Joan Rivers' daughter is suing the doctors who treated her mother before her death last year (14).

Melissa Rivers' lawyer insists no other family should have to go through what she did.

The late comedian stopped breathing during a routine procedure at Yorkville Endoscopy in New York last September (14). A medical examiner ruled she died of brain damage due to lack of oxygen.

More: Joan Rivers' Daughter To Sue NYC Medical Center | Contactmusic ...

TMZ: Joan Rivers -- Melissa Sues Clinic Over Mom's Death |