Legends
Figure 1. The lytic bone lesion on computed tomography scan
(CT) and magnetic resonance imaging (MRI).
- CT scan showing a rounded lytic lesion of the frontal bone,
left-sided, involving the walls of the frontal sinus, measuring 35 x
42 mm in diameter.
- Magnetic resonance imaging showing the frontal bone lesion,
lateralized to the left, with hyposignal in T1-weighted sequences,
enhanced after injection with gadolinium.
Figure 2. Numerous capillary vessels containing erythrocytes,
in between pre-existing bone trabeculae (Haematoxylin-eosin; original
magnification, X 250).