Osteogenesis imperfecta is best described as which of the following?

• A. Genetic disease with multiple fractures and short stature; routine labs are usually within reference ranges
• B. Nutritional bone disease with calcium deficiency and abnormal labs
• C. Autoimmune bone disease with elevated inflammatory markers
• D. Infectious bone disease with leukocytosis

Answer: (C)

Osteogenesis imperfecta is a genetic disorder of connective tissue caused by defects in type I collagen, leading to bone fragility and fractures with minimal trauma. Because the underlying problem is genetic and structural, routine laboratory tests are typically normal. This contrasts with nutritional bone disease, autoimmune bone diseases, or infectious bone diseases, where you would expect abnormal labs such as electrolyte or vitamin deficiencies, inflammatory markers, or leukocytosis, respectively.

So the description that fits best is a genetic disease with multiple fractures and short stature while maintaining normal routine labs. Remember that other features of OI can include blue sclerae and dentinogenesis imperfecta, and management often involves fracture care, physical therapy, and therapies to improve bone density.