Purpose or Case Report: Pediatric radiologists encounter a variety of focal skull lesions and often the diagnosis is not easy to achieve. The spectrum of the skull lesions in children is broad and encompasses pathologies that can be congenital, acquired, benign, malignant, infectious, or posttraumatic. The purpose of this exhibit is to review the imaging findings of both common and rare focal skull lesions in the pediatric age group.
Methods & Materials: The lesions discussed in this exhibit are demonstrated using radiographs, ultrasound, CT and MRI. Detailed analysis of imaing identifying the involvement of the epidural space, inner and outer table, diploic space, subperiosteal, subgaleal and subpareosteal spaces helps to establish a differential diagnosis. We will present the most common, as well as some of the rare and interesting skull lesions.

Some of the skull lesions we encountered in our practice are:
- Neoplastic: Langerhans Cell Histiocytosis, neuroblastoma metastasis, intraosseous meningioma, and cranial fascitis.
- Infectious: Osteomyelitis and abscess.
- Congenital: Cephaloceles, Wormian bones, vascular anomalies and dermoids.
- Postraumatic: Growing fracture, cephalohematoma and pseudomeningeocele.
Results:
Conclusions: Skull lesions are heterogenous and variable in children, and often a diagnostic dilemma. A good understanding of the common and rare etiologies of focal skull lesions as well as detailed imaging analysis are helpful to establish an acute differential diagnosis and direct appropriate patient care.