Discordance
<B>1.</B> The presence of any given condition such as HIV in only one member of a couple.
<B>2.</B> In genetics, the presence of a phenotype such as asthma in only one members of a twin pair.
<B>3.</B> In clinical care, lack of agreement between physician and patient.<BR>In all sense, disconcordance is as opposed to concordance.
From dis- + the Latin concordare, to agree = not to agree