Corey J. Chakarun MD, Presenter: Nothing to Disclose

Brenna Talkin MD, Abstract Co-Author: Nothing to Disclose

Miriam Romero MD, Abstract Co-Author: Nothing to Disclose

Eric Allan White MD, Abstract Co-Author: Nothing to Disclose

Philip Whitney Ralls MD, Abstract Co-Author: Nothing to Disclose

Our purpose is to: (1) Discuss the imaging characteristics of tumoral calcinosis on conventional radiographs and CT; (2) Describe our experience of imaging tumoral calcinosis using ultrasound and MRI; and (3) Correlate the imaging findings with histopathology for each case.

1. Definition of tumoral calcinosis 2. Primary tumoral calcinosis 3. Secondary tumoral calcinosis 4. Clinical manifestations 5. Histopathology 6. Imaging findings: - Conventional radiography - Computed tomography - Ultrasound - Nuclear scintigraphy - Magnetic resonance imaging

Tumoral calcinosis is a relatively rare disorder which causes para-articular, multilobulated, calcific masses. A characteristic finding on CT and conventional radiographs is the "sedimentation sign," which represents the dependent layering of hydroxyapatite crystals. In our experience, this imaging finding may also be seen using ultrasound, representing a "sonographic sedimentation sign." This sign may further aid in diagnosis and could potentially be used for ultrasound-guided biopsy.

Chakarun, C, Talkin, B, Romero, M, White, E, Ralls, P, Tumoral Calcinosis: "Sonographic Sedimentation Sign" with Histopathologic Correlation.  Radiological Society of North America 2010 Scientific Assembly and Annual Meeting, November 28 - December 3, 2010 ,Chicago IL. http://archive.rsna.org/2010/9003413.html