OWL: OCOSH Classification/Bone Diseases/Osteochondritis/Osteochondritis Dissecans/OCD Knee Femur

Images Osteochondritis of the Knee Indian J Radiol Imaging

Singh et al — 2007-07-12 00:03:43 GMT

Singh S, Chowdhury V, Dixit R, Khera G. Images - osteochondritis dissecans of knee : MR Imaging. Indian J Radiol Imaging 2005;15:463-466
Illustrated case report

Juvenile Osteochondritis Dissecans of the Knee

El Rassi & Bowen — 2007-07-01 00:03:43 GMT

Authors - George El Rassi, MD Saint George University Hospital- Achrafieh-lebanon Lebanon
J. Richard Bowen, MD Alfred I. duPont Hospital for Children Wilmington, DE 19803-3607
The purposes of this chapter are to describe the etiology, classification, clinical manifestation, diagnosis and treatment of juvenile osteochondrtis dissecans of the knee.

Knee Osteochondritis Dissecans eMedicine Sports

Jacobs & Ertl — 2007-07-11 00:03:43 GMT

Osteochondritis dissecans (OCD), by definition, is a disorder of one or more ossification centers, characterized by sequential degeneration or aseptic necrosis and recalcification. OCD lesions involve both bone and cartilage. These lesions differ from acute traumatic osteochondral fractures; however, they may manifest in a similar fashion. OCD lesions also must be differentiated from meniscal pathology. OCD causes 50% of loose bodies in the knee. The etiology of these lesions is multifactorial, including trauma, ischemia, abnormal ossification centers, genetic predisposition, or some combination of these factors. Little agreement exists among researchers regarding the etiology of OCD.

Knee Osteochondritis Dissecans FPNotebook

Not Available — 2007-07-12 00:03:43 GMT

Knee OCD Osteochondritis Dissecans of the Knee
Sections - Epidemiology; pathophysiology; Sites involved; symptoms; signs; radiology; Management: Conservative; Surgical Indications

NLM Search for OCD knee

Myles Clough — 2007-07-12 00:03:43 GMT

Uses Google with search string allintitle: site:www.ncbi.nlm.nih.gov osteochondritis dissecans knee
Note - only finds articles with the words osteochondritis and dissecans and knee in the title. Comprehensive PubMed Search would find more (see Bibliography link)

Osteochondritis

Not Available — 2007-01-09 00:03:43 GMT

Osteochondritis dissecans of the knee is a disorder in which fragments of bone or cartilage come loose and float around in the knee joint. Other terms for this condition are chondral fracture and osteochondral fracture. The fragments may also be referred to as a joint mouse or lose bodies.

osteochondritis dissecans

Not Available — 2002-01-31 00:03:43 GMT

Radiology case 451-442
Clinical presentation: 13 year old male with pain in the knees. There are almost symmetrical defects of the articular surfaces on the medial side of the lateral condyles of both femora. On the left side the separated bone remains close to its site of origin. In the right knee, the fragment has moved and may be responsible for the ill-defined intra-articular densities, projected between the lateral conyles of right femur and tibia. The endosteal margin is better defined on the right side and this may reflect its greater exposure to intra-articular pressure changes or the density may be due to creeping substitution of newbone over old.

Osteochondritis Dissecans (OCD)

familydoctor.org editorial staff. — 2002-01-11 00:03:43 GMT

Osteochondritis Dissecans (OCD) GP Handout
In osteochondritis dissecans, a loose piece of bone and cartilage separates from the end of the bone because of a loss of blood supply. The loose piece may stay in place or fall into the joint space, making the joint unstable. This causes pain and feelings that the joint is "catching" or "giving way." These loose pieces are sometimes called "joint mice." Osteochondritis dissecans usually affects the knees and elbows.

Osteochondritis Dissecans A Diagnosis Not to Miss

Hixon & Gibbs — 2007-07-11 00:03:43 GMT

Osteochondritis dissecans is the most common cause of a loose body in the joint space in adolescent patients. Because clinical findings are often subtle, diagnosis requires a high index of suspicion. Limited range of motion may be the only notable clinical sign. The diagnosis is made by radiographic examination, and magnetic resonance imaging has a key role in determining the stability of the lesion. Conservative management is the mainstay of treatment for stable lesions. While the majority of patients respond to conservative treatment, those with unstable lesions require arthroscopic management. (Am Fam Physician 2000;61:151-6,158.)

