Join of sql query

Hi,

I have this table looking like this:

stores
storeID int
storeName nvarchar
regionID int
storeAddress nvarchar
storePhone nvarchar
storeTypeID

The data stored in the database table could look like this:
storeID      storeName      regionID      storeAddress              storePhone  storeTypeID
1               VD                         -1              Stensätravägen 3B      08554455     5
110               Region Öst          1              Olavägen 3              08667894     2
111               Kolargatan          110      Kolargatan 2              08574123     1

I would like the output of my query to look like this:
storeID    storeName  Region          storeAddress  storePhone
111          Kolargatan   Region Öst   Kolargatan 2    08574123

Now the problem is how I can join the columns storeID and regionID so that I can show the region for the particular store. Also, if regionID is -1 as in  the case of the store with ID 1 then the Region column should be blank.

How can I achieve this?

Thanks for help!

Peter