\documentclass[12pt]{article}
\usepackage{bigdelim}
\usepackage{multirow}
\begin{document}

\def\arraystretch{1.1}
\begin{tabular}{ll}
\ldelim\{{6}{2.75cm}[some text hier]
 & the first case\\
 & the second case\\
 & the third case\\
 & the forth case\\
 & the forth case\\
 & ...
\end{tabular}

\end{document}