Iridogoniodysgenesis, dominant type

Common Name(s)

Iridogoniodysgenesis, dominant type

Anterior segment dysgeneses (ASGD or ASMD) are a heterogeneous group of developmental disorders affecting the anterior segment of the eye, including the cornea, iris, lens, trabecular meshwork, and Schlemm canal. The clinical features of ASGD include iris hypoplasia, an enlarged or reduced corneal diameter, corneal vascularization and opacity, posterior embryotoxon, corectopia, polycoria, an abnormal iridocorneal angle, ectopia lentis, and anterior synechiae between the iris and posterior corneal surface (summary by {3:Cheong et al., 2016}). Anterior segment dysgenesis is sometimes divided into subtypes including aniridia (see {106210}), Axenfeld and Rieger anomalies, iridogoniodysgenesis, Peters anomaly, and posterior embryotoxon ({5:Gould and John, 2002}). Patients with ASGD4 have been reported with iridogoniodysgenesis or Peters anomaly subtypes. Iridogoniodysgenesis, which is characterized by iris hypoplasia, goniodysgenesis, and juvenile glaucoma, is the result of aberrant migration or terminal induction of the neural crest cells involved in the formation of the anterior segment of the eye (summary by {12:Mears et al., 1996}). Peters anomaly consists of a central corneal leukoma, absence of the posterior corneal stroma and Descemet membrane, and a variable degree of iris and lenticular attachments to the central aspect of the posterior cornea ({14:Peters, 1906}).
 

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