Chondroma of thyroid cartilage (1 of 4)
CT scan of the larynx, showing the thyroid cartilage (outlined by gray dotted lines) and an abnormality deforming the thyroid cartilage on one side (between the white arrows). Note how the thyroid cartilage bulges on that side, as compared with the opposite side, and the black speck which indicates varying densities in the cartilage.

Chondroma of thyroid cartilage (2 of 4)
Same patient, endoscopic view of the larynx, again showing the abnormality (at arrows). Here the abnormality looks similar to a saccular cyst, but the scan (and subsequent biopsy) shows that it is cartilaginous and a chondroma, not chondrosarcoma.

Chondroma of thyroid cartilage (3 of 4)
Closer view of the chondroma, showing an almost bi-lobed appearance.

Chondroma of thyroid cartilage (4 of 4)
Under strobe lighting, which shows that the left vocal cord (right of photo) is apparently at a lower level than the opposite cord.