Intriguingly, most of DELs altered in only one cancer type have not been reported to be related to cancer yet, for example, MIR99AHG, the most down-regulated DEL (log2FC = −6.44, FDR = 1.23 × 10−27) in BLC, and LINC00968, a significantly down-regulated DEL (log2FC = −3.77, FDR = 1.58 × 10−49) in ADC. The gene discussed is MIR99AHG; the disease is AIDS dementia complex.