Following her son Alexandre's heart surgery in the United States during his childhood, Princess Lilian became very interested in medicine, and, in particular, in cardiology, and founded a Cardiological Foundation which, through its work, has saved the lives of hundreds of people.
Setelah operasi jantung putranya, Pangeran Alexandre, di Amerika Serikat ketika masa kecilnya, Putri Lilian menjadi sangat tertarik dengan pengobatan, dan khususnya, dalam bidang kardiologi, dan mendirikan Yayasan Kardiologis yang, melalui pekerjaannya, telah menyelamatkan nyawa ratusan orang.