Head and Neck ImagingChondrosarcoma, head and neck
malignant neoplasm derived from
cartilage cells. For a general description, see
chondrosarcoma. In the head and neck, they are seen originating from the jaw bones, sinonasal region (usually naso-ethmoidal), skull base, larynx and trachea (
Fig.1). The distinctive feature of these tumours is a mass containing scattered calcifications, as visible on
CT. On
MRI they usually display low signal on T1-weighted and high signal on T2-weighted sequences; they may show enhancement.
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CT images showing a mass centred on the proximal tracheal wall, with intra- and extratracheal extension. The mass enhances inhomogeneously (a) and contains scattered calcifications (b, bone window, 5 mm caudal to a).
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Chondrosarcoma, head and neck, Fig.1 (a) | | Chondrosarcoma, head and neck, Fig.1 (b) | |