Fused Stems (Fasciation)

[Jiminy Cricket]

Anyone else have any tomato plants with fused stems? I recently found out this is called fasciated growth or just fasciation. My plants look healthy and flower buds are just starting to appear so I'm not too concerned. As long as I stake the plants well, I guess they should be ok?

Also, I have 1 plant whose main stem has split off into 5 main stems, each stem shooting off at an angle so I cannot tell which one was the original main stem. Again, the plant is healthy enough so I am not concerned at the moment. Should I prune the plant or just keep the five upper stems?