RAB27A and alveolar soft part sarcoma: Upregulation of RAB27A, SYTL2, PDGFB, and VWF in human ASPS was observed when expression of these four genes was compared among five sarcoma types using microarray data deposited to Gene Expression Omnibus (https://www.ncbi.nlm.nih.gov/geo/) (Supplementary Fig. 4i).