MS4A12 and adenoma: The hCellMarkerPlex assay does not discriminate between the long (NM_017716.2) and short (NM_00164470.1) variants of MS4A12. Further validation of MS4A12 gene expression was conducted using SYBR real-time PCR with primer assays specific for the long (NM_017716.2) and short (NM_00164470.1) MS4A12 variants in a subset (n = 6) of matched normal, adenoma and carcinoma colon patient biopsy samples.