Teen is knifed by woman in subway

A WOMAN stabbed a teenager in his stomach on a Penn Station subway platform Sunday — then hopped into a subway car and disappeared, cops said.

The 18-year-old victim knew his attacker, a woman in her 20s, according to cops.

The two were standing on the uptown train platform just before 6:30 p.m., cops said, when she jabbed something sharp into his stomach, then boarded a northbound No. 2 and escaped, police said.

Medics took the teen to Bellevue Hospital with a nonlifethreatening wound.

The attack left blood spattered on the platform near three bags, a jacket and dice.

“There was a lot of people standing over there, and then you heard them all screaming and yelling,” said a homeless man sitting across from the platform.

He didn’t see the stabbing itself, “but it looked like a lot of people were fighting,” said the man, who did not give his name.

Terrence Cullen Mayor de Blasio is an 11th cousin five times removed of Robert Van Wyck (left), a Tammany Hall Democrat who served as mayor from 1898 to 1901 and is namesake of the Van Wyck Expressway (below) in Queens.