A 12-year-old Bronx girl cops say was stabbed by her stepfather survived risky emergency surgery to remove a screw he then hammered up her nose into her brain — and her arrested attacker has attempted suicide, the Daily News has learned.

“It’s pretty much a miracle she made it through,” a law enforcement source said of the girl’s surgery.

The explosion of violence began about 11:15 p.m. last Wednesday during a clash inside the family’s sixth-floor apartment on E. 173rd St. near West Farms Road in Crotona Park East, just across the street from Starlight Park , officials said.

Suspect Joshua Burnside had just moved into the apartment a few weeks ago with his stepdaughter, his 5-year-old son and 2-year-old daughter and his 31-year-old ex-wife, neighbors said. The ex-wife is the mother

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