Sicilian black e5

Sicilian Defence but instead of open or Classical, black plays e5. Thoughts?

The Knight should go to b5, hence the reason that you normally see ...a6 played before ...e5, such as in the Najdorf or O'Kelly

Or better still, white plays Bb5+.  Then, however black blocks, white will be able to establish the knight on f5.  (A g6 fianchetto, kicking the knight, will make little sense with e5 played, and in any event, the knight can just retreat to e3 and white will completely dominate d5.)

Its not so simple to get an advantage for white.

For more information, have a look on SOS 12 chapter 16 written by Igor Glek...

However, black plays Nf6 first : 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 and now 5...e5?! (or maybe !?)

My instinct would be to play  Bb5+.