HTR1D and cancer: Some very interesting insights can be drawn from these results: GPR84 (G protein-coupled receptor 84) is statistically significantly (log2FoldChange > 1, FDR < 0.05) upregulated in 14 out of the 23 cancer types, followed by HTR1D (5-hydroxytryptamine receptor 1D) in 11 and HTR3A (5-hydroxytryptamine receptor 3A), GABRG2 (gamma-aminobutyric acid type A receptor subunit gamma2), TRPM8 (transient receptor potential cation channel subfamily M member 8), HTR2C (5-hydroxytryptamine receptor 2C), and P2RY6 (P2Y purinoceptor 6) in 10.