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Retinal/macular pigmentation in conjunction with ring 14 chromosome.
P J Howard1, D Clark, J Dearlove
1Regional Cytogenetics Unit, Royal Liverpool Hospital, UK.
Human Genetics
|October 1, 1988
Summary
Ring 14 chromosome patients often have eye pigmentation, but a case with a terminal deletion lacked this feature. This suggests a specific chromosome 14 region may control these ocular changes.
Area of Science:
- Genetics
- Ophthalmology
- Chromosomal abnormalities
Background:
- Ring 14 chromosome is a rare condition associated with several clinical features.
- Recent studies proposed retinal/macular pigmentation as a consistent characteristic of this syndrome.
Observation:
- This study details a patient with a ring 14 chromosome and a terminal deletion.
- The patient presented without the previously suggested retinal/macular pigmentation.
Findings:
- The absence of retinal pigmentation in this case challenges its status as a constant feature of ring 14 chromosome syndrome.
- Comparison with other cases suggests a specific chromosomal region (14 proximal to q32.2) may be responsible for these ocular changes.
Implications:
- These findings refine the understanding of ring 14 chromosome syndrome's clinical variability.
- Identifying the specific genetic region involved can aid in future genetic counseling and diagnosis.