Discussion:
Amniotic band sequence is a variable spectrum of congenital anomalies that result from in utero entrapment of fetal parts by amniotic bands. The incidence of amniotic band sequence is estimated to be between 1/1,200 to 1/15,000 live births and 1/70 stillbirths1.
The exact etiology of amniotic band sequence is unknown, however it is believed to be related to intrinsic and extrinsic factors. Intrinsic factors involve the disruption of the developing embryonic disk. Extrinsic factors involve the disruption of the amnion that causes entrapment of fetal part by mesodermal bands2.
The diagnosis of amniotic band sequence can be made prenatally or postnatally. Prenatal diagnosis is made via fetal ultrasound that detects constriction rings, limb amputation, craniofacial or body wall defects. Postnatal diagnosis of amniotic band sequence should be suspected in newborns with amniotic bands associated with limb constriction or amputation, body wall defects, and craniofacial abnormalities. Other abnormalities that have also been reported are a short umbilical cord and talipes equinovarus. Examination of fetal side of the placenta will often reveal amniotic strands2.
Differential diagnosis of ABS includes genetic syndromes (such as Adams-Oliver syndrome), teratogens (such as poor glycemic control early in pregnancy and thalidomide exposure), and synechiae and septa1. 
Prenatal management of ABS include fetoscopic in utero lysis of bands. After birth, a detailed physical exam along with imaging studies to determine the extent of ABS should be performed. Primary treatment for newborns is plastic and reconstructive surgery. The prognosis of ABS depends on the extent of the defects3.
AUTHOR CONTRIBUTIONS: Jesus Ruiz: Conceptualization; visualization; writing – original draft.
ACKNOWLEDGEMENT: None.
FUNDING INFORMATION: None.
CONFLICT OF INTEREST STATEMENT: The author declares no conflict of interest.
DATA AVAILABILITY STATEMENT: Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.
PATIENT CONSENT STATEMENT: Written informed consent was obtained from the patient to publish this report.