A Brooklyn hospital neglected to inform two loving sons that their mother was dead, insisting for 11 days after the elderly woman died that she’d been “discharged,” according to a lawsuit filed earlier this month.

Richard and Joseph Mannarino claim in the Brooklyn Supreme Court suit that New York Methodist Hospital in Park Slope had all the brothers’ contact information in case there were any developments in the treatment of their 78-year-old mother, Agatha, but failed to use it when she died on Dec. 9, 2007.

Richard Mannarino told The Post, “I don’t want this to happen to anyone else’s family, what I went through. I’m really angry.”

The one saving grace, Richard said, was that his mother’s body was still in the morgue, and hadn’t been shipped off to a potter’s field.

Lawyer Michael Collesano said the hospital was responsible, even if it didn’t cause the woman’s death.

A spokesman for the hospital declined to comment because the case was in litigation.