The ankle joint is composed of the bottom of the tibia (shin) bone and the top of the talus (ankle) bone. “Osteo” means bone and “chondral” refers to cartilage. It is also called an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). “Osteo” means bone and “chondral” refers to cartilage. A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. To diagnose this injury, the surgeon will question the patient about recent or previous injury and will examine the foot and ankle, moving the ankle joint to help determine if there is pain, clicking or limited motion within that joint. Talar dome injuries result from trauma to the ankle including ankle sprains (6-38% of all ankle sprains), fractures (greater than 70% of all ankle fractures). WHAT IS A TALAR DOME LESION? Patients with OLTs will usually have a history of inversion injury but keep in mind that spontaneous necrosis can occur without a history of trauma. The top of the talus is dome-shaped and is completely covered with cartilage—a tough, rubbery tissue that enables the ankle to move smoothly.A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. OLTs have been known historically by varied nomenclature, including osteochondritis dissecans, talar dome fracture, transchondral fracture, and flake fracture. Osteochondral lesions (OCL) of the talus are defined as any damage involving both articular cartilage and subchondral bone of the talar dome. [1] Osteochondral lesion of the talus (OLT) is a broad term used to describe an injury or abnormality of the talar articular cartilage and adjacent bone. Talar dome lesions … (1,2,3) Talar dome injuries create a focal defect in the dome of the talus that results in injury to the cartilage and underlying bone. This is referred to as an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). Medial talar dome lesions are usually deeper and cup-shaped. The medial lesion could be produced when the plantarflexed foot was subjected to an inversion force. Talar dome lesions … A talar dome lesion can be difficult to diagnose because the precise site of the pain can be hard to pinpoint. Rehabilitation Protocol: Ankle Arthroscopy WITH Talus OCD Microfracture Phase I - Post-operative Period (Weeks 0-1) • NON-weightbearing • Splint immobilization • Daily icing, compression and elevation home program Phase II (Weeks 1-3) • Weightbearing: Contine NON … A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. https://illinoisfoot.com/ankle-pathologies/ankle-joint-pain/ “Osteo” means bone and “chondral” refers to cartilage. It is also called an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). They are usually the result of plantarflexion, inversion and external rotation. This term covers a wide spectrum of pathologies including (sub)chondral contusion, osteochondritis dissecans, osteochondral fracture and osteoarthritis resulting from longstanding disease. The lateral talar dome lesion could be produced with a combination of ankle dorsiflexion and inversion. Osteochondral lesions may also involve the talar dome, most frequently the medial aspect. If a bone scan is negative, but symptoms persist, the next study should be MR imaging, which may be the most sensitive test for occult lesions of the talar dome. If an osteochondral lesion of the talar dome is present, further evaluation with CT is appropriate to evaluate the location, size, and displacement of the bone fragment. It is relatively prevalent and are an important cause of ankle morbidity. A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. Osteochondral lesions of the talus (OLT) bring the challenges both of articular cartilage healing and a constrained area of access in the ankle joint.