For this purpose, they placed two types of samples in the CAM; 1–2 mm3 fragments from biopsies of NB patients and 1–2 mm3 fragments from biopsies obtained from xenografts derived from four cell lines (HTLA-230; GI-LI-N (MYCN-amplified); ACN; SH-SY5Y (MYCN-nonamplified)) injected into nude mice. The gene discussed is MYCN; the disease is neuroblastoma.