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Osteogenesis imperfecta (OI) is a rare hereditary connective tissue disease that results in a bone fragility, blue sclerae and hearing loss. The objective of our study was to determine the heterogeneity and variety of the clinical- hearing spectrum of the OI. Methods: Genetic study was performed in a four-member family, where three of them presented hearing impairment. Results: Genetic study performed to the four patients determine c.804+1G›A heterozygosis mutation in the 11 intron of COL1A gene, in those three patients with hearing loss. Severity and type of hearing loss found were different in each patient: in one case a mild bilateral neurosensorial hearing loss, with high frequencies affected; another one bilateral moderate mixed hearing loss, and the third one was a unilateral mild conductive hearing loss. Conclusions: Hearing loss associated with c.804+1G>A mutation in the 11 intron of del COL1A1 gen, is characterized by a high variability related to the severity and kind of hearing loss developed, that it could be even neurosensorial or conductive type, even in members of the same family.

Osteogénesis Imperfecta: Estudio auditivo y genético de una familia con una mutación en el gen COL1A1.