A 32-year-old woman was involved in an automobile accident, during which she hit the left frontal region of her head. Skull fi lms revealed an asymptomatic lytic lesion in the general region of the trauma (figs. 1 A and 1 B) . There was no external evidence of this lesion on physical examination. Neurologic examination was unremarkable and a bone scan was normal. A CT scan showed a lowdensity l...

Cranial bone and epidural tuberculosis is rare manifestation extrapulmonary tuberculosis. The incidence of tuberculosis of calvaria is on the rise in developing countries because of malnutrition, poor socioeconomic conditions, and immunodeficiency. We present the clinical features, radiology, histopathology, and surgical findings of a case of tuberculosis of the frontal bone with epidural exten...

SummaryOsteomyelitis of the skull is a rare clinical presentation. It usually occurs as a complication of trauma or sinusitis. Its complications can be life threatening though the initial symptoms and signs are subtle. Early diagnosis and appropriate management to prevent CNS complications reduce morbidity and mortality significantly. Intracranial complications of sinusitis, focal infections an...

A 21-year-old man walked into the ED complaining of mild headache after colliding with another player during a baseball game. The patient denied loss of consciousness and noted numbness over his left forehead. He denied vision change, fluid from his nose or ears, dizziness or other injury. He had normal mentation, no neck pain, and an otherwise non-focal exam. He declined pain medication. A vis...

Rationale:Primary osteosarcomas of the skull and skull base are rare, comprising<2% of all skull tumors. Primary osteosarcomas of the skull are aggressive neoplasms composed of spindle cells producing osteoid which have poor outcome. Patientconcerns:A 33-year-old woman was admitted to our hospital with a major complaint of a growingmass on her left frontal region of the skull for 10 months. Pri...

Frontal sinuses in goats and other mammals have been hypothesized to function as shock absorbers, protecting the brain from blows during intraspecific combat. Furthermore, sinuses are thought to form through removal of ;structurally unnecessary' bone. These hypotheses were tested using finite element modeling. Three-dimensional models of domesticated goat (Capra hircus) skulls were constructed,...

Bone formation and skeletal repair are dynamic processes involving a fine-tuned balance between osteoblast proliferation and differentiation orchestrated by multiple signaling pathways. Canonical Wnt (cWnt) signaling is known to playing a key role in these processes. In the current study, using a transgenic mouse model with targeted disruption of axin2, a negative regulator of cWnt signaling, w...

Cholesterol granulomas are common in the mastoid antrum and air cells of the temporal bone. In the paranasal sinuses, especially in the frontal sinus, they have occasionally been mentioned in the literature. The pathogenesis is unknown, but the majority of the authors support the concept of airway obstruction in the cells well pneumatised of temporal bone and paranasal sinuses. The authors repo...