Mesenchymal hamartoma mimicking hepatoblastoma: A cytological pitfall.

The case of a 9-month-old infant who presented with an abdominal mass since birth is discussed here. Fine-needle aspiration (FNA) cytology of this mass was performed, from which it was thought to be a small round tumor, possibly a hepatoblastoma (HB). Histopathologically, however, it was found to be a mesenchymal hamartoma (MH). This case report thus highlights this cytological limitation.