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A brown tumor?
A patient on peritoneal dialysis develops a swelling in his shoulder. CT and MRI identifies a multilobular cystic mass that clinically diagnoses as a brown tumor, but there is enough calcium in the mass that tumoral calcinosis has not been ruled out. Additionally, the patient’s PTH level is only 3-400. Does that relatively low-level rule out a hyperparathyroid lesion such as a brown tumor? Should B-2 microglobulin related amyloidosis in the differential diagnosis? How do we sort this out and how it is best treated? Follow this thread to find out.

Summary provided by Roger Rodby, MD, FASN.
Previous Community Minded Summaries are available at: https://community.asn-online.org/browse/communityminded