Instead she took on a position as a research assistant to Dr. Joe Hin Tjio, entering the field of oncological medical research. Little did she know that this convergence of events would propel her toward her greatest achievement in cancer research: proving that cancer was caused by mutations within chromosomes.
之後她跟隨 Dr.Tjio 進入腫瘤內科研究的領域，沒想到竟因緣際會地促成了她在癌症研究上最大的成就──證實癌症都是由染色體變異造成的。