Osteochondritis dissecans and other lesions of the femoral condyles JBJS B

Bradley J, Dandy DJ. — 2008-03-23 00:03:43 GMT

We reviewed lesions of the femoral condyles seen in 5,000 knee arthroscopies, recording the findings and the age and sex of the patients. We were able to distinguish the characteristics of developing and late osteochondritis dissecans, acute and old osteochondral fractures, chondral separations, chondral flaps and idiopathic osteonecrosis, and suggest that these are separate distinct conditions. Haemarthrosis was associated only with acute osteochondral fractures. The characteristic feature of osteochondritis dissecans was an expanding concentric lesion at the 'classical' site on the medial femoral condyle which appeared during the second decade of life and progressed to a concave steep-sided defect in the mature skeleton. Caffey's (1958) classification of epiphyseal dysplasias could not be applied to osteochondritis dissecans, which appeared to have a gradual onset without acute trauma. Much of the controversy about the cause of osteochondritis dissecans is the result of imprecise nomenclature.
Bradley J, Dandy DJ.

Osteochondritis Dissecans Mayo

Mayo Clinic Staff — 2007-07-11 00:03:43 GMT

Mayo Clinic Patient Information on OCD of the knee

Osteochondritis Dissecans of the Knee

Not Available — 2007-07-12 00:03:43 GMT

Illustration & brief notes. Links to other knne conditions

Osteochondritis dissecans of the knee AJR

De Smet et al — 2007-07-12 00:03:43 GMT

American Journal of Roentgenology, 1990 Vol 155, 549-553, Full Text
Osteochondritis dissecans of the knee: value of MR imaging in determining lesion stability and the presence of articular cartilage defects AA De Smet, DR Fisher, BK Graf and RH Lange
Osteochondritis dissecans is a lesion of articular surfaces that is of uncertain etiology. These lesions are seen on radiographs as a bony defect or fragmentation of the subchondral bone. A bony defect may be an actual surface hole or the defect may be filled with fibrous tissue or fibrocartilage. Similarly, the apparent bone fragments may be only partially attached so they are unstable and prone to displacement or they may be firmly attached with fibrous tissue. Knowledge of fragment stability and the presence of an articular cartilage defect is useful in deciding on treatment. This information cannot be determined on plain films or clinical examination. We correlated MR examinations with arthroscopic findings in 21 patients with osteochondritis dissecans of the knee to see if MR imaging could be used to predict lesion stability and articular cartilage defects. A high-signal interface between the lesion and the femur was used as evidence of lesion instability and was found in 15 lesions. One of these lesions was questionably stable at surgery; the remainder were unstable and partially attached. The other six patients had displaced fragments with large articular defects that were clearly visualized on the MR examinations. We conclude that MR imaging is useful in evaluating articular surface defects and lesion stability in patients with osteochondritis dissecans.

Osteochondritis Dissecans of the Knee MMG

Not Available — 2007-07-11 00:03:43 GMT

Outstanding patient information page

Osteochondritis Dissecans of the Knee Philadelphia

Pill et all — 2007-07-12 00:03:43 GMT

Osteochondritis Dissecans of the Knee: Experiences at The Children's Hospital of Philadelphia and a Review of Literature
From the 1Department of Orthopaedic Surgery, The Children's Hospital of Philadelphia
Abstract: Osteochondritis dissecans is a condition primarily found in the knee, elbow, and ankle, which affects subchondral bone and potentially the overlying articular cartilage. Although the etiology is not certain, possible causative factors include repetitive microtrauma, ischemia, genetic and endocrine factors, and anomalies of ossification. The etiology, presentation, and management is age-dependent, as osteochondral lesions have a much greater potential to heal when those affected are skeletally immature. The first line of treatment is to remove stress from the involved area by immobilization and activity modification. However, if non-operative measures are unsuccessful or if loose bodies are present, then surgical approaches may be used, some of which include: fixation with pins or screws, subchondral drilling, abrasion or drilling arthroplasty, and autologous chondrocyte implantation. This article discusses the etiology, clinical findings, diagnostic imaging, treatment options, rehabilitation, and considerations for future management based on current literature and our experiences at the Children's Hospital of Philadelphia.