the diffuse endocrine system , to which the so-called apud ( amine precursor uptake and decarboxylation ) cells do belong , gives rise to a group of tumours which may or not secrete amines and/or polypeptide hormones : carcinoids ( argentaffinomas , argentaffin or kultschitzky cell carcinomas ) .
C0014136
endocrine system
C0007095
carcinoids