PMC4899633_01
Plain radiography. a A ground-glass appearance with marked calcification and a pathological minor fracture in the right proximal femur. b Multiple ground-glass appearances in the skull.
cro-0009-0126-g01.jpg
PMC4899633_01_cro-0009-0126-g01.jpg
F1
A marked calcification-like shadow associated with a pathological fracture without displacement was seen inside the lesion (fig. 1a). In addition, multiple areas of bone thickening of the skull with a ground-glass appearance were observed (fig. 1b).
MRI. a Isointensity with punctate low signal intensity on T1-weighted images. b Irregular high signal intensity on T2-weighted images. c Irregular peripheral predominant enhancement on Gd contrast-enhanced images.
cro-0009-0126-g02.jpg
PMC4899633_01_cro-0009-0126-g02.jpg
F2
The lesion showed isointensity with punctate low signal intensity in some areas on T1-weighted magnetic resonance imaging (MRI) images (fig. 2a) and irregular high-signal intensity on T2-weighted images (fig. 2b). Irregular peripheral predominant enhancement was seen on gadolinium (Gd) contrast-enhanced images (fig. 2c).
Bone scintigraphy showing an accumulation of radioactivity in the right ilium, right proximal femur, right proximal ulna, and the skull.
cro-0009-0126-g03.jpg
PMC4899633_01_cro-0009-0126-g03.jpg
F3
Bone scintigraphy revealed an accumulation of radioactivity in the right ilium, right proximal femur, right proximal ulna, and skull (fig. 3).
a Pathological fracture with displacement in the metaphysis of the right femur. b Artificial bone was implanted after curettage and fixed with a locking plate so that the varus of the proximal femur was corrected.
cro-0009-0126-g04.jpg
PMC4899633_01_cro-0009-0126-g04.jpg
F4
Plain radiography showed a pathological fracture with displacement in the metaphysis of the right femur (fig. 4a). During the surgery, artificial bone was implanted after curettage and fixed with a locking plate so that the varus of the proximal femur was corrected (fig. 4b).
Histopathological findings of the specimen. a Nodular hyaline cartilage tissue is present in the majority of the specimen without marked atypia. b Proliferation of fibroblast-like spindle cells and woven bone were evident in parts of the lesion.
cro-0009-0126-g05.jpg
PMC4899633_01_cro-0009-0126-g05.jpg
F5
Histopathological findings of the specimen obtained by curettage showed that nodular hyaline cartilage tissue was present in the majority of the specimen without marked atypia (fig. 5a). Proliferation of fibroblast-like spindle cells and woven bone were evident in part of the lesion (fig. 5b), and his final diagnosis was FCD.