, a general practitioner, was found guilty yesterday of sexually assaulting three patients inside his Mission District office. The violations occurred from 2002 to 2007. Caring for mainly Spanish-speaking patients, Rosas, attempting to help women with head or back pain, told the women "a pelvic exam was necessary to diagnose their conditions and 'conducted the vaginal exams in an inappropriate and unprofessional manner by digitally penetrating the victim patients for prolonged periods of time.'" Scheduled for sentencing on July 21, Rosas could face probation to 18 years in the clink. His medical license, of course, has since been suspended.