Intradiploic ciliated epithelial inclusion cyst of the skull

Intradiploic Epithelial Inclusion Cyst of the Cranium Mimicking Fibrous Dysplasia

Intradiploic inclusion cysts are exceedingly rare in the pediatric population. The authors present a 16-year-old male patient who presented with a large growing calvarial mass with a preoperative diagnosis of fibrous dysplasia based on radiologic imaging. Craniectomy followed by autogenous reconstruction was performed. Histopathological examination revealed a relatively small inclusion cyst of the intradiploic space, surrounded by reactive bone. This patient demonstrates a highly unusual presentation of a rare entity, and the authors discuss the diagnosis and management of intradiploic inclusion cysts.

A rare localization of pure dermoid cyst in the frontal bone

We report the case of an 84-year-old woman who came to our attention with right palpebral edema associated with pain in the omolateral fronto-orbital region. The patient underwent an MRI scan that revealed a rounded, extracerebral intradiploic cystic lesion with dyshomogeneous signal intensity. Computed tomography (CT) imaging was also performed with reformatted 3D reconstruction. Post-surgical histologic analysis confirmed the diagnosis of intradiploic dermoid cyst. We here report the case and discuss epidemiology, imaging features and work-up of this pathological entity.