BIRC2 and head and neck squamous cell carcinoma: A study of The Cancer Genome Atlas (TCGA) data on head and neck squamous cellular carcinoma (HNSCC) also highlights the co-amplification of 11q13 (including the genes CCND1, FADD and CTTN) and 11q22 (including the genes BIRC2 and YAP1) as a common occurrence in HPV-negative HNSCC8.