sentences:  Knowing the relative expression levels of survivin in different tumour types may prove helpful as survivin-related therapy may be administered depending on the expression level and reliance of the tumour type on survivin for resistance to apoptosis.Survivin can be regarded as an oncogene as its aberrant overexpression in most cancer cells contributes to their resistance to apoptotic stimuli and chemotherapeutic therapies, thus contributing to their ongoing survival.Most human cancers have been found to have gains and losses of chromosomes that may be due to chromosomal instability (CIN).