Ankle: Talar Dome Osteochondritis Dissecans Explained

In this ankle imaging teaching video, we walk through osteochondritis dissecans (OCD) of the talar dome and how to assess it on X-ray and MRI. 🦴 Learning objectives: Appreciate the talar dome as the classical location for ankle OCD Understand that parts of the talar dome can superimpose with the medial and lateral malleoli, making OCD lesions difficult to see on the lateral view Learn how to detect a large talocrural joint effusion on the lateral view Gain a basic understanding of how MRI helps judge whether an OCD lesion is stable or unstable (bone marrow oedema, fluid behind fragment, cartilage breach) 👩‍⚕️ Ideal for: Radiology and orthopaedic trainees Sports medicine clinicians and emergency doctors Exam candidates (FRCR / boards) learning high-yield ankle pathology