Brown tumor presenting as a tibiallesion of suspected malignant origin: a case report

Hyperparathyroidism is rarely presenting as brown tumor in recent years and in those rare cases cranial involvement was frequently reported. We did not find any publication about this condition in the Kingdom of Saudi Arabia after reviewing PubMed. We present a case of a female patient presenting with prolonged history of right proximal anterior tibial painful mass that initially was suspected to be of malignant origin. Different imaging modalities were used which initially bred conflict among Radiologists. Relevant blood tests were last to be requested and the high levels of parathyroid hormone (PTH), hypercalcemia combined with nuclear imaging findings confirmed the presence of right parathyroid adenoma. The rarity and unusual presentation made the diagnosis challenging.