Notably, DLK1 is consistently re-expressed across a broad range of malignancies, with the highest prevalence observed in endocrine and neuroendocrine tumours, including adrenocortical carcinoma, phaeochromocytoma/paraganglioma, medullary thyroid carcinoma, and neuroblastoma. The gene discussed is DLK1; the disease is medullary thyroid gland carcinoma.