Trisomy 22 with thyroid isthmus agenesis and absent gall bladder.

This manuscript reports a fetus of 24 weeks gestation, detected on echography to have congenital anomalies: intra-uterine growth retardation, facial dysmorphism, ventricular septal defect with aortic displacement and 8-mm nuchal skinfold thickness. Karyotype was performed. Post termination of pregnancy autopsy showed additionnal internal organ anomalies included: absent gall bladder and thyroid isthmus agenesis. To our knowledge, these anomalies have never been described in trisomic 22 fetuses. This case suggests that chromosome 22 could play a role in thyroid development.