Clinical analysis of 592 patients with microtia
Okajima, H.; Takeichi, Y.; Umeda, K.; Baba, S.
Acta Oto-Laryngologica. Supplementum 525: 18-24
1996
ISSN/ISBN: 0365-5237 PMID: 8908264 Document Number: 469153
Clinical and statistical analyses were performed on 592 patients who visited our hospital between April 1968 and March 1995. The preponderance in men (64.7%) and right-side (58.4%) was distinct statistically. The material shows that grade III microtia, peanut-shell type, was the most frequent with 56.8%. It is complicated with congenital stenosis or atresia in most cases (92.0%). The degree of anomalies of the auricle and external auditory meatus was generally interrelated. Ten cases of familial microtia were discovered, and all parent-child cases were father-child. About 27.9% of the patients' mothers had had a cold, threatened abortion, gestosis, anemia, etc during their pregnancy. Except for 6 patients with Treacher-Collin's syndrome and 2 patients whose mothers took thalidomide during pregnancy, we could not demonstrate the cause of the microtia, whether general or environmental.