Biomedical subjects

T L Engel

Publications and source records attributed to T L Engel.

3 recordsLinked to original sources

PubMed1992

Teratoma of the tongue: a case report and review of the literature.

Teratoma of the tongue is a rare tumor of the oral cavity with only six reported cases in the literature. Teratomas are composed of ectoderm, mesoderm and endoderm with differentiation to identifiable tissues and organs. Embryologically, they are thought to occur as a result of displacement of cells from normal tissue during fetal life. In the tongue, the teratoma may result from misplaced cells from the tuberculum impar. Differential diagnosis of tongue lesions includes thyroglossal duct cyst, lingual thyroid, lymphangioma, hemangioma, dermoid cyst, granular cell myoblastoma and heterotopic gastric mucosal cyst. Computerized tomography is useful in differential diagnosis and defining extent of disease. Surgical excision with laser is curative and recurrence is rare.

Female↗

PubMed1984

Stapedectomy in residency training.

The number of new patients with otosclerosis seen by the average otolaryngologist has declined over the past several years. As a result, a controversy has arisen regarding the ability to train residents adequately in the technique of stapedectomy. In this regard, we have analyzed 44 consecutive stapedectomies performed by senior residents, under direct faculty supervision, at the University of California, San Francisco. All procedures were total stapedectomies, performed under local anesthesia, utilizing either wire-vein or wire-perichondrium technique. Four of the ears required footplate or promontory drilling. Closure to within 10 dB of the preoperative bone conduction, averaged over the speech frequencies of 500, 1000, and 2000 Hz, was achieved in 75% of ears, and closure to within 20 dB in 93% of ears. In no patient was hearing made worse. While there were no permanent complications, self-limited problems occurred in 9% of the procedures. Despite a declining caseload of otosclerotic ears in residency programs, it is possible to train residents safely in stapes surgery, given a program of consistent technique and close faculty supervision.

Adult↗

PubMedDate not supplied

Effect of kilovoltage and milliamperage on focal spot size.

Producing radiographs of the best possible quality is the responsibility of every radiologic technologist. Many factors affect the finished radiograph, yet the effect of kilovoltage and milliamperage on a selected focal-spot size is almost always overlooked. With the selection of appropriate milliamperes and kilovolts, one can maintain high radiographic quality, reduce radiation absorbed dose to the patient, and prolong equipment life. Supporting data based on laboratory research are provided.

Humans↗