Disorders: Ehlers-Danlos, Osteogenesis Imperfecta
Start with the big picture
EDS encompasses disorders caused by defects in collagen synthesis or processing, with features that vary by subtype. Classic EDS is associated with hyperextensible skin, joint hypermobility, and easy bruising; vascular EDS carries serious risks including arterial or organ rupture. OI results from defects in type I collagen and commonly presents with fractures after minimal trauma, blue sclerae, hearing loss, or dentinogenesis imperfecta. Its severity ranges from mild to perinatal lethal. Laboratory findings in OI are typically normal for calcium, phosphate, alkaline phosphatase, and parathyroid hormone, while imaging may show characteristic skeletal changes. The lesson also compares shared mechanisms and practical clues that help distinguish the conditions.
What you'll learn
- Describe the collagen defects and inheritance patterns associated with EDS and OI.
- Recognize major EDS subtypes and their characteristic clinical features.
- Summarize OI severity patterns, laboratory findings, and imaging features.
- Distinguish EDS from OI using characteristic clinical clues.
- Identify key management approaches described for OI.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
