Epidermal growth factor, latrophilin and seven-transmembrane domain-containing 1 (ELTD1), an orphan G-protein-coupled receptor (GPCR) belonging to the adhesion GPCR family, has recently been identified as a potential cancer biomarker and a novel regulator of angiogenesis. In this mini-review, we present an overview of the current literature on ELTD1 and present bioinformatics data showing ELTD1's sequence conservation, its expression in cancer cell lines and its mutational frequency in human cancers. Additionally, we present sequence homology alignment results confirming ELTD1 to be a hybrid comprising motifs shared with individual members in both adhesion GPCR subfamilies 1 and 2. Finally, we discuss why tumour endothelial ELTD1 expression may confer a good prognosis yet still represent a therapeutic target.

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