**Question:** Osteogenesis imperfecta (OI) may present similarly to child maltreatment. However, there are features of OI that may help differentiate the 2, including blue sclera and osteopenia. Which of the following is another distinguishing feature:

A. Short stature and delayed milestones (comparable to developmental delay in child maltreatment)
B. Dental enamel defects (similar to dental abnormalities in child maltreatment)
C. Joint hypermobility (similar to hypermobility in child maltreatment)
D. Hypersensitivity to pain (similar to exaggerated pain response in child maltreatment)

**Correct Answer:**

**Core Concept:** Osteogenesis imperfecta (OI) is a group of inherited connective tissue disorders characterized by fragile bones, resulting in repeated fractures and deformities. It can be confused with cases of suspected child maltreatment due to overlapping clinical features.

**Why the Correct Answer is Right:** Distinguishing features of OI include blue sclera and osteopenia, which are not typically present in suspected cases of child maltreatment.

**Why Each Wrong Option is Incorrect:**

A. Short stature and delayed milestones are common in both OI and child maltreatment. OI is a genetic disorder affecting bone health, while child maltreatment involves neglect or abuse.
B. Dental enamel defects may coexist in both OI and child maltreatment, but they are specific to OI and not a distinguishing feature for child maltreatment.
C. Joint hypermobility is more likely to be seen in child maltreatment cases due to reduced muscle mass and strength, whereas joint hypermobility in OI is attributed to soft connective tissue abnormalities.
D. Hypersensitivity to pain is common in both OI and child maltreatment cases. However, exaggerated pain response is a characteristic feature of child maltreatment, while hypersensitivity in OI is due to bone fragility and pain sensitivity.

**Clinical Pearl:** Osteogenesis imperfecta (OI) and suspected cases of child maltreatment share overlapping clinical features, making differentiation challenging. However, distinguishing features include blue sclera and osteopenia, joint hypermobility due to soft tissue abnormalities, and exaggerated pain response due to bone fragility in OI. In contrast, child maltreatment cases usually present with hypersensitivity to pain and delayed healing of fractures.