Studies showed that SNP rs2151280 in lncRNA ANRIL was significantly associated with higher number of plexiform neurofibromas (PNFs) in neurofibromatosis type 1 (NF1) patients, which suggests SNP rs2151280 in lncRNA ANRIL is a potential biomarker for PNF susceptibility [69]. The gene discussed is CDKN2B-AS1; the disease is plexiform neurofibroma.