Mandibular peripheral primitive neuroectodermal tumor: a rare case report with review of literature.

Primitive neuroectodermal tumor (PNET) is a high grade malignant neoplasm of small round cell tumor family, commonly affecting children and young adults. Peripheral primitive neuroectodermal tumor (pPNET) is a predominately neural, nonepithelial malignancy seen outside the nervous system that can arise in any place throughout the body including the diverse tissues of the head and neck. The diagnosis of PNET is confounded by its clinical and histopathological similarity to Ewing's sarcoma of the bone and has seldom been reported in the literature.

Impact of mandibular distraction osteogenesis on the oropharyngeal airway in adult patients with obstructive sleep apnea secondary to retroglossal airway obstruction.

Aim: To evaluate the impact of mandibular advancement by distraction osteogenesis on the oropharyngeal airway in adult patients with retroglossal airway obstruction using two different techniques of mandibular distraction.

Materials And Methods: 13 adult patients with mandibular hypoplasia secondary to TMJ ankylosis with OSAS and radiographic, CT and polysomnographic evidence of OSAS were included in the study. MDO was performed (corpus distraction in 8 cases and morphometric distraction in 5 patients).