I was under the impression that modifiers such as gentleman or lady have been passe for at least a decade, as they imply class structure. As long as the remainder of one's behaviour toward the patient is respectful and consistent, regardless of position in society, all is good.
 It takes years of training and professionalism to compartmentalize one's response to unpleasant professional experiences vs those encountered at other times in life. In healthcare settings and in my personal experience, I have only experienced these unpleasant sights as part of the clinical picture and sought to improve the state of the patient, not considered the impact on my sensitivities.