Nasal chondromesenchymal hamartoma in an adolescent

Endoscopic view of the tumour. An arrow indicates the tumour in the left nasal cavity. The location of the middle turbinate is indicated by an arrowhead, and that of the inferior turbinate is indicated by an asterisk.

CT and MR images. Coronal (a) and sagittal (b) non-contrast CT images and coronal T2-weighted (c) axial T1-weighted (d) and gadolinium-enhanced coronal T1-weighted (e) images show a heterogenous mass (arrows) in the nasal cavity. An arrowhead in (b) indicates bony erosion of the roof of the nasal cavity, and an arrowhead in (c) shows a high-intense lesion in the ethomoid sinus.

Photomicrograph showing lobular proliferation of cartilaginous (arrows) and myxoid stromal (arrowheads) components.