Figure 1.
An 87-year-old man with a phosphaturic mesenchymal tumor in the ethmoid
sinus (case 9). a) Radiograph of the right knee demonstrates
coarse trabecular bone involving distal femur, proximal tibia, and
proximal fibula with the presence of pseudofractures.b) Radiograph of the left humerus demonstrates pseudofractures.c) A lumbar spine radiograph reveals diffuse osteopenia with
variable decreases in vertebral body heights. d)99mTc bone scintigraphy reveals increased tracer
uptake in multiple ribs, vertebral bodies, the left humerus, the right
distal femur, the right proximal tibia, and the left distal tibia,
indicating multiple pseudofractures. e) Coronal brain MRI
reveals a lobulated mass (white arrow) in the ethmoid sinus with
extension to the skull base.