Benign osteoblastoma located in the parietal bone

Abstract

Benign osteoblastoma is an uncommon primary bone tumor, extremely rare in calvarium. We present a case of a 25-year-old female with an osteoblastoma of parietal bone which was totally resected. The authors discussed the clinical presentation, radiographic finding, differential diagnosis and management of the benign calvarial osteoblastoma with a review of the literature.

Keywords: Osteoblastoma; Parietal bone.

Fig. 1

Plain radiography showing a focal bulging mass at right parietal bone. A : Anteroposterior view. B : Lateral view.

Fig. 2

Computed tomographic scan demonstrating a focal bulging mass of right parietal bone with ground glass opacity of widened diploic space. A : Axial view. B : Sagittal view.

Fig. 3

A : Axial T2-weighted images show slightly inhomogeneous low signal at the lesion. B : T1-weighted images also show slightly inhomogeneous low signal at the lesion. C : T1-weighted images obtained after intravenous administration Gd-DTPA show inhomogeneous enhancement in the lesion.

Fig. 4

Postoperative CT scans showing right parietal craniectomy with cranioplasty state.

Fig. 5

Photomicrographs showing the tumor is composed of haphazard proliferation of interlacing trabeculae with osteoblasting rimming in fibrovascular stroma. (H & E stain, ×100)