There wasn't much left for a post-mortem," a hospital official told the news service.
Only the remains of her purse, along with a few scraps of clothing, betrayed her identity.
"How did she end up in the backyard of the ward where she was admitted? Why wasn't any information given to police after she went missing? And what did the authorities do to trace her? These are some of the aspects we are investigating," the police spokesman said.
It's not the first time dogs have attacked patients in Indian hospitals.
On January 7, dogs mutilated the body of a newborn child outside the Shahdol district hospital.
In December last year, rats reportedly defiled a corpse in Hamidia Hospital, Bhopal, while dogs ran off with the remains of a stillborn baby in Satna district.