What is Osgood Schlatter Syndrome?
Osgood Schlatter syndrome (OS) is a rare genetic disorder characterized by abnormal growth of bone and soft tissue within the limbs. People with OS are born without any bones or cartilage in their feet, hands, elbows, knees, hips and shoulders. They may have some extra skin on their head and neck but no other visible abnormalities.
The condition affects males and females equally. The average age at which someone develops the condition is between ages 15 and 30 years. There are two types of osgood-schlatter syndrome: Osgood Schlatter type Ia (OSI) and Osgood Schlatter type IIb (OSIIB).
Both forms cause similar problems in the body, however, one form is more common than the other.
In both cases, the bones grow abnormally fast and fail to fuse together properly. This results in rapid loss of bone mass leading to weakness and pain. The condition worsens over time until it reaches a point where the person cannot walk normally without assistance.
At this stage they are unable to do much except sit up or lie down due to muscle atrophy.
The first type of osgood-schlatter syndrome is known as type Ia. It accounts for 70% of cases and is considered the most common form. It typically starts during the teen or early adult years and is spontaneous in nature.
The cause is unknown but some have linked it to minor injuries that occur over a period of time. It is rare for people with this form to have any other complications besides knee pain.
The second type of osgood-schlatter syndrome is known as type IIb. It is a milder form that only accounts for 30% of cases. These cases start during childhood or the teenage years and are also spontaneous in nature.
Unlike the first form, children with this condition can have other complications. These can include breathing issues, mild scoliosis and spinal deformities such as curves.
What causes symptoms of osgood-schlatter syndrome?
The most obvious sign of osgood-schlatter syndrome is pain in the affected joints. The knee is usually the worst affected and this pain can be quite severe at times. It tends to get worse when you put weight on that leg such as when you are walking, running or jumping. Pain tends to be less severe when you are sitting or lying down. Some people with the condition may also develop knee swelling.
Sources & references used in this article:
Osgood schlatter syndrome by PA Gholve, DM Scher, S Khakharia… – Current opinion in …, 2007 – cdn.journals.lww.com
Prevalence and associated factors of Osgood-Schlatter syndrome in a population-based sample of Brazilian adolescents by GL de Lucena, C dos Santos Gomes… – The American journal …, 2011 – journals.sagepub.com
Treatment of Osgood–Schlatter disease: review of the literature by E Circi, Y Atalay, T Beyzadeoglu – Musculoskeletal Surgery, 2017 – Springer
Osgood-Schlatter disease by R Weiler, M Ingram, R Wolman – BMJ, 2011 – bmj.com
Osteochondritis dissecans and Osgood Schlatter disease in a family with Stickler syndrome by A Al Kaissi, K Klaushofer, F Grill – Pediatric …, 2009 – ped-rheum.biomedcentral.com
Osgood-Schlatter disease by PJ Maher, JS Ilgen – Case Reports, 2013 – casereports.bmj.com