Your tomato plant will definitely continue to grow through side branches (suckers) that will grow upwards and take the place of the original main branch. You will need to support it, like you would the main branch.

Thanks swakyaby!

As long as there are nodes on the remaining part, it should grow lateral from those nodes.

And if you have the room, you can root the top and have a second plant of the same variety.

Betsy