Universal acquired melanosis in siblings.

Generalized pigmentation in a child may be seen in a variety of disorders which can be clinically differentiated. Accuracy of diagnosis can be increased by classifications based on both clinical and histological findings. The authors report a case of siblings in whom hyperpigmentation started at age of about 6 mo and was progressing. Histology of skin revealed shortening and blunting of rete ridges with presence of melanocytes in stratum basal layer. This is a rare type of hypermelanosis and termed as universal acquired melanosis or carbon baby syndrome. This is a rare presentation and first case report in siblings.