VGLL2 (vestigial like family member 2) functions as a transcriptional co-activator that interacts with TEAD transcription factors through a conserved VxxHF domain 1. The protein contains both a Tondu motif and an Ω-loop in its TEAD-binding domain, which are critical for its interaction with TEADs and are conserved across vertebrates 2. VGLL2 plays important roles in normal skeletal muscle development and somitogenesis 3. However, VGLL2 is significantly involved in oncogenesis through recurrent gene fusions, particularly VGLL2-NCOA2 fusions found in pediatric spindle cell rhabdomyosarcoma 43. These fusion proteins act as potent activators of TEAD-dependent transcription independent of YAP/TAZ and engage epigenetic regulation by recruiting histone acetyltransferase EP300 4. VGLL2-NCOA2 fusions leverage developmental programs including ARF6 expression for tumorigenesis 3. Clinically, rhabdomyosarcomas harboring VGLL2 fusions represent a molecularly distinct subtype with favorable prognosis in infants 56. Additionally, VGLL2 variants near chromosome 6 show genetic interactions with maternal alcohol exposure in non-syndromic cleft lip/palate 7. The identification of VGLL2 fusions has potential therapeutic implications, as EP300 inhibition can suppress fusion-driven oncogenic transformation 4.