Andrei Bogdan Gorgos MD, Abstract Co-Author: Nothing to Disclose

Viviane Khoury MD, Presenter: Nothing to Disclose

Etienne Cardinal MD, Abstract Co-Author: Nothing to Disclose

Marie-Josee Berthiaume MD, Abstract Co-Author: Nothing to Disclose

Elisabeth Cote MD, Abstract Co-Author: Nothing to Disclose

Danielle Raymond-Tremblay MD, Abstract Co-Author: Nothing to Disclose

1. To illustrate common and uncommon examples of HADD associated with adjacent osseous changes. 2. To describe different appendicular and axial sites that may show osseous changes associated with HADD. 3. To demonstrate imaging findings of osseous changes associated with HADD, emphasizing computed tomography and magnetic resonance imaging.

Hydroxyapatite crystal deposition disease (HADD) manifests as periarticular calcifications that have typical radiographic features. When symptomatic, HADD most commonly presents as calcific tendinitis (usually of the shoulder). Inflammatory changes may include other periarticular soft tissues such as bursae and ligaments. Uncommonly, the adjacent bone is also affected, often in the acute symptomatic phase. Osseous changes include bone marrow edema, intraosseous herniation of calcific deposits, cortical erosion, and more extensive bony destruction. The focus of this pictorial essay is to present cases in which bony changes were found to be associated with HADD, with emphasis on computed tomography and magnetic resonance imaging findings. Osseous changes associated with calcific tendinitis and bursitis in common and uncommon locations, as well as with ligamentous and intradiscal calcifications are presented.

Gorgos, A, Khoury, V, Cardinal, E, Berthiaume, M, Cote, E, Raymond-Tremblay, D, Osseous Changes Associated with Hydroxyapatite Deposition Disease: Imaging Findings with Emphasis on CT and MRI.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4418918.html