Numerous fractures and severe bone deformity. Small stature with underdeveloped lungs. Collagen is improperly formed. Type III Bones fracture easily. Fractures often present at birth, and x-rays may reveal healed fractures that occurred before birth.
Sclera have a blue, purple, or gray tint.
Loose joints and poor muscle development in arms and legs. Barrel-shaped rib cage. Respiratory problems possible. Bone deformity, often severe. Brittle teeth possible.