--- http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=924 2005 Malattie rare Segni e sintomi Acantosi nigricans
--- http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=1555 2004 true Acantosi nigricans Craniosinostosi Dermatosi del cuoio capelluto Anomalie della pelle Orecchio