In clinical support, elevated expression of the copper export protein ATP7A (encoded by ATP7A) was significantly associated with a T cell-infiltrated tumor microenvironment in a wide range of solid human pediatric malignancies (p = 8.9e−05), and was also associated with the improved survival of patients with neuroblastoma (p = 7.4e−03) (Supp. The gene discussed is ATP7A; the disease is neoplasm.