Tumoral Calcinosis

• Progressively enlarging, juxta-articular, calcified, nodular soft-tissue masses

• Mostly occurs in 1st or 2nd decade

• Equal M:F

  • Predominantly African-Americans

• Normal calcium and phosphorous

  • No renal, metabolic or collagen-vascular disease

• Autosomal dominant with variable expressivity

• Pathology: multilocular cystic lesions containing creamy white fluid

  • Hydroxyapatite crystals in suspension

• Clinical

  • Painful/painless soft tissue mass

  • Hips>elbows>shoulders>feet

  • Not knees

• Imaging

  • Large, nodular, smoothly-marginated juxta-articular masses of calcium density

  • Fluid-fluid levels on erect films due to Milk of Calcium in lesion

  • Underlying bone normal

Tumoral Calcinosis. There is a well-circumscribed and multi-lobular area of increased density consistent with calcification in the soft tissue of the anterior forearm near the elbow joint. The density has an almost tumor-like appearance. The underlying bone is normal in appearance.