Bone Disorders

Overview of Osteogenesis Imperfecta Osteogenesis imperfecta (OI) is a genetic disorder of connective tissues caused by an abnormality in the synthesis or processing of type I collagen (the protein that is responsible for bone structure). It is also called brittle bone disease. It is characterized by an increased susceptibility to …

Definition Piriformis Syndrome is a disorder caused when the piriformis muscle compresses the sciatic nerve. The resulting pain, tingling, and numbness in the buttocks may be mistaken for sciatica, because the pain is along the path of the sciatic nerve. The piriformis muscle flexes with almost every motion of our …

Definition Sacroiliitis is a condition in which the sacroiliac (SI) joint – the large joint located between the sacrum (the tailbone) and the ilium (the pelvis) becomes inflamed or disrupted, and causes pain. There are two sacroiliac joints, one on the right side and one on the left, and they …

Definition Kniest dysplasia is collagenopathy collagen II affecting bone growth and is characterized by short stature (dwarfism), other skeletal abnormalities, and hearing and vision problems. The latter are mostly myopia, vitreous degeneration, and retinal detachment. Skeletal features may include kyphoscoliosis, platyspondyly, dumbbell-shaped bones in the arms and legs, long, gnarled …

What Is Dactylitis Psoriatic Arthritis? Dactylitis is the clinical name for when your fingers and toes are swollen, tender, warm, and inflamed due to a psoriatic arthritis (PsA) flare-up or an associated condition. The name comes from the Greek word for finger (“dactylos”). With dactylitis, your fingers can become so …

Definition Osteoid osteomas is a type of bone tumor. It is not cancer (benign). It remains in the same place it starts. It will not spread to other bones or parts of your body. The center of an osteoid osteoma is the nidus. It consists of growing tumor cells, blood …

What is Irritable Hip? All the freely movable joints of the body have a lubricating lining called the synovial membrane. Irritable hip occurs when the membrane becomes inflamed for a short period of time (otherwise known as ‘transient synovitis’). The inflammation causes pain. The synovial membrane produces more than its …

Definition Coccydynia is pain in or around the area of the coccyx, more commonly known as the tailbone. The coccyx is the last bone at the base of the spine. Injury or strain to the surrounding ligaments and muscles may cause this pain and discomfort, which is most often felt …