label: Sinonasal Chondromesenchymal Hamartoma
label_lc: sinonasal chondromesenchymal hamartoma
description: A very rare benign lesion that arises from the sinonasal tract and is characterized by the presence of cartilage, myxoid stroma, and other mesenchymal elements. It presents as a polypoid mass and usually affects infants and children.