Osteonecrosis can accompany many diverse disease processes, such as trauma, hemoglobinopathy, exogenous or endogenous hypercortisolism, alcoholism, pancreatitis, dysbaric conditions, and Gaucher’s disease. It may also become evident without any recognizable disease or event (primary, or spontaneous, osteonecrosis). Post-traumatic osteonecrosis is most frequent in the femoral and humeral heads, scaphoid, and talus, although other sites may be affected. Dysbaric osteonecrosis can produce widespread skeletal alterations of the epiphyseal, metaphyseal, or diaphyseal segments of tubular bones. Spontaneous osteonecrosis is most commonly recognized about the hip and knee. Possible complications of bone necrosis are secondary degenerative joint disease, formation of intra-articular osseous and cartilaginous bodies, septic arthritis, pathologic fracture, and cystic or sarcomatous transformation. The candidate will learn the mechanics of putting together an electronic poster presentation in lecture type format. This will be an official peer-reviewed publication. The publication will be a favorable addition to the candidate's CV. The candidate will be the first author, and I am the second author. A candidate is not limited to completing one project. He/she can do as many as they like! (There are always topics to teach about) The candidate, myself, King's College Hospital Department of Radiology and King's College all benefit from this publication.