Atypical MEN type 2B associated with two germline RET mutations on the same allele not involving codon 918. - Menko,F.H.; van der Luijt,R.B.; de Valk,I.A.; Toorians,A.W.; Sepers,J.M.; van Diest,P.J.; Lips,C.J. (J Clin Endocrinol Metab, 2002)