Quickly regenerates his arm and shoulder

Just then, Cell emerged from the dust-cloud in a rage. His body was scored with black blast residue all over, making the extent of the damage done unclear. Yet just as he flew out, the Galic Flash slammed into his upper torso, right below his neck, and ripped straight through.

"RAAHHHH!" screamed the monster as he flipped end-over-end toward the ground, trailing a spray of purple blood. He slammed into the scorched, blackened earth with a tremendous crash, kicking up massive chunks of dirt.

"How do you like that, perfect failure!" shouted Vegeta. Cell stood up quickly, his face contorted with shock and pain. His shoulder and left arm had been completely blown away. He couldn't contemplate just how Vegeta had been able to injure him so severely.

"ERRH! Look at what you did to me—!"

Cell started to speak, but Vegeta plowed into him an instant later, smashing the monster's body with a blindingly rapid flurry of blows. Punches and kicks and knees rained down on Cell's green torso as the prince pushed himself to his utmost. He knew he didn't have long before Cell would form himself a new arm, so he battled all the harder.

But after only a few seconds, Cell's left arm regenerated explosively without warning even as he continued trying to block Vegeta's blows. Having not expected it to re-grow so soon, the prince was caught without time to adjust before the new arm slammed into him, sending him flying away.

- Bringer of Death Chapter 45