‘Sons of Anarchy’ Creator Rushed To Hospital … Bum Appendix

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The genius behind “Sons of Anarchy” was rushed off set and into an L.A. hospital where he lost some weight — in the form of an appendix — and then Instagrammed the gruesome photos.

TMZ has confirmed … Kurt Sutter went under the knife Monday morning after experiencing honest pain on the set of the hit FX show.

We’re told Sutter is resting comfortably.  It…