Science and Education Publishing American Journal of Medical Case Reports 2 11 2014 10 29 Simultaneous Maxillary and Mandibular Brown Tumors as the First Presentation of Secondary Hyperparathyroidism 240 242 EN Btissaam. Belhoucha Department of ENT, CHU Med VI, Marrakech, Morocco Hiroual abelatif Hassan. Nouri Youssef. Rochdi Bouaichi amine lahcen. Aderdour N. Mansouri Hattab Abdelaziz. Raji AJMCR20142114 10.12691/ajmcr-2-11-4 2014 10 15 2014 10 25 2014 10 29 Brown tumor represents a serious and late bony complications of advanced hyperparathyroidism with a frequency of 1.5-1.75 percent in secondary hyperparathyroidism and 3�C4 percent in primary hyperparathyroidism. Here we describe an extremely rare case of a 19-year-old male patient with a brown tumor localised in the maxilla and mandibular due to secondary hyperparathyroidism compromising mastication, phonation and social ease of the patient. An early diagnosis and a timely parathyroidectomy in a medically resistant hyperparathyroidism are an optimal option to control the growth of the bony lesion