Hyperphosphatemic tumoral calcinosis.

Tumoral calcinosis (TC) is a rare locally aggressive lesion characterised by extra-articular soft tissue deposition of the calcium phosphate around large joints. The exact aetiology is not known. A 19-year-old boy presented with a painful progressive swelling around the bilateral elbow and left hip joints over a 6-month duration. Routine laboratory results showed a normal haemogram, and normal calcium and high phosphate levels. Imaging showed a soft tissue calcified mass around these joints. The cut surface of the excised mass showed myxoid material with areas of calcification. On microscopy, there were typical features of TC. Our case is being presented due to the rarity of the entity and the peculiar dual energy CT (DECT) finding which are being described for the first time in this pathology.