Anatomical variations can be seen in any part of the body and unless they are identified through imaging. during surgery. or on autopsy most of them will never be detected. Anatomical variations of the sciatic nerve in relation to the piriformis have been described for many years and so has possible implications these variations might play in certain pathologies. https://www.roneverhart.com/Milwaukee-2649-20-M18-Orbital-1-4-Sheet-Sander/