Hardware store-grade silicone used by unqualified practitioners for buttock and breast implants can dissolve in the body. Despite media reports of deaths and injuries, the incidence of illicit procedures may be rising. "We've been hearing about this," said American Society of Plastic Surgeons President Malcolm Roth. "There are 'pumping parties,' involving high-volume injections to fill up the face, lips, cheekbones, chin or breast. Often it's buttock enhancement and often it's not sterile." The ASPS is reminding patients to check and understand providers' credentials before seeking cosmetic procedures.