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Keratoglobus and blue sclera
Insights
This study identifies a rare genetic disorder characterized by keratoglobus, joint hypermobility, and hearing loss, inherited in an autosomal-recessive pattern. Affected individuals experience severe eye complications, including corneal perforations and vision loss.
Area of Science:
- Ophthalmology
- Genetics
- Connective Tissue Diseases
Background:
- Describes a rare autosomal-recessive condition affecting multiple systems.
- Highlights the genetic basis and inheritance pattern of the disorder.
Observation:
- Patients presented with keratoglobus, blue scleras, joint hyperflexibility, hearing alterations, and dental mottling.
- Keratoglobus was present from birth, with corneal perforations occurring after minor trauma.
- Histopathology revealed extremely thin corneal stroma, absent Bowman's layer, and thickened Descemet's membrane.
Findings:
- The condition exhibits an autosomal-recessive inheritance pattern.
- Severe ocular fragility leads to frequent corneal perforations and potential vision loss.
- Associated systemic features include joint hypermobility, hearing impairment, and dental anomalies.
Implications:
- Understanding this condition aids in early diagnosis and genetic counseling.
- Further research may reveal therapeutic targets for corneal fragility and other systemic manifestations.
- This study contributes to the knowledge base of rare genetic connective tissue disorders.
Abstract:
Five patients from two families had similar features including keratoglobus, blue scleras, hyperextensibility of the hand, wrist, and ankle joints, sensorineural conduction hearing alterations, and mottling of the teeth. Keratoglobus had been observed in all patients at, or shortly after, birth. Corneal perforations developed in seven of the ten eyes after minimal trauma. Repair of these perforations was complicated by the extremely thin corneas and six eyes had to be either enucleated or eviscerated. Histopathological examination of two of the enucleated eyes showed the corneal stromas of both eyes to be estremely thin, Bowman's membrane was absent, and Descemet's membrane was unusually thick. This condition has an autosomal-recessive inheritance pattern.