syndromic disease carbon baby syndrome https://rarediseases.info.nih.gov/diseases/1089/carbon-baby-syndrome MONDO:0022071 SCTID:238700008 universal acquired melanosis UMLS:C0406419 Carbon baby syndrome, also known as universal acquired melanosis, is a rare form of hyperpigmentation. The skin of affected infants progressively darkens over the first years of life in the absence of other symptoms. The cause of the condition is unknown. MEDGEN:98349