dysostosis

dysostosis /dys·os·to·sis/ (dis?os-to´sis) defective ossification; defect in the normal ossification of fetal cartilages.

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cleidocranial dysostosis  a hereditary condition marked by defective ossification of the cranial bones, absence of the clavicles, and dental and vertebral anomalies.

craniofacial dysostosis  a hereditary condition marked by acrocephaly, exophthalmos, hypertelorism, strabismus, parrot-beaked nose, and hypoplastic maxilla.

mandibulofacial dysostosis  a hereditary disorder occurring in a complete form (Franceschetti syndrome) and a less severe form (Treacher Collins syndrome), with antimongoloid slant of the palpebral fissures, coloboma of the lower lid, micrognathia and hypoplasia of the zygomatic arches, and microtia.

metaphyseal dysostosis  a skeletal abnormality in which the epiphyses are normal and the metaphyseal tissues are replaced by masses of cartilage, producing interference with enchondral bone formation.

dysostosis mul´tiplex  Hurler's syndrome.

orodigitofacial dysostosis  orofaciodigital syndrome.

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dys·os·to·sis (dss-tss)

n.

The defective formation of bone. Also called dysosteogenesis.

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dysostosis (dis··stōˑ·sis),

n condition marked by defective ossification, particularly the abnormal ossification of fetal cartilages.

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dysostosis (disostō´sis),

n defective ossification.

dysostosis, cleidocranial

(klī´dōkrā´nēl),
n (Sainton's disease), See dysplasia, cleidocranial.

dysostosis, craniofacial,

n See syndrome, Crouzon.

dysostosis, mandibulofacial (TreacherCollins syndrome),

n a developmental disturbance of the cranial bones and hypoplasias of the upper part of the face. The mandibular body is underdeveloped, but the ramus is hyperplastic. The teeth are crowded and malposed.

dysostosis multiplex,

n See syndrome, Hurler's.

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dysostosis

defective ossification; a defect in the normal ossification of fetal cartilages.