This young patient presented with left shoulder swelling. 

MRI images showed a heterogeneous mass within the subdeltoid bursa showing sedimentation sign, which was confirmed on CT. Biochemical parameters were within normal limits. The diagnosis of "tumoral calcinosis of subdeltoid bursa" was made.

Tumoral calcinosis is a hereditary disorder of phosphate metabolism characterized by large, painless periarticular calcified masses predominantly involving the major joints. Secondary causes of dystrophic or metabolic calcifications should be ruled out.