None of you seem to have a clue what Synthol is. Synthol is just synthetic oil. Alot like Oil based testosterone that you inject. It dissipates after a few weeks.
IF this guy does inject synthol then it would of had to inject it just a few weeks prior to the competition otherwise(Like testosterone injections) it would of dissipated within a few weeks. Testosterone dissipates depending on the ester used(Cyponate is an ester for example). Synthol(Brand name Syntherol) simply causes oil to occupy a space in the muscle and expand it and within a few weeks it naturally dissipates leaving a open space for real muscle to grow,That's why powerlifters use Synthol.
This guys oddly shaped bicep may or may not be due to synthol. IF it is,It means he either 1.Injected it a few weeks prior to competiton where it did not have time to dissipate or 2.He has been injecting it incorrectly and it has caused scar tissue to build up in the muscle giving it an odd shape.