Subsequent studies of a rarer phenotype, multiple naevus spilus‐type CMN, revealed different changes in NRAS [p.(Q61H), p.(G13R), p.(Q61L)].38, 39 Since then, further publications of single samples from patients with CMN have confirmed the predominance of NRAS mutations in large or giant CMN.40, 41. The gene discussed is NRAS; the disease is congenital mesoblastic nephroma.