Endocrine Abstracts

Brown tumors represent a late-stage bone change caused by primary hyperparathyroidism, presenting in only 2–3 percent of the cases. Therefore as primary manifestations there is even a smaller percent. The common sites of brown tumor are the long bones, ribs, clavicle or pelvic girdle. The solitary palate brown tumor as initial presentation of a primary hyperparathyroidism is rare and often accompanied by tumors of other facial bones. We present the case of a 67 year old woman with initial presentation of a large tumor of the right palate, with no extension to the orbits. The first histological diagnosis was of a giant cell tumor, which delayed the diagnosis of the underlying cause for about 6 months, when the patient’s relatives requested a second opinion on the initial histological findings, the second analysis revealed the same diagnosis but recommended that a primary or secondary hyperparathyroidism should be excluded as the brown tumor is very similar to the one with giant cells. We received the patient at this moment when we immediately diagnosed a primary hyperparathyroidism and sent the patient to surgery. Unfortunately in this case the long progression of high levels of PTH affected a lot the mineral density of the bones and now the patient is highly osteoporotic. The particularity of the case is the location of the brown tumor and the delayed diagnosis of a first primary hyperparathyroidism.