OI meaning in Medical ?

Answer: What is Osteogenesis Imperfecta mean?

Osteogenesis imperfecta (IPA: ; OI), colloquially known as brittle bone disease, is a group of genetic disorders that all result in bone that breaks easily.: 85 The range of symptoms—on the skeleton as well as on the body's other organs—may be mild to severe.: 1512 Symptoms found in various types of OI include whites of the eye (sclerae) that are blue instead, short stature, loose joints, hearing loss, breathing problems and problems with the teeth (dentinogenesis imperfecta). Potentially life-threatening complications, all of which become more common in more severe OI, include: tearing (dissection) of the major arteries, such as the aorta;: 333 pulmonary insufficiency secondary to distortion of the ribcage;: 335–341 and basilar invagination.: 106–107 

The underlying mechanism is usually a problem with connective tissue due to a lack of, or poorly formed, type I collagen.: 1513 In more than 90% of cases, OI occurs due to mutations in the COL1A1 or COL1A2 genes. These mutations may be inherited from a person's parents in an autosomal dominant manner but may also occur spontaneously (de novo). There are four clinically defined types: type I, the least severe; type IV, moderately severe; type III, severe and progressively deforming; and type II, perinatally lethal. As of September 2021, 19 different genes are known to cause the 21 documented genetically defined types of OI, many of which are extremely rare and have only been documented in a few individuals. Diagnosis is often based on symptoms and may be confirmed by collagen biopsy or DNA sequencing.

Although there is no cure, most cases of OI do not have a major effect on life expectancy,: 461 death during childhood from it is rare, and many adults with OI can achieve a significant agree of autonomy despite disability. Maintaining a healthy lifestyle by exercising, eating a balanced diet sufficient in vitamin D and calcium, and avoiding smoking can help prevent fractures. Genetic counseling may be sought by those with OI to prevent their children from inheriting the disorder from them.: 101 Treatment may include acute care of broken bones, pain medication, physical therapy, mobility aids such as leg braces and wheelchairs, vitamin D supplementation, and, especially in childhood, rodding surgery. Rodding is an implantation of metal intramedullary rods along the long bones (such as the femur) in an attempt to strengthen them. Medical research also supports the use of medications of the bisphosphonate class, such as pamidronate, to increase bone density. Bisphosphonates are especially effective in children, however it is unclear if they either increase quality of life or decrease the rate of fracture incidence.

OI affects only about one in 15,000 to 20,000 people, making it a rare genetic disease. Outcomes depend on the genetic cause of the disorder (its type). Type I (the least severe) is the most common, with other types comprising a minority of cases. Moderate-to-severe OI primarily affects mobility; if rodding surgery is performed during childhood, some of those with more severe types of OI may gain the ability to walk. The condition has been described since ancient history. The Latinate term osteogenesis imperfecta was coined by Dutch anatomist Willem Vrolik in 1849; translated literally, it means "imperfect bone formation".: 683 

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