Biomedical subjects
Publications and source records attributed to K L Parrish.
Mandibular and maxillary cysts originate from elements of the teeth (odontogenic), or from epithelial remnants trapped in fusion lines during development (nonodontogenic). Both types can be clinically asymptomatic and must be treated surgically. The specific diagnosis of a jaw cyst and its recurrence depends upon the anatomical location, the radiographic appearance, and the pathological diagnosis.
Subglottic stenosis, a laryngeal narrowing, can be either congenital or acquired. There are various anatomic abnormalities of the cricoid that explain the congenital types. The acquired type is due to prolonged intubation in 90% of cases. Anterior cricoid split can obviate the need for a tracheotomy in the neonate with minimal nonfibrotic subglottic stenosis. Laryngotracheal reconstruction allows correction of the more severely stenotic children. Both of these procedures strive to provide an adequate airway and a satisfactory voice.
External auditory canal atresia (EACA) can occur bilaterally as well as unilaterally. Usually there is an accompanying auricular deformity. Surgical intervention in bilateral cases is mandatory to promote normal speech and language development. Unilateral EACA cases often do not receive surgical intervention until the patient is 18 years of age. Preoperative evaluation of the EACA patient requires behavioral audiometry, auditory brain stem evoked response, and a computerized tomographic scan.