Torch Infections and Prenatal Ultrasound Findings

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1 Tutorial [1] August 09, 2011 By Eran Casiff, MD [2] TORCH INFECTIONS AND PRENATAL ULTRASOUND FINDINGS Eran Casiff M.D. Department of Obstetrics and Gynecology Kaplan Medical Center Rehovot 76100, Israel Limitations Most infected fetuses are sonographically normal Ultrasound findings may change with time no correlation with infant outcome Cerebral Ventriculomegaly Measured at the posterior aspect of the choroid plexus Almost always symmetric 5% of cases can be attributed to fetal infection Intracranial Calcifications Intrauterine infection Periventricular hyperechoic foci - the hallmark May be located in the thalami and basal ganglia Small with no acoustic shadowing Most frequently seen with CMV and Toxoplasmosis Hydranencephaly Most severe manifestation of the destructive process Cerebral hemispheres replaced by fluid, brain stem preserved, falx present, absent or deviated, posterior fossa structures can be identified Reported in Herpes simplex, Toxoplasmosis and CMV Microcephaly Often associated with other CNS anomalies Diagnosed as three SD below the mean for gestational age Abnormal HC/AC and HC/FL ratios Isolated microcephaly documented in CMV, Rubella and Herpes simplex Cardiac Abnormalities Cardiomegaly, mostly in CMV Cardiothoracic ratio VSD, ASD, Pulmonic stenosis and coarctation of the aorta in Rubella Hepatosplenomegaly Documented in all TORCH infection Often a transient finding Normograms are available Intra-abdominal Calcifications Typical appearance: echogenic foci with acoustic shadowing Peritoneum, intestinal lumen, organ parenchyma, biliary tree and vascular structures Echogenic bowel in CMV and Toxoplasmosis Hydrops, Placenta and Amniotic Fluid Hydrops reported in most TORCH but may be transient Placentomegaly is usually associated with intrauterine infection, but small placentae have also been reported Hydramnios and oligohydramnios have been reported with similar frequency Fetal Growth Restriction Estimated weight below the 10th percentile Common feature with CMV, Rubella, Herpes simplex and Varicella Usually not seen with Toxoplasmosis and Syphilis TOXOPLASMOSIS Ventriculomegaly is the most frequently documented finding Intracranial calcifications, placentomegaly, liver calcifications and ascites Hyperechoic bowel have been reported Microcephaly never been reported in utero SYPHILIS Hepatomegaly and Placentomegaly are the most frequent sonographic manifestations Ascites, Hydrops and Hydramnios are less commonly reported Resolution of sonographic signs have been reported with maternal antibiotic therapy RUBELLA Incidence less than 1:100,000 live birth Prenatal diagnosis by sonographic findings have never been reported Potential detected abnormalities include: cardiac anomalies, microcephaly, hepatosplenomegaly, FGR, microphtalmia and cataract CMV The most common congenital infection affecting 1% of all live births 10% of infected neonates demonstrate clinical manifestations that potentially could be identified by prenatal sonography Ventriculomegaly, FGR, Intracranial calcifications and oligohydramnios are the most frequently reported findings HERPES SIMPLEX HSV are usually acquired at birth Intrauterine infections resulting in clinical signs has been reported in 100 cases worldwide Hydranencephaly is the only sonographic sign reported antenatally Microcephaly, interracial calcifications and FGR are potentially detectable VARICELLA ZOSTER The most common finding is Hydramnios Also reported: liver calcifications, hepatomegaly, hydrops, limb deformities, ventriculomegaly and FGR SUMMARY Sonography is not a sensitive test for fetal infection Normal fetal anatomy survey cannot predict a favorable outcome Multiple organ systems are affected in 50% of cases THANK YOU Page 1 of 19

2 TORCH INFECTIONS AND PRENATAL ULTRASOUND FINDINGS Eran Casiff M.D. Department of Obstetrics and Gynecology Kaplan Medical Center Rehovot 76100, Israel Page 2 of 19

