The familial contribution to non-syndromic ocular coloboma in south India

Abstract

Aims: To identify the proportion of familial cases of isolated ocular colobomatous malformations in a cose series from south India. Methods: Children with ocular coloboma without systemic features were recruited from multiple sources in Andhra Pradesh, India. Their families were traced, pedigrees drawn, and family members examined. Results: 56 probands, 25 females (44.6%) ond 31 males (57.4%) with a colobomataus malformation were identified. In 12 cases (21.4%) another family member was affected. The risk to siblings was 3.8%. The parents were consanguineous in 25 cases (44.6%). Conclusions: 21.4% of cases of isolated ocular coloboma in this highly consanguineous population of south India were familial, with both autosomal dominant and autosomal recessive mechanisms likely in different families.