As an example, the marker genes for the invasive apocrine subtype of breast cancer acyl-CoA synthetase medium chain 1 (ACSM1) and hydroxyprostaglandin dehydrogenase (PGDH) exhibit strong differential correlation (DCglobp=8.0E-05 and p=0.0004; DClocd=0.26 and d=0.27), but they would not be detected in a differential expression analysis (p=0.21 and p=0.55 after Benjamini-Hochberg correction). The gene discussed is ACSM1; the disease is breast carcinoma.