3 Limitations Most infected fetuses are sonographically normal Ultrasound findings may change with time no correlation with infant outcome Page 3 of 19

4 Cerebral Ventriculomegaly Measured at the posterior aspect of the choroid plexus Almost always symmetric 5% of cases can be attributed to fetal infection Page 4 of 19

5 Intracranial Calcifications Intrauterine infection Periventricular hyperechoic foci - the hallmark May be located in the thalami and basal ganglia Small with no acoustic shadowing Most frequently seen with CMV and Toxoplasmosis Page 5 of 19

6 Hydranencephaly Most severe manifestation of the destructive process Cerebral hemispheres replaced by fluid, brain stem preserved, falx present, absent or deviated, posterior fossa structures can be identified Reported in Herpes simplex, Toxoplasmosis and CMV Page 6 of 19

7 Microcephaly Often associated with other CNS anomalies Diagnosed as three SD below the mean for gestational age Abnormal HC/AC and HC/FL ratios Isolated microcephaly documented in CMV, Rubella and Herpes simplex Page 7 of 19

8 Cardiac Abnormalities Cardiomegaly, mostly in CMV Cardiothoracic ratio Page 8 of 19

9 Hepatosplenomegaly Documented in all TORCH infection Often a transient finding Normograms are available VSD, ASD, Pulmonic stenosis and coarctation of the aorta in Rubella Intra-abdominal Calcifications Typical appearance: echogenic foci with acoustic shadowing Peritoneum, intestinal lumen, organ parenchyma, biliary tree and vascular structures Echogenic bowel in CMV and Toxoplasmosis Page 9 of 19

10 Hydrops, Placenta and Amniotic Fluid Hydrops reported in most TORCH but may be transient Placentomegaly is usually associated with intrauterine infection, but small placentae have also been reported Hydramnios and oligohydramnios have been reported with similar frequency Page 10 of 19

11 Fetal Growth Restriction Estimated weight below the 10th percentile Common feature with CMV, Rubella, Herpes simplex and Varicella Usually not seen with Toxoplasmosis and Syphilis Page 11 of 19

12 TOXOPLASMOSIS Ventriculomegaly is the most frequently documented finding Intracranial calcifications, placentomegaly, liver calcifications and ascites Hyperechoic bowel have been reported Microcephaly never been reported in utero Page 12 of 19

13 SYPHILIS Hepatomegaly and Placentomegaly are the most frequent sonographic manifestations Ascites, Hydrops and Hydramnios are less commonly reported Resolution of sonographic signs have been reported with maternal antibiotic therapy Page 13 of 19

14 RUBELLA Incidence less than 1:100,000 live birth Prenatal diagnosis by sonographic findings have never been reported Potential detected abnormalities include: cardiac anomalies, microcephaly, hepatosplenomegaly, FGR, microphtalmia and cataract Page 14 of 19

15 CMV The most common congenital infection affecting 1% of all live births 10% of infected neonates demonstrate clinical manifestations that potentially could be identified by prenatal sonography Ventriculomegaly, FGR, Intracranial calcifications and oligohydramnios are the most frequently reported findings Page 15 of 19

16 HERPES SIMPLEX HSV are usually acquired at birth Intrauterine infections resulting in clinical signs has been reported in 100 cases worldwide Hydranencephaly is the only sonographic sign reported antenatally Microcephaly, interracial calcifications and FGR are potentially detectable Page 16 of 19

17 VARICELLA ZOSTER The most common finding is Hydramnios Also reported: liver calcifications, hepatomegaly, hydrops, limb deformities, ventriculomegaly and FGR Page 17 of 19

18 SUMMARY Sonography is not a sensitive test for fetal infection Normal fetal anatomy survey cannot predict a favorable outcome Multiple organ systems are affected in 50% of cases Page 18 of 19

19 THANK YOU Source URL: Links: [1] [2] Page 19 of 19

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