Rupture of the amnion during pregnancy may be followed by the formation of constrictive bands formed from the amnion.
Possible causes:
(1) idiopathic
(2) trauma
(3) attempted abortion
(4) amniocentesis
(5) Ehlers-Danlos syndrome or other hereditary defect of collagen
Clinical features:
(1) oligohydramnios
(2) amniotic bands on the placenta
(3) constrictive bands involving the fingers, hands or extremities
(3a) deep grooves
(3b) amputation
(3c) pseudosyndactyly
(3d) tethering of a limb
(4) constrictive bands involving the umbilical cord
(5) decreased fetal movement (due to tethering and/or olighohydramnios)
(6) limb deformities (clubfoot)
(7) pulmonary hypoplasia (associated with oligohydramnios)
Differential diagnosis: limb-body wall complex
