Milder osteogenesis imperfecta (OI). Note the blue sclera. Children with osteogenesis imperfecta or thrombocytopenia may be mistakenly thought to be child abuse victims. OI variants may be present even in the absence of blue sclerae or dental issues. Wormian bones on a skull x-ray are a strong indicator of OI. A blanching mark from pressure of a shoe or sock may be normal and may last 40 to 60 minutes in a fair-skinned child.