Infection of the FRONTAL BONE often as a complication of FRONTAL SINUSITIS or trauma to the frontal bone and skull. It is characterized by subperiosteal abscess with OSTEOMYELITIS.

Inflammation of the NASAL MUCOSA in the FRONTAL SINUS. In many cases, it is caused by an infection of the bacteria STREPTOCOCCUS PNEUMONIAE or HAEMOPHILUS INFLUENZAE.

The bone that forms the frontal aspect of the skull. Its flat part forms the forehead, articulating inferiorly with the NASAL BONE and the CHEEK BONE on each side of the face.

'Osteomyelitis' is a medical condition defined as an inflammation or infection of the bone or marrow, often caused by bacteria or fungi, which can lead to symptoms such as pain, swelling, warmth, and redness in the affected area, and may require antibiotics or surgical intervention for treatment.