Se reporta y discuten las características de un tumor óseo, ubicado en la zona parasinfi siaria derecha en una paciente adolescente de 15 años de edad, con diagnóstico sistémico de enfermedad renal crónica terminal (ERCT). La lesión ósea mandibular, estudiada por imaginología 3D, correlacionada con los hallazgos clínicos, la histopatología del tejido obtenido por punción aspiración y los datos de la historia médica, establecieron el diagnóstico de tumor pardo en hiperparatiroisdismo secundario causado por la ERCT. Adicionalmente, se encontró pérdida de la lámina dura de los dientes y alteraciones del trabeculado óseo de los maxilares, falanges y cráneo. Se enfatiza la importancia de la punción- aspiración como procedimiento confi able, fácil y libre de complicaciones para el diagnóstico histopatológico de tumor pardo.

The word 'ankylosis' is derived from ancient Greek, meaning 'a rigid joint', in this case associated to an impediment for progressive mouth opening, as a consequence of a fibrous, bony, or mixed tissue junction between the mandibular condyle and the mandibular fossa. This condition may occur as a sequel of mandible and face trauma, infectious diseases, or as a manifestation of chronic diseases leading to joint damage. This limitation in mouth opening may lead to poor oral hygiene, dental cavities, dental and facial deformities, and obstructive sleep apnea. Surgical therapy is mandatory in such cases, and there are many procedures described in the literature. Our objective is to show our surgical experience in 5 selected patients who were operated in our institution on the basis of the current surgical protocols.

The word 'ankylosis' is derived from ancient Greek, meaning 'a rigid joint', in this case associated to an impediment for progressive mouth opening, as a consequence of a fibrous, bony, or mixed tissue junction between the mandibular condyle and the mandibular fossa. This condition may occur as a sequel of mandible and face trauma, infectious diseases, or as a manifestation of chronic diseases leading to joint damage. This limitation in mouth opening may lead to poor oral hygiene, dental cavities, dental and facial deformities, and obstructive sleep apnea. Surgical therapy is mandatory in such cases, and there are many procedures described in the literature. Our objective is to show our surgical experience in 5 selected patients who were operated in our institution on the basis of the current surgical protocols.