Zwei atavistische Merkmale des Kehlkopfskelettes

Abstract

In the analysis of laryngeal anomalies in 30 selected phoniatric patients by CT examination, 2 atavisms of the laryngeal skeleton were found. The ventral enclosure of the thyroid cartilage by the hyoid bone presents an inhibition malformation of the laryngeal skeleton with essential reduced vocal ability. The posterior junction between the cornu majus ossis hyoidei and the cornu superius cartilaginis thyroideae is marked by the direct contact of these cornua lacking the ligamentum thyrohyoideum laterale. Both anomalies are characterized by the persistence of the close relation between the hyoid bone and the thyroid cartilage, which normally exists phylogenetically as well as ontogenetically. That could be shown by anatomical sections performed on 4 human newborns in the horizontal plane.

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“…The review of specific literature about calcifications of the thyrohyoid ligament (Porrath, 1969;Kainz et al, 1990;Avrahami et al, 1994;Urben and Ransom, 1999) provides only one clinical case with the same X-ray characteristics as the Besora hyoid. Klinefelter (1952) presents the case of an anomalous hyoid bone related to a large hyoid body and calcification of the stylohyoid and thyrohyoid ligaments.…”