“Osteo” means bone and “chondral” refers to cartilage. Osteochondritis dissecans (OCD) is a condition that develops in joints, most often in children and adolescents. An osteochondral lesion of the talus (OLT) is an area of abnormal, damaged cartilage and bone on the top of the talus bone (the lower bone of the ankle joint). It is fre-quently caused by a traumatic event. INTRODUCTION. Tendinosis and tenosynovitis with low-grade partial tear of the insertion of the PTT on a type III navicular. [] Although majority may be associated with trauma, some may develop insidiously. The talus is the third most common location of osteochondral lesions behind the knee and the elbow. The cartilage can be torn, crushed or damaged and, in rare cases, a cyst can form in the cartilage. The dorsomedial portal is the … An osteochondral defect of the talus is a lesion involving talar articular cartilage and subchondral bone. Differentiation from a stress fracture is difficult, since both lesions usually present as vague pain in the midfoot in active young adults. [] This is a broad terminology that encompasses a variety of disorders including osteochondritis dissecans, osteochondral fractures, and osteochondral defects. The subchondral cysts may develop due to the forcing of cartilaginous or synovial fluid with every step. Osteochondral defects (OCDs) are very localised areas of joint damage which can occur in a number of different joints , not just the ankle. Fig 7. As management differs for the two lesions, a correct diagnosis is important. The lesions may either heal, stabilise or progress to subchondral bone cysts. Postoperatively, my surgeon told my spouse he drilled into the top of the navicular bone, evacuated the cyst, and filled the defect with bone marrow. An osteochondral lesion is an injury or fracture to the chondral surface or underlying subchondral bone. of medial half of osteochondral lesion of navicular bone (Na). Author information: (1)Department of Orthopaedic Surgery, University of Virginia Health System, Charlottesville, Virginia. Osteochondrosis is a family of orthopedic diseases of the joint that occur in children, adolescents and other rapidly growing animals, particularly pigs, horses, dogs, and broiler chickens. Osteochondral Lesions of the Talus Sara Lyn Miniaci-Coxhead, MD Dr. Miniaci-Coxhead or an immediate family member serves as a board member, owner, officer, or committee member of the American Orthopaedic Foot and Ankle Society. Osteochondral lesions of the talus are a reasonably infrequent cause of long-standing ankle pain and stiffness and are often the result of a severe ankle sprain type injury. It is also called an osteochondral defect (OCD) or talar osteochondral lesion (OCL). The defects cause deep ankle pain associated with weightbearing. Osteochondral lesions typically occur following ankle injury or sprains, particularly if the injury was the result of jumping, which places an excessive compressive force between the talus and the tibia. There's been no obvious cause. 3. However, the typical location differs. It occurs when a small segment of bone begins to crack and separate from its surrounding region due to a lack of blood supply. Osteochondral lesion (OCL) describes an injury to the articular cartilage surface of bone within a joint. Edematous focus of osteochondral injury in the navicular at the naviculocuneiform joint. An osteochondral lesion of the navicular bone in the foot is rare. Differentiation from a stress fracture is difficult, since both lesions usually present as vague pain in the midfoot in active young adults. The presence of an osteochondral lesion may initially go undetected and may manifest many months after the initial ankle injury. Research output: Contribution to journal › Article › peer-review With disease progression, the fragment may detach, leading to degenerative osteoarthritis (1). We surgically treated an osteochondral lesion associated with a stress fracture of the tarsal navicular. Talar dome lesions are usually caused by an injury, such as an ankle sprain. It is also called an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). It may result in a defect that subsequently affects the subchondral bone, and in severe cases may lead to formation of an osteochondral fragment. Symptomatic osteochondral ankle defects often require surgical treatment. Osteochondral lesions or osteochondritis dessicans can occur in any joint, but are most common in the knee and ankle. BACKGROUND: An osteochondral lesion of the navicular bone in the foot is rare. 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