What's the most likely diagnosis for this infant? It has nothing to do with trauma. I'll post the correct answer in a couple of days!
Correct answer: Yes, these are mongolian blue spots. It presents with blue / dark macular discoloration at the base of the spine and on the buttocks; they occasionally occur on the legs and other parts of the body. Usually but not invariably in Afro-Caribbean or Asian infants. They fade slowly over the first few years. They're of no significance unless misdiagnosed as bruises.