A rare case of mesenchymal hamartoma of chest wall in a neonate

Mesenchymal hamartoma of the chest wall (MHCW) is an extremely rare, benign lesion arising from one or more ribs. Typically, MHCW manifests as a unilateral lesion, yet there have been instances of multiple or bilateral occurrences documented. It is reported to have an increased male predisposition and the common presentation includes a visible chest wall mass. In asymptomatic neonates, conservative management is the preferred approach since there have been no reports of malignant transformation. Surgical intervention becomes necessary in cases where there is an active growth of the lesion or respiratory compromise. Here, we present a case of unilateral MHCW in a newborn being managed conservatively, followed by surgical resection at 2 months of age.