I would to use the normal small caps with the item in description in order to distinguish lower from upper case (e.g. LaTeX).
In particular:
\begin{description}
\item[I cAn't DiStiNguISH upPeR fROm LoWeR cASe] description1
\item[AlSo HeRe] description2
\end{description}
I would something like the normal small caps \textsc{YeS I LiKe It!}
I have seen this question but it doesn't help me.
Edit: I use the package classicthesis


enumitem, @lockstep's answer produces the default small caps. – Werner Dec 2 '11 at 19:56