Blue discolouration of the skin can have a multitude of causes, including Mongolian spots, blue naevi, the naevi of Ito and Ota and metallic discolouration (1) or the use of drugs such as minocycline.
The discovery of black coloured deposits in the dermis excludes the diagnoses of Mongolian spots or blue naevi and the naevi of Ito and Ota, all of which are disorders of dermal melanocytes.
Pigmented naevi were the most common, with mongolian spots in 11.
Mongolian spots and naeveus fllammeus were more frequent in NBW neonates.
The prevalence of congenital melanocytic nevi in Asians and the Mongolian spots in non-European newborns highlights this positive association with geographical area of origin.
The most common site for mongolian spots was lower back (58.
The most common are cafe-au-lait spots - coffee-coloured marks found anywhere on the body - moles and bluish-grey Mongolian spots
Conditions that might be mistaken for abusive skin injuries include Mongolian spots
, coagulopathies, vasculitis, and rare connective tissue disorders such as Ehlers-Danlos syndrome.
Neonates, lanugo hair, Mongolian spots
, sebaceous hyperplasia, cutis marmorata, vernix caseosa, acrocyanosis, neonatal acne, erythema toixcum neonatorum, neonatal alopecia.
The most common dermatoses were Mongolian spots
1 Among different ethnic groups, over 90% of native American and people of African descent, about 80% of Asians, about 70% of Hispanics and fewer than 10% Caucasians have Mongolian spots
In contrast to the nevus of Ota, the mongolian spot
is present at birth and usually diminishes at about the age of 5-7 years.