Toronto Police have charged Marilyn Ely Reid, 46, of Newmarket, with criminal negligence causing bodily harm.

TORONTO - A buttocks injection gone horribly wrong has led to criminal charges against a Newmarket, Ont., woman, police say.

Police allege Marilyn Ely Reid, 46, who goes by "Elly" or "Ella," would advertise lip, muscle and buttock injections on the site pmmainjection.com and use e-mail to arrange meetings with clients in their homes or in hotels.

The site states "We create the perfection."

Some clients would pay "thousands of dollars" in cash-only deals for the services, Det. Louise Farrugia said Friday.

Police said Reid would use PMMA — polymethylmethacrylate — a very thick liquid gel also used to make acrylic glass.

On Aug. 26, a 28-year-old woman allegedly paid Reid for several injections of PMMA. She fell ill almost instantly, Farrugia said.

Three days later, the woman's condition worsened and she was rushed to hospital.

"She was treated for several days with antibiotics but the woman's condition continued to deteriorate and she received surgery" to remove the substance, Farrugia said.

Months after the botched butt injections, the woman still suffers from "debilitating injuries," Farrugia said, adding the woman can barely walk and can't sit. "She's expected to do better in the future."

Farrugia urged anyone interested in PMMA procedures to seek medical advice from a licensed practitioner.

Reid appeared in a Toronto courtroom Friday morning, charged with criminal negligence causing bodily harm.

Police say they believe there may be more victims.