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Mesenchymal hamartoma of the chest wall (MHCW) is a rare condition. Previously, surgical resection has been advocated with considerable post-operative morbidity. Evidence for conservative management is lacking because the natural history of MHCW is unknown. We present serial measurements of an antenatally detected MHCW (8 antenatal ultrasounds and 2 postnatal computed tomographic scans). The study demonstrates that the relative tumor size peaked at birth and then decreased postnatally. Based on this evidence, we believe that MHCW can be managed conservatively in an asymptomatic patient., (Copyright © 2010 Elsevier Inc. All rights reserved.)

The authors report a case of hepatic mesenchymal hamartoma diagnosed prenatally with ultrasound scan and magnetic resonance imaging (MRI) and confirmed histologically postdelivery. The fetus had a multicystic mass in the left upper abdomen, which showed a rapid enlargement accompanying maternal hypertension and preterm labor. The patient was delivered by cesarian section at 30 weeks and 5 days weighing 1,190 g, and, at birth, a large abdominal mass and severe anemia were noted. Surgical resection and neonatal management were successful, and the patient is alive in a good condition after 3 years follow-up. Although histologically benign, because this lesion frequently results in perinatal complications such as fetal hydrops, maternal toxemia, and preterm labor, early careful fetal ultrasonography should improve the prognosis of this lesion., (Copyright 2003, Elsevier Science (USA). All rights reserved.)