ERBB4 and anaplastic large cell lymphoma: Aberrant ERBB4 transcripts in a subset of ALK-negative anaplastic large cell lymphoma (ALCL) are driven by reactivated intronic long terminal repeats (LTRs), highlighting how endogenous transposons can disrupt transcriptional regulation, destabilize the genome, and contribute to oncogenic transformation (Scarfò et al., 2016).