eMedicine Specialties > Orthopedic Surgery > Pediatrics
Streeter Dysplasia: Workup
Updated: Mar 30, 2009
Workup
Laboratory Studies
- Because amniotic band syndrome is an extrinsic yet spontaneous phenomenon, no good laboratory tests exist to detect its presence. Levels of a -fetoprotein have been shown to be elevated with normal acetylcholinesterase activity, but this elevation may be due to the anencephaly (with positive acetylcholinesterase isoenzymes) or fetal demise (negative acetylcholinesterase isoenzymes).
Imaging Studies
- Serial ultrasounds can show the gross lack of formation, such as anencephaly or intrauterine amputations, but ultrasound studies of monozygotic twins have been disappointing.17 One study reported ultrasonic evidence of ABS in both twins, but only one twin had clinical manifestations (and those were severe). With the advancement of ultrasound technology and the availability of 3-D and 4-D ultrasound, the defect can now be characterized down to the level of how the nerves and muscles are affected distally.18,19,20 Prenatal diagnosis of atypical facial clefting should alert physicians to the possibility of ABS and other anomalies.21 This may help prenatal counseling and family preparation.
- MRI could be considered preoperatively on limbs with deep bands to evaluate the neurovascular status.
- Magnetic resonance angiography of limbs affected by ABS may reveal vessel deficiencies and variable anatomy that could affect the surgical outcome.
Diagnostic Procedures
- Amniocentesis has been associated with membrane rupture after needle placement. Therefore, it has no significant place in the diagnosis or treatment of this syndrome.
More on Streeter Dysplasia |
| Overview: Streeter Dysplasia |
Workup: Streeter Dysplasia |
| Treatment: Streeter Dysplasia |
| Follow-up: Streeter Dysplasia |
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References
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Keywords
Streeter dysplasia, congenital constriction band syndrome, amniotic band syndrome, ABS, constricting rings, acrosyndactyly, intrauterine amputation, digital amputations, ADAM complex, limb body wall syndrome, pseudo-ainhum, pseudoainhum, hemihypertrophy, anterolateral bowing, pseudarthrosis, leg-length discrepancy, teratologic clubfeet
Workup: Streeter Dysplasia