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Fetal vascular malperfusion (FVM) is diagnosed by the presence of vascular lesions in the muscularized fetal vessels in the placenta and the resultant changes in the downstream villi. The Amsterdam Placental Working Group recognizes two patterns of FVM namely segmental and global. The aim of this study was to estimate the frequency of FVM lesion in our population and to understand its neonatal associations. Fifty-four placentas with FVM and 56 controls collected over 34 months. The maternal and neonatal details were collected from the case charts. The patterns and grades of FVM lesions were related to the clinical factors and significance analyzed statistically using the Chi-square test and  t -test and  p  &lt; .05 was considered significant. The frequency of FVM was 8.7%. The FVM group showed lower mean gestational age, birth weight, and placental weight with a higher frequency of IUGR. Poor neonatal survival, non-reassuring fetal status, neurological abnormalities, neonatal sepsis, asphyxia, low Apgar, and respiratory support requirement were significantly higher in the FVM group. A similar frequency of segmental and global lesions was seen. High grade lesions ( n  = 35) were common than low grade ( n  = 19). Neonatal associations were more often seen in segmental and high-grade lesions. In the absence of antenatal diagnostic tools to identify FVM, placental examination is critical and the only definitive method to diagnose FVM, which alerts the clinician to monitor for several neonatal morbidities. Identification and typing the lesion as per the new guidelines proves significant risk associations with specific types of FVM.

Fetal vascular malperfusion (FVM): diagnostic implications and clinical associations