Q91.6

Clinical Causes: Genetic translocation involving chromosome 13, where part of chromosome 13 attaches to another chromosome. Hereditary factors, as the translocation can be inherited from a parent who carries a balanced translocation without showing symptoms. Random genetic errors during the formation of reproductive cells (sperms or eggs).

Key Symptoms: Severe intellectual disability and developmental delay. Multiple birth defects including cleft lip or palate. Facial abnormalities such as small or malformed eyes, a broad nose, and low-set ears. Midline defects affecting the heart, brain, and other organs. Polydactyly (extra fingers or toes). Microphthalmia (abnormally small eyes). Cutaneous or skin abnormalities. Other congenital abnormalities affecting the kidneys, limbs, and digestive tract.

Diagnosis Path: Diagnosis of Trisomy 13 translocation involves genetic testing, which may include: - Karyotyping: a laboratory test that examines the chromosomal structure. - Fluorescence in situ hybridization (FISH): a more detailed analysis to identify specific genetic translocations. - Chorionic villus sampling (CVS) or amniocentesis during pregnancy to detect chromosomal anomalies. Early detection through prenatal screening can facilitate medical planning and parental counseling.

Treatment Protocols: There is no cure for Trisomy 13; treatment focuses on managing symptoms and supporting the individual’s health and development. Approaches may include: - Surgical interventions to correct heart defects and other structural anomalies. - Physical, occupational, and speech therapy to promote development. - Supportive care for feeding difficulties, respiratory issues, and sensory impairments. - Multidisciplinary medical teams working together to address the various health needs. Prognosis varies widely depending on the severity of anomalies; many affected infants face significant health challenges with limited life expectancy.