You can delete your topic:
<a href="http://twitter.com/janburse"><img src="tweet_key_small.png" align="right" height="143" width="143"></a>You are all invited to follow our new twitter account with raw timely information about what is cooking in our lab:
<a href="http://twitter.com/janburse">Jekejeke Prolog @janburse</a>
Since twitter messages are short we mainly post updates with links from our G+ stream or this website.
The deletion will delete all dependent comments.