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DMS333-SP5
USIDMS Trisomies, Multiple Gestations
| Question | Answer |
|---|---|
| What are chromosomes 1-22 are referred to as? | Karyotypes |
| What is curvature of the 5th digit of hand reffered to as, and what is it associated with? | Clinodactyly, T21/Down's |
| What is 3 complete sets of chromosomes referred to as? | Tripliody/Mosaic karyotype (not compatible with life |
| Complete or partial absence of 2nd sex chromosome (female) | Turner's syndrome/X0 karyotype |
| Trisomy 13 is also known as | Patau's syndrome |
| What is an abnormal amount of chromosomes known as? | Aneuploidy |
| What is Edward's syndrome? | Trisomy 18 |
| A nuchal fold greater than 6 mm is indicative of | T21/Down's syndrome |
| XXY | Klinefelter's syndrome (male, typically sterile) |
| XYY | Not clinically significant, children may be sterile |
| Consistent increased nuchal translucensy at neck is known as | Cystic hygroma |
| Progression of cystic hygroma in to other tissues is known as | Hydrops |
| Conjoined twins results from what? | Monozygotic twins that split on day 13+ |
| What is a triangular projection of chorionic villi between 2 amniotic membranes known as? | Twin peak sign |
| Malformed, anencephalic twin is perfused by normal twin instead of dying, occurs w/ vascular communication between twins through placenta | Acardiac twin/TRAP (twin reversed arterial perfusion) |
| Parasitic twin, one twin found within abdomen of sibling | Fetus in fetu |
| Absorption of non-viable fetus in twin gestation, may mimic subchorionic hemorrhage | Vanishing twin |
| 2 chorions and 2 amnions are associated with dyzygotic twins and monozygotic twins that divided on days ______ | Days 0-3 |
| What is the only definite way to tell sonographically that twins are dizygotic? | Different sexes |
| When monozygotic twins share a vascular supply and blood is shunted away from the donor twin and to the recipient twin |